Metal-free carbon materials-catalyzed sulfate radical-based advanced oxidation processes: A review on heterogeneous catalysts and applications
作者：
Zhao, Qingxia;Mao, Qiming;Zhou, Yaoyu* ;Wei, Jianhong* ;Liu, Xiaocheng;Yang, Junying;Luo, Lin;Zhang, Jiachao;Chen, Hong;Chen, Hongbo;Tang, Lin
期刊：
Chemosphere ,2017年189:224-238 ISSN：0045-6535
通讯作者：
Zhou, Yaoyu;Wei, Jianhong
作者机构：
[Liu, Xiaocheng; Mao, Qiming; Yang, Junying; Zhao, Qingxia; Zhou, Yaoyu; Zhang, Jiachao; Luo, Lin] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.;[Wei, Jianhong] Hunan Agr Univ, Coll Biol Sci & Technol, Changsha 410128, Hunan, Peoples R China.;[Chen, Hong] Changsha Univ Sci & Technol, Sch Hydraul Engn, Changsha 410004, Hunan, Peoples R China.;[Chen, Hongbo] Xiangtan Univ, Coll Environm & Resources, Xiangtan 411105, Peoples R China.;[Tang, Lin] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.
通讯机构：
[Zhou, Yaoyu] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.;[Wei, Jianhong] Hunan Agr Univ, Coll Biol Sci & Technol, Changsha 410128, Hunan, Peoples R China.
关键词：
Advanced oxidation processes;Carbon materials;Sulfate radical;Metal-free catalyst;Heterogeneous
摘要：
In recent years, advanced oxidation processes (AOPs), especially sulfate radical based AOPs have been widely used in various fields of wastewater treatment due to their capability and adaptability in decontamination. Recently, metal-free carbon materials catalysts in sulfate radical production has been more and more concerned because these materials have been demonstrated to be promising alternatives to conventional metal-based catalysts, but the review of metal-free catalysts is rare. The present review outlines the current state of knowledge on the generation of sulfate radical using metal-free catalysts including carbon nanotubes, graphene, mesoporous carbon, activated carbon, activated carbon fiber, nanodiamond. The mechanism such as the radical pathway and non-radical pathway, and factors influencing of the activation of sulfate radical was also be revealed. Knowledge gaps and research needs have been identified, which include the perspectives on challenges related to metal-free catalyst, heterogeneous metal-free catalyst/persulfate systems and their potential in practical environmental remediation. (C) 2017 Elsevier Ltd. All rights reserved.
语种：
英文
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Electrocatalytic properties of N-doped graphite felt in electro-Fenton process and degradation mechanism of levofloxacin
作者：
Liu, Xiaocheng;Yang, Danxing;Zhou, Yaoyu* ;Zhang, Jiachao* ;Luo, Lin;Meng, Sijun;Chen, Song;Tan, Mengjiao;Li, Zhicheng;Tang, Lin
期刊：
Chemosphere ,2017年182:306-315 ISSN：0045-6535
通讯作者：
Zhou, Yaoyu;Zhang, Jiachao
作者机构：
[Liu, Xiaocheng; Tan, Mengjiao; Li, Zhicheng; Zhou, Yaoyu; Zhou, YY; Zhang, Jiachao; Yang, Danxing; Meng, Sijun; Luo, Lin] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.;[Tang, Lin; Chen, Song] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.
通讯机构：
[Zhou, YY; Zhang, JC] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.
关键词：
Electro-Fenton;Levofloxacin;N-doped graphite felt;Hydrogen evolution reaction;Mechanism
摘要：
The degradation of antibiotic levofloxacin was investigated by dimensionally stable anode as well as modified cathode using low-cost chemical reagents of hydrazine hydrate and ethanol for electro-Fenton in an undivided cell at pH 3.0 under room temperature. Comparison of unmodified and modified cathode was performed. The apparent rate constant of levofloxacin decay was found to be 0.2883 min<sup>−1</sup>for graphite felt-10 with the best performance at 200 mA, which is lower than graphite felt at 400 mA. The optimum modified cathode showed a significant improvement of complete mineralization of levofloxacin, reaching a 92% TOC removal at 200 mA for 480 min higher than unmodified one at twice the current. Surface physicochemical properties and morphology were investigated by scanning electron microscope, contact angle and X-ray photoelectron spectroscopy. The electrochemical characterization of hydrogen evolution reaction was adopted to clarify a possible pathway for the higher mineralization of levofloxacin, indicating a potential pilot-scale study to the pollution with the similar structure. ©2017
语种：
英文
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Iron Containing Metal-Organic Frameworks: Structure, Synthesis, and Applications in Environmental Remediation
作者：
Liu, Xiaocheng;Zhou, Yaoyu;Zhang, Jiachao;Tang, Lin;Luo, Lin;Zeng, Guangming
期刊：
ACS Applied Materials and Interfaces ,2017年9(24):20255-20275 ISSN：1944-8244
通讯作者：
Zhou, YY
作者机构：
[Liu, Xiaocheng; Zhou, Yaoyu; Zhang, Jiachao; Luo, Lin] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.;[Tang, Lin; Zeng, Guangming] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.
通讯机构：
[Zhou, YY ] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.;Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.
关键词：
iron-containing MOFs;structure design;synthesis;adsorption;catalytic degradation
摘要：
Metal-organic frameworks (MOFs) with Fe content are gradually developing into an independent branch in environmental remediation, requiring economical, effective, low-toxicity strategies to the complete procedure. In this review, recent advancements in the structure, synthesis, and environmental application focusing on the mechanism are presented. The unique structure of novel design proposed specific characteristics of different iron-containing MOFs with potential innovation. Synthesis of typical MILs, NH<inf>2</inf>-MILs and MILs based materials reveal the basis and defect of the current method, indicating the optimal means for the actual requirements. The adsorption of various contamination with multiple interaction as well as the catalytic degradation over radicals or electron-hole pairs are reviewed. This review implied considerable prospects of iron-containing MOFs in the field of environment and a more comprehensive cognition into the challenges and potential improvement. ©2017 American Chemical Society.
语种：
英文
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Synthesis of reactive nanoscale zero valent iron using rectorite supports and its application for Orange II removal
作者：
Luo, Si;Qin, Pufeng;Shao, Jihai;Peng, Liang;Zeng, Qingru;Gu, Ji-Dong
期刊：
Chemical Engineering Journal ,2013年223:1-7 ISSN：1385-8947
通讯作者：
Gu, JD
作者机构：
[Luo, Si; Qin, Pufeng; Shao, Jihai; Peng, Liang; Zeng, Qingru; Gu, Ji-Dong] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.;[Gu, Ji-Dong] Univ Hong Kong, Sch Biol Sci, Lab Environm Microbiol & Toxicol, Hong Kong, Hong Kong, Peoples R China.
通讯机构：
[Gu, JD ] Univ Hong Kong, Sch Biol Sci, Lab Environm Microbiol & Toxicol, Pokfulam Rd, Hong Kong, Hong Kong, Peoples R China.;Univ Hong Kong, Sch Biol Sci, Lab Environm Microbiol & Toxicol, Pokfulam Rd, Hong Kong, Hong Kong, Peoples R China.
关键词：
Zero valent iron;Rectorite;Nanocomposite;Orange II;Reduction
摘要：
The nanoscale zero valent iron-rectorite (nZVI-R) composite was successfully synthesized through incorporation of nano-zero valent iron (nZVI) into the natural rectorite as supports. Iron ions were imbedded in the interlayer of rectorite clay via an ion-exchange reaction, and then the exchangeable Fe(III) cations were reduced to nZVI by NaBH<inf>4</inf> in solution. The confinement of Fe crystal growth in the interlayer regions of rectorite resulted in the formation of nZVI particles at ca. 10.3nm. The structure, morphology, Fe species, crystal phase, and elemental composition of the prepared nZVI-R composite materials were characterized using X-ray diffraction (XRD), high-resolution transmission electron microscopy (HR-TEM), X-ray photoelectron spectroscopy (XPS) and X-ray fluorescence (XRF). Comparing with the commercially available nZVI-Junye, nZVI prepared in laboratory (nZVI-Lab) and Na-rectorite, the synthesized nZVI-R composite in this study showed superior decolorization efficiency for Orange II with 0.2g of nZVI-R and a complete removal of Orange II achieved in less than 10min. On the basis of FT-IR spectra, the mechanism for nZVI-R in the discoloration of Orange II was also postulated. This nZVI-R composite has potential applications in cleaning up environmental contaminants such as organic dyes or halogen compounds. ©2012 Published by Elsevier B.V.
语种：
英文
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Remediation of Heavy Metal-Polluted Agricultural Soils Using Clay Minerals: A Review
作者：
Xu Yi;Liang Xuefeng* ;Xu Yingming;Qin Xu;Huang Qingqing;Wang Lin;Sun Yuebing
期刊：
Pedosphere ,2017年27(2):193-204 ISSN：1002-0160
通讯作者：
Liang Xuefeng
作者机构：
[Xu Yi] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.;[Huang Qingqing; Qin Xu; Wang Lin; Xu Yingming; Sun Yuebing; Liang Xuefeng] Minist Agr, Agroenvironm Protect Inst, Innovat Team Remediat Heavy Met Contaminated Farm, Tianjin 300191, Peoples R China.;[Huang Qingqing; Qin Xu; Wang Lin; Xu Yingming; Sun Yuebing; Liang Xuefeng] MOA, Key Lab Original Environm Qual, Tianjin Key Lab Agroenvironm & Agroprod Safety, Tianjin 300191, Peoples R China.
通讯机构：
[Liang Xuefeng] Minist Agr, Agroenvironm Protect Inst, Innovat Team Remediat Heavy Met Contaminated Farm, Tianjin 300191, Peoples R China.;[Liang Xuefeng] MOA, Key Lab Original Environm Qual, Tianjin Key Lab Agroenvironm & Agroprod Safety, Tianjin 300191, Peoples R China.
关键词：
bentonite;bioavailability;immobilization;liming effect;palygorskite;sepiolite;soil pH
摘要：
Heavy metal contamination of agricultural soils poses risks and hazards to humans. The remediation of heavy metal-polluted soils has become a hot topic in environmental science and engineering. In this review, the application of clay minerals for the remediation of heavy metal-polluted agricultural soils is summarized, in terms of their remediation effects and mechanisms, influencing factors, and future focus. Typical clay minerals, natural sepiolite, palygorskite, and bentonite, have been widely utilized for the in-situ immobilization of heavy metals in soils, especially Cd-polluted paddy soils and wastewater-irrigated farmland soils. Clay minerals are able to increase soil pH, decrease the chemical-extractable fractions and bioavailability of heavy metals in soils, and reduce the heavy metal contents in edible parts of plants. The immobilization effects have been confirmed in field-scale demonstrations and pot trials. Clay minerals can improve the environmental quality of soils and alleviate the hazards of heavy metals to plants. As main factors affecting the immobilization effects, the pH and water condition of soils have drawn academic attention. The remediation mechanisms mainly include liming, precipitation, and sorption effects. However, the molecular mechanisms of microscopic immobilization are unclear. Future studies should focus on the long-term stability and improvement of clay minerals in order to obtain a better remediation effect.
语种：
英文
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Effects of soil acidification and liming on the phytoavailability of cadmium in paddy soils of central subtropical China
作者：
Zhu, Hanhua;Chen, Cheng;Xu, Chao;Zhu, Qihong* ;Huang, Daoyou
期刊：
Environmental Pollution ,2016年219:99-106 ISSN：0269-7491
通讯作者：
Zhu, Qihong
作者机构：
[Huang, Daoyou; Zhu, Hanhua; Xu, Chao; Zhu, Qihong] Chinese Acad Sci, Inst Subtrop Agr, Key Lab Agroecol Proc Subtrop Reg, Changsha 410125, Hunan, Peoples R China.;[Chen, Cheng] Hunan Agr Resources & Environm Protect Stn, Changsha 410005, Hunan, Peoples R China.;[Chen, Cheng] Hunan Agr Univ, Coll Resource & Environm, Changsha 410128, Hunan, Peoples R China.
通讯机构：
[Zhu, Qihong] Chinese Acad Sci, Inst Subtrop Agr, Key Lab Agroecol Proc Subtrop Reg, Changsha 410125, Hunan, Peoples R China.
关键词：
Soil acidification;Cadmium;Phytoavailability;Liming;Paddy soil
摘要：
Intensive and paired soil and rice grain survey and multiple-field liming experiments were conducted to assess soil acidification in the past 30 years, quantify the relationships of Cd phytoavailability with soil acidity, and determine efficacies of liming on soil acidity and Cd phytoavailability in paddy soils of central subtropical China at a regional scale. Soil pH, total and extractable Cd (Cd<inf>tot</inf>and Cd<inf>ext</inf>), rice grain Cd were determined, and all measured data were analyzed separately in groups of 0.1 pH units intervals. Paddy soil pH averagely declined at 0.031 unit yr<sup>−1</sup>between 1980s and 2014 (P <0.01). Piecewise means of log Cd transfer ratio kept around −0.062 between soil pH 4.0 and 5.5 and around −1.31 between pH 6.9 and 7.3, whereas linearly decreased by a factor of 0.76 with pH 5.5–6.9, and by a factor of 1.38 with pH 7.3–8.2 (P <0.01), respectively. Similar responses to soil pH were observed for soil Cd<inf>ext</inf>to Cd<inf>tot</inf>ratio. However, the former exhibited a lag effect to soil acidification in the acidic soils and a leading effect in alkaline soils. Liming increased soil pH by 0.50 units, and decreased rice grain Cd by 35.3% and log Cd transfer ratio by a factor of 0.76 (P <0.01). The piecewise relationship based on the survey precisely predicted the changes in Cd transfer ratio across the multiple-field liming experiments. In conclusion, soil acidification occurred and accelerated in the past 30 years, and piecewise-linearly increased Cd phytoavailability of paddy soils in central subtropical China. Mitigating soil acidification, i.e. liming, should be preferentially implemented to minimize Cd phytoavailability. ©2016 Elsevier Ltd
语种：
英文
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Enhancement of the Photoelectrochemical Performance of WO3 Vertical Arrays Film for Solar Water Splitting by Gadolinium Doping
作者：
Liu, Yang;Li, Jie;Li, Wenzhang* ;Yang, Yahui;Li, Yaomin;Chen, Qiyuan
期刊：
Journal of Physical Chemistry C ,2015年119(27):14834-14842 ISSN：1932-7447
通讯作者：
Li, Wenzhang
作者机构：
[Li, Jie; Liu, Yang; Li, Wenzhang; Chen, Qiyuan] Cent S Univ, Sch Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China.;[Yang, Yahui] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.;[Li, Yaomin] UCL, Dept Chem, London WC1H 0AJ, England.
通讯机构：
[Li, Wenzhang] Cent S Univ, Sch Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China.
摘要：
In this study, WO<inf>3</inf>nanoplates modified by doping with gadolinium (Gd) were synthesized by a hydrothermal method. The effect of the rare-earth element on the photoelectrochemical (PEC) performance of WO<inf>3</inf>one- or two-dimensional (2D) materials was examined. Scanning electron microscopy, transmission electron microscopy, and X-ray diffraction were employed to examine the crystal phase and morphology of the Gd-doped nanoplates thus prepared. Results of UV-vis spectroscopy, valence-band (VB) X-ray photoelectron spectroscopy, and Mott-Schottky analyses indicated that the conduction band and VB potentials of WO<inf>3</inf>shifted to negative values. Linear sweep voltammetry results indicated that the photocurrent density increased by 153% after modification by doping with Gd. In addition, the PEC properties of the WO<inf>3</inf>nanoplates obtained by the intensity-modulated photocurrent spectrum and incident photon-to-current conversion efficiency measurements indicated that modification by doping with Gd has a scintillating application in improving the PEC conversion properties of WO<inf>3</inf>-based 2D materials. ©2015 American Chemical Society.
语种：
英文
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Carbon sequestration efficiency in paddy soil and upland soil under long-term fertilization in southern China
作者：
Yan, X.;Zhou, H.;Zhu, Q. H.;Wang, X. F.;Zhang, Y. Z.;Yu, X. C.;Peng, X.*
期刊：
Soil and Tillage Research ,2013年130:42-51 ISSN：0167-1987
通讯作者：
Peng, X.
作者机构：
[Peng, X.; Yan, X.; Wang, X. F.; Zhu, Q. H.; Zhou, H.] Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Jiangsu, Peoples R China.;[Yan, X.; Zhang, Y. Z.] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.;[Yu, X. C.] Inst Red Soil, Jinxian 331700, Peoples R China.
通讯机构：
[Peng, X.] Chinese Acad Sci, Inst Soil Sci, State Key Lab Soil & Sustainable Agr, Nanjing 210008, Jiangsu, Peoples R China.
关键词：
Carbon sequestration efficiency;Long-term agroecosystem;Paddy soil;Soil carbon saturation;Soil structure
摘要：
Soil organic carbon (SOC) stock can be improved through the return of crop residues. However, the efficiency of C sequestered in soil (i.e., ΔSOC/ΔC input) might differ among crop systems. In this paper, we investigated the C input and SOC stabilization in paddy soil and upland soil under different long-term fertilization practices. Our objectives were to determine (i) the response of SOC stock to C input under different fertilization practices, and (ii) C sequestration efficiency in the two contrasting agroecosystems. The long-term fertilization experiment in paddy soil started in 1981, while the adjacent upland soil experiment commenced in 1986. Each experiment consists of 9 treatments: CK (no fertilization), N, P, K, NP, NK, NPK, 2NPK (double dose), and NPKOM (NPK plus organic manure). Physical SOC fractions (cPOM, silt+clay_f, fPOM, iPOM_m, silt+clay_m) were isolated by sieving, dispersion, and density flotation. Fertilization increased crop yield and C input, but it did not change the quality of SOC as revealed by CPMAS-<sup>13</sup>C NMR spectra. During the period of the experiment, SOC stock was improved by 6.7-15.3Mgha<sup>-1</sup> in paddy soil for all fertilization practices, while in upland soil the CK, N, P, K, and NP fertilizations reduced the SOC by 1.2-3.8MgCha<sup>-1</sup> and the other four fertilizations increased it by 0.5-7.4MgCha<sup>-1</sup>. The change in SOC was mainly ascribed to the POM fraction, whereas the two silt+clay sized fractions were independent of fertilization practice except the NPKOM treatment. At a given C input, the C sequestration efficiency was greater in paddy soil than in upland soil, which may be attributed to lower microbial activity but greater chemical (i.e., oxalate-soluble Fe) and physical stabilizations (i.e., soil structure) in paddy field. Our results indicate that paddy soil may sequester more SOC, with higher efficiency, than upland soil does. ©2013 Elsevier B.V.
语种：
英文
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Photoelectrochemical activity of NiWO4/WO3 heterojunction photoanode under visible light irradiation
作者：
Zhu, Jing;Li, Wenzhang;Li, Jie* ;Li, Yaomin;Hu, Haishi;Yang, Yahui
期刊：
Electrochimica Acta ,2013年112:191-198 ISSN：0013-4686
通讯作者：
Li, Jie
作者机构：
[Li, Jie; Li, Yaomin; Hu, Haishi; Li, Wenzhang; Zhu, Jing] Cent S Univ, Sch Chem & Chem Engn, Minist Educ, Key Lab Resources Chem Nonferrous Met, Changsha 410083, Hunan, Peoples R China.;[Yang, Yahui] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.
通讯机构：
[Li, Jie] Cent S Univ, Sch Chem & Chem Engn, Minist Educ, Key Lab Resources Chem Nonferrous Met, Changsha 410083, Hunan, Peoples R China.
会议名称：
12th International Fischer Symposium
会议时间：
JUN 03-07, 2012
会议地点：
Lubeck, GERMANY
会议主办单位：
[Zhu, Jing;Li, Wenzhang;Li, Jie;Li, Yaomin;Hu, Haishi] Cent S Univ, Sch Chem & Chem Engn, Minist Educ, Key Lab Resources Chem Nonferrous Met, Changsha 410083, Hunan, Peoples R China.^[Yang, Yahui] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.
关键词：
Tungsten oxide;Nickel tungstate;Heterojunction;Photoelectrochemical;Photoanode
摘要：
NiWO<inf>4</inf>/WO<inf>3</inf> heterojunction photoanode was fabricated for the first time to enhance the photoelectrochemical (PEC) performance under visible light irradiation. Such a photoanode was prepared using a simple deposition-annealing method of NiWO<inf>4</inf> nanoparticles onto the surface of porous WO<inf>3</inf> films. It was found that the NiWO<inf>4</inf>/WO <inf>3</inf> film synthesized with 25 mM Ni(NO<inf>3</inf>)<inf>2</inf> in ethanol exhibited the best PEC performance, which achieved a 70% increase compared with the pure WO<inf>3</inf> film under similar conditions. The promising composite photoanode is desired to be employed for water splitting in the PEC cells. The heterojunction structure offers enhanced photoconversion efficiency and increased the density of carriers. This study reveals that introducing NiWO<inf>4</inf> into WO<inf>3</inf> films could facilitate the separation and restrain the recombination of photo-generated electron-hole pairs and accelerate the electrons transfer. Synthesis details are discussed, with film morphologies and structures characterized by X-ray diffraction, field emission scanning electron microscope, transmission electron microscope and X-ray photoelectron spectroscopy. ©2013 Published by Elsevier Ltd. All rights reserved.
语种：
英文
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Treatment of arsenic in acid wastewater and river sediment by Fe@Fe2O3 nanobunches: The effect of environmental conditions and reaction mechanism
作者：
Tang, Lin* ;Feng, Haopeng;Tang, Jing;Zeng, Guangming* ;Deng, Yaocheng;Wang, Jiajia;Liu, Yani;Zhou, Yaoyu
期刊：
Water Research ,2017年117:175-186 ISSN：0043-1354
通讯作者：
Tang, Lin;Zeng, Guangming
作者机构：
[Zeng, Guangming; Wang, Jiajia; Feng, Haopeng; Deng, Yaocheng; Tang, Lin; Tang, Jing; Liu, Yani; Tang, L; Zeng, GM] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Zeng, Guangming; Wang, Jiajia; Feng, Haopeng; Deng, Yaocheng; Tang, Lin; Tang, Jing; Liu, Yani] Hunan Univ, Key Lab Environm Biol & Pollut Control, Changsha 410082, Hunan, Peoples R China.;[Zhou, Yaoyu] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.
通讯机构：
[Tang, L; Zeng, GM] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.
关键词：
Arsenic treatment;Zero valent iron;Core-shell structure;[email protected]2O3 nanobunches;Adsorption;Oxidation
摘要：
High concentration of arsenic in acid wastewater and polluted river sediment caused by metallurgical industry has presented a great environmental challenge for decades. Nanoscale zero valent iron (nZVI) can detoxify arsenic-bearing wastewater and groundwater, but the low adsorption capacity and rapid passivation restrict its large-scale application. This study proposed a highly efficient arsenic treatment nanotechnology, using the core-shell Fe@Fe<inf>2</inf>O<inf>3</inf>nanobunches (NBZI) for removal of arsenic in acid wastewater with cyclic stability and transformation of arsenic speciation in sediment. The adsorption capacity of As(III) by NBZI was 60 times as high as that of nanoscale zero valent iron (nZVI) at neutral pH. Characterization of the prepared materials after reaction revealed that the contents of As(III) and As(V) were 65% and 35% under aerobic conditions, respectively, which is the evidence of oxidation included in the reaction process apart from adsorption and co-precipitation. The presence of oxygen was proved to improve the adsorption ability of the prepared NBZI towards As(III) with the removal efficiency increasing from 68% to 92%. In order to further enhance the performance of NBZI-2 in the absence of oxygen, a new Fenton-Like system of NBZI/H<inf>2</inf>O<inf>2</inf>to remove arsenic under the anoxic condition was also proposed. Furthermore, the removal efficiency of arsenic in acid wastewater remained to be 78% after 9 times of cycling. Meanwhile, most of the mobile fraction of arsenic in river sediment was transformed into residues after NBZI treatment for 20 days. The reaction mechanism between NBZI and arsenic was discussed in detail at last, indicating great potential of NBZI for the treatment of arsenic in wastewater and sediment. ©2017 Elsevier Ltd
语种：
英文
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Treatment of landfill leachate using immobilized Phanerochaete chrysosporium loaded with nitrogen-doped TiO2 nanoparticles
作者：
Hu, Liang;Zeng, Guangming* ;Chen, Guiqiu;Dong, Haoran;Liu, Yutang;Wan, Jia;Chen, Anwei;Guo, Zhi;Yan, Ming;Wu, Haipeng;Yu, Zhigang
期刊：
Journal of Hazardous Materials ,2016年301:106-118 ISSN：0304-3894
通讯作者：
Zeng, Guangming
作者机构：
[Zeng, Guangming; Dong, Haoran; Liu, Yutang; Yu, Zhigang; Guo, Zhi; Wu, Haipeng; Chen, Guiqiu; Wan, Jia; Yan, Ming; Hu, Liang] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Zeng, Guangming; Dong, Haoran; Liu, Yutang; Yu, Zhigang; Guo, Zhi; Wu, Haipeng; Chen, Guiqiu; Wan, Jia; Yan, Ming; Hu, Liang] Hunan Univ, Key Lab Environm Biol & Pollut Control, Minist Educ, Changsha 410082, Hunan, Peoples R China.;[Chen, Anwei] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.
通讯机构：
[Zeng, Guangming] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.
关键词：
Biodegradation;Landfill leachate;Total organic carbon;Ammonia nitrogen;Phanerochaete chrysosporium
摘要：
This study investigated the performance of immobilized Phanerochaete chrysosporium loaded with nitrogen-doped TiO<inf>2</inf>nanoparticles in the treatment of raw landfill leachate with a very low biodegradability ratio (BOD<inf>5</inf>/COD) of 0.09. The effects of various operating parameters, such as initial chemical oxygen demand (COD) concentration, pH, temperature, and biosorbent dosage, were evaluated with respect to the removal efficiency of total organic carbon (TOC) and ammonia nitrogen (NH<inf>3</inf>-N). For the immobilized biosorbents, an optimum pH of 6.0 for TOC and 7.0 for NH<inf>3</inf>-N were found suitable for TOC and NH<inf>3</inf>-N removal at temperature of 37°C, respectively. The most superior removal efficiencies of TOC and NH<inf>3</inf>-N of landfill leachate were over 75% and 74% in 72h at an initial COD concentration of 200mgL<sup>-1</sup>, respectively. In addition, heavy metals were partly removed by the immobilized biosorbents during the process of landfill leachate treatment. The species and mass percentage of organic compounds in landfill leachate after the treatment were found to have considerably declined according to the gas chromatography coupled with mass spectrometry (GC-MS) system. These results indicate that the immobilized P. chrysosporium loaded with nitrogen-doped TiO<inf>2</inf>nanoparticles could be a convenient and efficient method for the treatment of landfill leachate. ©2015 2015 Published by Elsevier B.V.
语种：
英文
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In situ formation of CuWO4/WO3 heterojunction plates array films with enhanced photoelectrochemical properties
作者：
Zhan, Faqi;Li, Jie;Li, Wenzhang* ;Liu, Yisi;Xie, Renrui;Yang, Yahui;Li, Yaomin;Chen, Qiyuan
期刊：
International Journal of Hydrogen Energy ,2015年40(20):6512-6520 ISSN：0360-3199
通讯作者：
Li, Wenzhang
作者机构：
[Zhan, Faqi; Liu, Yisi; Li, Jie; Li, Wenzhang; Chen, Qiyuan] Cent S Univ, Sch Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China.;[Yang, Yahui; Xie, Renrui] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.;[Li, Yaomin] UCL, Dept Chem, London WC1H 0AJ, England.
通讯机构：
[Li, Wenzhang] Cent S Univ, Sch Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China.
关键词：
Tungsten oxide plates;CuWO4/WO3 heterojunction;Water splitting
摘要：
CuWO<inf>4</inf>/WO<inf>3</inf>heterojunction photoanode based on WO<inf>3</inf>plates arrays and CuWO<inf>4</inf>nanoparticles was fabricated to enhance the photoelectrochemical performance. WO<inf>3</inf>plates array films were prepared through a simple hydrothermal method, then a facile dipping-annealing process was employed to fabricate CuWO<inf>4</inf>/WO<inf>3</inf>films. The crystal structure, morphology, composition and optical properties of the samples were analyzed by X-ray diffraction, scanning electron microscope, transmission electron microscope, X-ray photoelectron spectroscopy and UV-vis spectrometry. As-prepared CuWO<inf>4</inf>/WO<inf>3</inf>heterojunction films achieved a photocurrent density of 1.21 mA/cm<sup>2</sup>at 1.5 V vs. Ag/AgCl, which was almost 2-fold higher than that of the pure WO<inf>3</inf>film (0.64 mA/cm<sup>2</sup>) under illumination. The enhanced photocurrent was attributed to the extension of visible light response, increased carriers density, effective separation at the interface of heterojunction and better electron transport properties, which were confirmed by Mott-Schottky and electrochemical impedance spectroscopy. This study reveals that the low-dimensional morphological structure and heterojunction structure are expected to provide a promising photoanode for water splitting. Copyright ©2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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英文
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Construction of Plasmonic Ag and Nitrogen-Doped Graphene Quantum Dots Codecorated Ultrathin Graphitic Carbon Nitride Nanosheet Composites with Enhanced Photocatalytic Activity: Full-Spectrum Response Ability and Mechanism Insight
作者：
Deng, Yaocheng;Tang, Lin* ;Feng, Cheugyang;Zeng, Guanming* ;Wang, Jiajia;Lu, Yue;Liu, Yani;Yu, Jiangfang;Chen, Song;Zhou, Yaoyu
期刊：
ACS Applied Materials and Interfaces ,2017年9(49):42816-42828 ISSN：1944-8244
通讯作者：
Tang, Lin;Zeng, Guanming
作者机构：
[Lu, Yue; Feng, Cheugyang; Wang, Jiajia; Deng, Yaocheng; Yu, Jiangfang; Tang, Lin; Liu, Yani; Zeng, Guanming; Tang, L; Chen, Song] Hunan Univ, Coll Environm Sci & Engn, Minist Educ, Changsha 410082, Hunan, Peoples R China.;[Lu, Yue; Feng, Cheugyang; Wang, Jiajia; Deng, Yaocheng; Yu, Jiangfang; Tang, Lin; Liu, Yani; Zeng, Guanming; Tang, L; Chen, Song] Hunan Univ, Key Lab Environm Biol & Pollut Control, Minist Educ, Changsha 410082, Hunan, Peoples R China.;[Zhou, Yaoyu] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.
通讯机构：
[Tang, L; Zeng, GM] Hunan Univ, Coll Environm Sci & Engn, Minist Educ, Changsha 410082, Hunan, Peoples R China.;[Tang, L; Zeng, GM] Hunan Univ, Key Lab Environm Biol & Pollut Control, Minist Educ, Changsha 410082, Hunan, Peoples R China.
关键词：
surface plasmon resonance;upconversion effect;nitrogen-doped graphene quantum dot;tetracycline;full-spectrum light
摘要：
The full utilization of solar energy has attracted great attention in the photocatalysis and environmental pollutant control. In this study, the local surface plasmon resonance effect of Ag nanoparticles (Ag NPs) with the upconversion property of nitrogen-doped graphene quantum dots (N-GQDs) was first combined for the formation of ternary Ag/N-GQDs/g-C3N4 nanocomposites. The prepared material presents enhanced full-spectrum light response ability, even in near-infrared (NIR) light. The experiment results disclosed that the 0.5% N-GQDs and 2.0% Ag NPs co-doped g-C3N4 show the highest photocatalytic activity, achieving 92.8 and 31.3% removal efficiency under full-spectrum light and NIR light irradiation, respectively, which was three-fold than that of pristine g-C3N4. The boosted photocatalytic activity can be attributed to the synergistic effect among the g-C3N4, N-GQDs, and Ag NPs. The g-C3N4 nanosheets can serve as the reaction matrix and support for the dispersion of N-GQDs and Ag NPs, inhibiting their agglomeration. The existence of Ag NPs and N-GQDs can promote the light absorption and transfer ability, leading to the generation of more photoinduced charges. Simultaneously, N-GQDs and Ag NPs can efficiently transfer and reserve electrons, which can accelerate the photoinduced electrons' migration, inhibiting the recombination. The comprehensive effect of the reasons mentioned above resulted in the unique photocatalytic activity of the prepared Ag/N-GQDs/g-C3N4 nanocomposites. This study provides a new strategy for the formation of highly efficient photocatalysts with broad-spectrum light response ability and the potential for realistic wastewater pollution control. © 2017 American Chemical Society.
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英文
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Mitigating heavy metal accumulation into rice ( Oryza sativa L.) using biochar amendment — a field experiment in Hunan, China
作者：
Zheng, Ruilun;Chen, Zheng;Cai, Chao;Tie, Baiqing;Liu, Xiaoli;Reid, Brian J.;Huang, Qing;Lei, Ming;Sun, Guoxin* ;Baltrenaite, Edita
期刊：
Environmental Science and Pollution Research ,2015年22(14):11097-11108 ISSN：0944-1344
通讯作者：
Sun, Guoxin
作者机构：
[Zheng, Ruilun; Chen, Zheng; Sun, Guoxin] Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China.;[Zheng, Ruilun] Beijing Acad Agr & Forestry Sci, Res & Dev Ctr Grasses & Environm, Beijing 100097, Peoples R China.;[Huang, Qing; Cai, Chao] Chinese Acad Sci, Inst Urban Environm, Xiamen 361003, Peoples R China.;[Tie, Baiqing; Lei, Ming; Liu, Xiaoli] Hunan Agr Univ, Coll Resource & Environm, Changsha 410128, Hunan, Peoples R China.;[Reid, Brian J.] Univ E Anglia, Sch Environm Sci, Norwich NR4 7TJ, Norfolk, England.
通讯机构：
[Sun, Guoxin] Chinese Acad Sci, Res Ctr Ecoenvironm Sci, Beijing 100085, Peoples R China.
关键词：
Biochar;Metal(loid);Rice (Oryza sativa L.);Soil contamination;Hazard quotient
摘要：
A field experiment was conducted to investigate the effect of bean stalk (BBC) and rice straw (RBC) biochars on the bioavailability of metal(loid)s in soil and their accumulation into rice plants. Phytoavailability of Cd was most dramatically influenced by biochars addition. Both biochars significantly decreased Cd concentrations in iron plaque (35-81 %), roots (30-75 %), shoots (43-79 %) and rice grain (26-71 %). Following biochars addition, Zinc concentrations in roots and shoots decreased by 25.0-44.1 and 19.9-44.2 %, respectively, although no significant decreases were observed in iron plaque and rice grain. Only RBC significantly reduced Pb concentrations in iron plaque (65.0 %) and roots (40.7 %). However, neither biochar significantly changed Pb concentrations in rice shoots and grain. Arsenic phytoavailability was not significantly altered by biochars addition. Calculation of hazard quotients (HQ) associated with rice consumption revealed RBC to represent a promising candidate to mitigate hazards associated with metal(loid) bioaccumulation. RBC reduced Cd HQ from a 5.5 to 1.6. A dynamic factor's way was also used to evaluate the changes in metal(loid) plant uptake process after the soil amendment with two types of biochar. In conclusion, these results highlight the potential for biochar to mitigate the phytoaccumulation of metal(loid)s and to thereby reduce metal(loid) exposure associated with rice consumption.
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英文
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Multivariate relationships between microbial communities and environmental variables during co-composting of sewage sludge and agricultural waste in the presence of PVP-AgNPs
作者：
Zhang, Lihua;Zhang, Jiachao;Zeng, Guangming* ;Dong, Haoran;Chen, Yaoning;Huang, Chao;Zhu, Yuan;Xu, Rui;Cheng, Yujun;Hou, Kunjie;Cao, Weicheng;Fang, Wei
期刊：
Bioresource Technology ,2018年261:10-18 ISSN：0960-8524
通讯作者：
Zeng, Guangming
作者机构：
[Zhu, Yuan; Chen, Yaoning; Cheng, Yujun; Zeng, Guangming; Dong, Haoran; Xu, Rui; Fang, Wei; Zhang, Lihua; Cao, Weicheng; Hou, Kunjie] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Zhu, Yuan; Chen, Yaoning; Cheng, Yujun; Zeng, Guangming; Dong, Haoran; Xu, Rui; Fang, Wei; Zhang, Lihua; Cao, Weicheng; Hou, Kunjie] Hunan Univ, Minist Educ, Key Lab Environm Biol & Pollut Control, Changsha 410082, Hunan, Peoples R China.;[Zhang, Jiachao] Hunan Agr Univ, Coll Resources & Environm, Changsha 410082, Hunan, Peoples R China.;[Huang, Chao] Cent South Univ Forestry & Technol, Coll Environm Sci & Engn, Changsha 410004, Hunan, Peoples R China.
通讯机构：
[Zeng, Guangming] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.
关键词：
Co-composting;PVP-AgNPs;16S rDNA;Nitrogen functional genes;Redundancy analysis
摘要：
This study evaluated the contributions of environmental variables to the variations in bacterial 16S rDNA, nitrifying and denitrifying genes abundances during composting in the presence of polyvinylpyrrolidone coated silver nanoparticles (PVP-AgNPs). Manual forward selection in redundancy analysis (RDA) indicated that the variation in 16S rDNA was significantly explained by NO<inf>3</inf><sup>−</sup>-N, while nitrifying genes were significantly related with pH, and denitrifying genes were driven by NO<inf>3</inf><sup>−</sup>-N and TN. Partial RDA further revealed that NO<inf>3</inf><sup>−</sup>-N solely explained 28.8% of the variation in 16S rDNA abundance, and pH accounted for 61.8% of the variation in nitrifying genes. NO<inf>3</inf><sup>−</sup>-N and TN accounted for 34.2% and 9.2% of denitrifying genes variation, respectively. The RDA triplots showed that different genes shared different relationships with environmental parameters. Based on these findings, a composting with high efficiency and quality may be conducted in the future work by adjusting the significant environmental variables.<br/> ©2018 Elsevier Ltd
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英文
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High efficient removal of tetracycline from solution by degradation and flocculation with nanoscale zerovalent iron
作者：
Fu, Yuncong;Peng, Liang* ;Zeng, Qingru;Yang, Yang;Song, Huijuan;Shao, Jihai;Liu, Shiyu;Gu, Jidong
期刊：
Chemical Engineering Journal ,2015年270:631-640 ISSN：1385-8947
通讯作者：
Peng, Liang
作者机构：
[Fu, Yuncong; Peng, Liang; Song, Huijuan; Shao, Jihai; Zeng, Qingru; Gu, Jidong; Liu, Shiyu; Yang, Yang] Hunan Agr Univ, Dept Environm Sci & Engn, Changsha 410128, Hunan, Peoples R China.;[Peng, Liang] Cent S Univ, Sch Met Sci & Technol, Changsha 410083, Hunan, Peoples R China.;[Peng, Liang] Hunan Agr Univ, Coll Resource & Environm, Changsha 410128, Hunan, Peoples R China.
通讯机构：
[Peng, Liang] Hunan Agr Univ, Coll Resource & Environm, Changsha 410128, Hunan, Peoples R China.
关键词：
Iron;Tetracycline;Flocculation;Complex
摘要：
The removal of tetracycline (TC) with nanoscale zerovalent iron modified by starch (starch-NZVI) was investigated using batch experiments as a function of reactant concentration, pH, time, competitive anions and ionic strength. The removal efficiency of 99% was obtained, 30% which was contributed from the adsorption and degradation and 69% which was attributed to flocculation when 500 mg/LTC was processed with 0.20 g/L starch-NZVI. The TC removal capacity of starch-NZVI increases with increasing the TC concentration. Furthermore, the flocculation kinetics was strongly dependent on pH and ionic strength. Neutral environment and high ionic strength can improve efficiently the sedimentation rate. The XPS analysis of flocculation showed that the Fe consisted of mainly Fe(III) and some Fe(II). LC-MS analysis revealed that the organic components included TC and the degradation products which resulted from the oxidization effect for TC. Our results firstly demonstrated that the combination degradation with flocculation is an efficient method on TC removal from solution with NZVI. (C) 2015 Elsevier B.V. All rights reserved.
语种：
英文
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Facile fabrication of mediator-free Z-scheme photocatalyst of phosphorous-doped ultrathin graphitic carbon nitride nanosheets and bismuth vanadate composites with enhanced tetracycline degradation under visible light
作者：
Deng, Yaocheng;Tang, Lin* ;Zeng, Guangming* ;Wang, Jiajia;Zhou, Yaoyu;Wang, Jingjing;Tang, Jing;Wang, Longlu;Feng, Chengyang
期刊：
Journal of Colloid and Interface Science ,2018年509:219-234 ISSN：0021-9797
通讯作者：
Tang, Lin;Zeng, Guangming
作者机构：
[Zeng, Guangming; Wang, Jiajia; Deng, Yaocheng; Tang, Lin; Wang, Jingjing; Tang, Jing; Feng, Chengyang; Tang, L; Zeng, GM] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Zeng, Guangming; Wang, Jiajia; Deng, Yaocheng; Tang, Lin; Wang, Jingjing; Tang, Jing; Feng, Chengyang] Hunan Univ, Minist Educ, Key Lab Environm Biol & Pollut Control, Changsha 410082, Hunan, Peoples R China.;[Zhou, Yaoyu] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.;[Wang, Longlu] Hunan Univ, State Key Lab Chemo Biosensing & Chemometr, Changsha 410082, Hunan, Peoples R China.
通讯机构：
[Tang, L; Zeng, GM] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.
关键词：
Tetracycline;Z-scheme photocatalyst;Phosphorous-doped g-C3N4;BiVO4;Visible light response
摘要：
To realize the sustainable employment of solar energy in contaminant degradation and environmental recovery, design and development of an efficient photocatalyst is urgently needed. Herein, a novel direct Z-scheme composite photocatalysts consist of phosphorous-doped ultrathin g-C<inf>3</inf>N<inf>4</inf>nanosheets (PCNS) and bismuth vanadate (BiVO<inf>4</inf>) are developed via a one-pot impregnated precipitation method. The as-prepared hybrid nanocomposite was utilized for the degradation tetracycline (TC) under visible light irradiation. Among the composites with various PCNS/BiVO<inf>4</inf>ratios, the prepared PCNS/BVO-400 photocatalyst presents the best performance, showing a TC (10 mg/L) removal efficiency of 96.95% within 60 min, more than double that of pristine BiVO<inf>4</inf>(41.45%) and higher than that of pure PCNS (71.78%) under the same conditions. The effects of initial TC concentration, catalyst dosage, pH value and different water sources have been studied in detail. The improved photocatalytic performance of the as-prepared PCNS/BiVO<inf>4</inf>nanocomposites could be attributed to the promoted separation efficiency of the photogenerated electrons and the enhanced charge carrier lifetime (1.65 ns) owing to the synergistic effect between the PCNS and BiVO<inf>4</inf>. The degradation intermediates and decomposition pathway of TC were also analyzed and proposed. Additionally, radical trapping experiments and ESR measurement indicated that the photogenerated holes (h<sup>+</sup>), superoxide radical (<sup>[rad]</sup>O<inf>2</inf><sup>−</sup>) and hydroxyl radical (<sup>[rad]</sup>OH) all participated in the TC removal procedure in the reaction system. The high performance of PCNS/BVO-400 in real wastewater indicated the potential of the prepared composite in practical application. This work provides an efficient and promising approach for the formation of high performance Z-scheme photocatalyst and study the possibility for real wastewater treatment. ©2017 Elsevier Inc.
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英文
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Electrochemical behavior and voltammetric determination of vanillin based on an acetylene black paste electrode modified with graphene-polyvinylpyrrolidone composite film
作者：
Deng, Peihong* ;Xu, Zhifeng;Zeng, Rongying;Ding, Chunxia
期刊：
Food Chemistry ,2015年180:156-163 ISSN：0308-8146
通讯作者：
Deng, Peihong
作者机构：
[Deng, Peihong; Xu, Zhifeng; Zeng, Rongying] Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.;[Zeng, Rongying] Hunan Agr Univ, Coll Resource & Environm, Changsha 410128, Hunan, Peoples R China.;[Ding, Chunxia] Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.
通讯机构：
[Deng, Peihong] Hengyang Normal Univ, Dept Chem & Mat Sci, Hengyang 421008, Peoples R China.
关键词：
Graphene–polyvinylpyrrolidone composite film;Electrochemical sensor;Vanillin;Electrochemical behavior;Voltammetric determination
摘要：
The graphene-polyvinylpyrrolidone composite film modified acetylene black paste electrode (GR-PVP/ABPE) was fabricated and used to determine vanillin. In 0.1 M H<inf>3</inf>PO<inf>4</inf> solution, the oxidation peak current of vanillin increased significantly at GR-PVP/ABPE compared with bare ABPE, PVP/ABPE and GR/ABPE. The oxidation mechanism was discussed. The experimental conditions that exert influence on the voltammetric determination of vanillin, such as supporting electrolytes, pH values, accumulation potential and accumulation time, were optimized. Besides, the interference, repeatability, reproducibility and stability measurements were also evaluated. Under the optimal experimental conditions, the oxidation peak current was proportional to vanillin concentration in the range of 0.02-2.0 μM, 2.0-40 μM and 40-100 μM. The detection limit was 10 nM. This sensor was used successfully for vanillin determination in various food samples. ©2015 Elsevier Ltd. All rights reserved.
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英文
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Comprehensive evaluation of the cytotoxicity of CdSe/ZnS quantum dots in Phanerochaete chrysosporium by cellular uptake and oxidative stress
作者：
Hu, Liang;Wan, Jia;Zeng, Guangming* ;Chen, Anwei* ;Chen, Guiqiu;Huang, Zhenzhen;He, Kai;Cheng, Min;Zhou, Chengyun;Xiong, Weiping;Lai, Cui;Xu, Piao
期刊：
Environmental Science: Nano ,2017年4(10):2018-2029 ISSN：2051-8153
通讯作者：
Zeng, Guangming;Chen, Anwei
作者机构：
[Lai, Cui; Zeng, Guangming; Xu, Piao; He, Kai; Wan, Jia; Chen, Guiqiu; Hu, Liang; Cheng, Min; Zhou, Chengyun; Xiong, Weiping; Huang, Zhenzhen] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Lai, Cui; Zeng, Guangming; Xu, Piao; He, Kai; Wan, Jia; Chen, Guiqiu; Hu, Liang; Cheng, Min; Zhou, Chengyun; Xiong, Weiping; Huang, Zhenzhen] Hunan Univ, Minist Educ, Key Lab Environm Biol & Pollut Control, Changsha 410082, Hunan, Peoples R China.;[Chen, Anwei] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.
通讯机构：
[Zeng, Guangming] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Zeng, Guangming] Hunan Univ, Minist Educ, Key Lab Environm Biol & Pollut Control, Changsha 410082, Hunan, Peoples R China.;[Chen, Anwei] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.
摘要：
The growing potential of quantum dots (QDs) in biological and biomedical applications has raised considerable concern due to their toxicological impact. Consequently, it is urgent to elucidate the underlying toxicity mechanism of QDs. In this work, we comprehensively investigated the cellular uptake of four CdSe/ZnS QDs (COOH CdSe/ZnS 525, COOH CdSe/ZnS 625, NH2 CdSe/ZnS 525, and NH2 CdSe/ZnS 625) and induced physiological responses in Phanerochaete chrysosporium (P. chrysosporium) through inductively coupled plasma optical emission spectroscopy, confocal laser scanning microscopy, and the determination of malondialdehyde content, superoxide level, superoxide dismutase activity, catalase activity and glutathione level. The results showed that the four CdSe/ZnS QDs accumulated largely in the hyphae and caused oxidative stress to P. chrysosporium in the tested concentration range (10–80 nM). Furthermore, the cellular uptake and cytotoxicity were related to the physicochemical properties of the QDs, such as particle size and surface charges. Negatively charged CdSe/ZnS QDs with small size could be more easily ingested by P. chrysosporium than large ones; thus small size CdSe/ZnS QDs were more cytotoxic to P. chrysosporium. On the other hand, small negatively charged CdSe/ZnS QDs resulted in greater cytotoxicity than large negatively charged CdSe/ZnS QDs. The obtained results offer valuable information for revealing the toxicity mechanism of QDs in living cells.
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英文
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Potential for control of harmful cyanobacterial blooms using biologically derived substances: Problems and prospects
作者：
Shao, Jihai;Li, Renhui;Lepo, Joe Eugene;Gu, Ji-Dong*
期刊：
Journal of Environmental Management ,2013年125:149-155 ISSN：0301-4797
通讯作者：
Gu, Ji-Dong
作者机构：
[Shao, Jihai] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.;[Shao, Jihai; Gu, Ji-Dong] Hunan Agr Univ, Hunan Prov Key Lab Farmland Pollut Control & Agr, Changsha 410128, Hunan, Peoples R China.;[Li, Renhui] Chinese Acad Sci, Inst Hydrobiol, Key Lab Algal Biol, Wuhan 430072, Peoples R China.;[Lepo, Joe Eugene] Univ W Florida, Dept Biol, Pensacola, FL 32514 USA.;[Lepo, Joe Eugene] Univ W Florida, Ctr Environm Diagnost & Bioremediat, Pensacola, FL 32514 USA.
通讯机构：
[Gu, Ji-Dong] Univ Hong Kong, Lab Environm Microbiol & Toxicol, Sch Biol Sci, Pokfulam Rd, Hong Kong, Hong Kong, Peoples R China.
关键词：
Cyanobacteria;Water blooms;Biologically originated substances;Algae removal
摘要：
Water blooms of cyanobacteria have posed a worldwide environmental threat and a human health hazard in recent decades. Many biologically derived (but non-antibiotic) bioactive substances are known to inhibit the growth of aquatic bloom-forming cyanobacteria. Some of these biologically derived substances (BDSs) have no or low toxicity to aquatic animals and humans. Most BDSs are easily biodegradable in aquatic environments. These characteristics indicate that they may have potential for control and removal of harmful algae. However, BDSs also have the disadvantages of high cost of preparation, and possible damage to non-target aquatic organisms, and sometimes, low efficiency of algae removal. The ecological risks of most BDSs are still unknown. Here, we review recent research progress relative to the inhibitory effects of BDSs on cyanobacteria, and critically analyze the potential of BDSs as algicides with an emphasis on possible problems during the process of controlling harmful cyanobacteria. We suggest avenues of study to enhance effective use of BDSs in controlling of cyanobacterial blooms; these include guidelines for isolation and characterization of new effective BDSs, exploiting the synergistic effects of BDSs, the merits of controlling harmful cyanobacteria at the early stages of proliferation and evaluation of ecological risks of BDSs. (C) 2013 Elsevier Ltd. All rights reserved.
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英文
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