Magnetic nitrogen-doped sludge-derived biochar catalysts for persulfate activation: Internal electron transfer mechanism
作者：
Yu, Jiangfang;Tang, Lin;Pang, Ya;Zeng, Guangming;Wang, Jiajia;Deng, Yaocheng;Liu, Yani;Feng, Haopeng;Chen, Song;Ren, Xiaoya
期刊：
Chemical Engineering Journal ,2019年364:146-159 ISSN：1385-8947
通讯作者：
Tang, L.
作者机构：
[Zeng, Guangming; Wang, Jiajia; Feng, Haopeng; Yu, Jiangfang; Tang, Lin; Liu, Yani; Ren, Xiaoya; Chen, Song] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Pang, Ya] Changsha Univ, Dept Biol & Environm Engn, Changsha 410003, Hunan, Peoples R China.;[Zeng, Guangming; Wang, Jiajia; Feng, Haopeng; Yu, Jiangfang; Tang, Lin; Liu, Yani; Ren, Xiaoya; Chen, Song] Hunan Univ, Minist Educ, Key Lab Environm Biol & Pollut Control, Changsha 410082, Hunan, Peoples R China.;[Deng, Yaocheng] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.
通讯机构：
College of Environmental Science and Engineering, Hunan University, Changsha, China
关键词：
Free radicals;Internal electron transfer;Persulfate;Sludge biochar;Sp2 and sp3 hybridization
摘要：
Persulfate-based advanced oxidation process is a powerful countermeasure for water remediation, where effective and low-cost catalysts are still needed. Herein, a one-pot synthetic method for magnetic nitrogen-doped sludge biochar (MS-biochar) was presented, which exhibited better catalytic property with PDS for tetracycline degradation than typical graphitic carbon (graphite powder, graphene oxide and multiwalled carbon nanotubes) and two other types biochars. EDAX manifested the uniform dispersion of elements in MS-biochar. Similar to “top-down” a research thought from whole to part of MS-biochar for contribution measurement was presented, where acid-soluble substance (ASS) was the most important contributor for MS-400/600 while carbon matrix (CM) was dominant for MS-800. Quenching and EPR demonstrated a free-radicals pathway in MS-biochar/PDS, where ASS mainly assumed to be effective for SO4[rad]− and CM was primarily committed to [rad]OH generation. EDAX, XPS and Raman studies proved three kinds of catalytic sites, namely the iron compounds, doped nitrogen and graphitic carbon. And their activating mechanism were discussed where one internal electron migration path (from sp3 to nanocrystalline sp2 carbon) has been first proposed. Reusability, metal leaching detection and pharmaceutical wastewater application indicated the potential of MS-biochar. This work not only presents a potential resource-based disposal of sewage sludge, a novel research thought from whole to part for materials performance measurement, but also provides guidance for carbon materials’ design for persulfate activation, especially for sp2 and sp3 co-hybridized carbons. © 2019 Elsevier B.V.
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英文
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Fluorescence chemosensors for hydrogen sulfide detection in biological systems
作者：
Guo, Zhi;Chen, Guiqiu* ;Zeng, Guangming;Li, Zhongwu;Chen, Anwei;Wang, Jiajia;Jiang, Longbo
期刊：
Analyst ,2015年140(6):1772-1786 ISSN：1364-5528
通讯作者：
Chen, Guiqiu
作者机构：
[Zeng, Guangming; Li, Zhongwu; Wang, Jiajia; Guo, Zhi; Chen, Guiqiu; Jiang, Longbo] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Zeng, Guangming; Li, Zhongwu; Wang, Jiajia; Guo, Zhi; Chen, Guiqiu; Jiang, Longbo] 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：
[Chen, Guiqiu] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.
摘要：
A comprehensive review of the development of H2S fluorescence-sensing strategies, including sensors based on chemical reactions and fluorescence resonance energy transfer (FRET), is presented. The advantages and disadvantages of fluorescence-sensing strategies are compared with those of traditional methods. Fluorescence chemosensors, especially those used in FRET sensing, are highly promising because of their low cost, technical simplicity, and their use in real-time sulfide imaging in living cells. Potential applications based on sulfate reduction to H2S, the relationship between sulfate-reducing bacteria activity and H2S yield, and real-time detection of sulfate-reducing bacteria activity using fluorescence sensors are described. The current challenges, such as low sensitivity and poor stability, are discussed.
语种：
英文
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The impact of silver nanoparticles on the co-composting of sewage sludge and agricultural waste: Evolutions of organic matter and nitrogen
作者：
Zhang, Lihua;Zeng, Guangming* ;Dong, Haoran;Chen, Yaoning;Zhang, Jiachao;Yan, Ming;Zhu, Yuan;Yuan, Yujie;Xie, Yankai;Huang, Zhenzhen
期刊：
Bioresource Technology ,2017年230:132-139 ISSN：0960-8524
通讯作者：
Zeng, Guangming
作者机构：
[Zhu, Yuan; Chen, Yaoning; Yuan, Yujie; Zeng, Guangming; Dong, Haoran; Xie, Yankai; Zhang, Lihua; Yan, Ming; Huang, Zhenzhen] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Zhu, Yuan; Chen, Yaoning; Yuan, Yujie; Zeng, Guangming; Dong, Haoran; Xie, Yankai; Zhang, Lihua; Yan, Ming; Huang, Zhenzhen] Hunan Univ, Key Lab Environm Biol & Pollut Control, Minist Educ, Changsha 410082, Hunan, Peoples R China.;[Zhang, Jiachao] Hunan Agr Univ, Coll Resources & Environm, Changsha 410082, 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：
AgNPs;Co-composting;Organic matter;Nitrogen
摘要：
This study evaluated the influence of silver nanoparticles (AgNPs) on evolutions of organic matter and nitrogen during co-composting of sewage sludge and agricultural waste. Two co-composting piles were conducted, one was treated without AgNPs (pile 1) and the other with AgNPs (pile 2). Results showed that the AgNPs affected the quality of final composts. Less organic matter (OM) losses were determined in pile 2 (57.96%) than pile 1 (61.66%). 27.22% and 30.1% of the initial total organic matter (TOC) was decomposed in pile 1 and pile 2, respectively. The final water soluble carbon (WSC) concentration in pile 2 was 23559.27 mg/kg DW compost which was significantly lower than pile 1 (25642.75 mg/kg DW compost). Changes of different forms of nitrogen in the two piles showed that AgNPs could reduce the losses of TN but increase the losses of mineral N. (C) 2017 Elsevier Ltd. All rights reserved.
语种：
英文
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Pollution, fractionation, and mobility of Pb, Cd, Cu, and Zn in garden and paddy soils from a Pb/Zn mining area
作者：
Lei, Ming;Zhang, Yong;Khan, Sardan;Qin, Pu-feng;Liao, Bo-han*
期刊：
Environmental Monitoring and Assessment ,2010年168(1-4):215-222 ISSN：0167-6369
通讯作者：
Liao, Bo-han
作者机构：
[Lei, Ming; Qin, Pu-feng; Zhang, Yong] Hunan Agr Univ, Coll Resource & Environm, Changsha 410128, Hunan, Peoples R China.;[Liao, Bo-han] Cent S Univ Forestry & Technol, Int Coll, Changsha 410004, Hunan, Peoples R China.;[Khan, Sardan; Lei, Ming] Chinese Acad Sci, Ecoenvironm Sci Res Ctr, Beijing 100085, Peoples R China.;[Khan, Sardan] Univ Peshawar, Dept Environm Sci, Peshawar 25120, Pakistan.
通讯机构：
[Liao, Bo-han] Cent S Univ Forestry & Technol, Int Coll, Changsha 410004, Hunan, Peoples R China.
关键词：
Contaminated soils;Fractionation distribution;Heavy metal;Leleyter and Probst's sequential extraction;Mobility;Pollution index
摘要：
This study was conducted to investigate the pollution load index, fraction distributions, and mobility of Pb, Cd, Cu, and Zn in garden and paddy soils collected from a Pb/Zn mine in Chenzhou City, China. The samples were analyzed using Leleyter and Probst's sequential extraction procedures. Total metal concentrations including Pb, Cd, Cu, and Zn exceeded the maximum permissible limits for soils set by the Ministry of Environmental Protection of China, and the order of the pollution index was Cd >Zn >Pb >Cu, indicating that the soils from both sites seriously suffered from heavy metal pollution, especially Cd. The sums of metal fractions were in agreement with the total contents of heavy metals. However, there were significant differences in fraction distributions of heavy metals in garden and paddy soils. The residual fractions of heavy metals were the predominant form with 43.0% for Pb, 32.3% for Cd, 33.5% for Cu, and 44.2% for Zn in garden soil, while 51.6% for Pb, 40.4% for Cd, 40.3% for Cu, and 40.9% for Zn in paddy soil. Furthermore, the proportions of water-soluble and exchangeable fractions extracted by the selected analytical methods were the lowest among all fractions. On the basis of the speciation of heavy metals, the mobility factor values of heavy metals have the following order: Cd (25.2-19.8%) >Cu (22.6-6.3%) >Zn (9.6-6.0%) >Pb (6.7-2.5%) in both contaminated soils. ©2009 Springer Science+Business Media B.V.
语种：
英文
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Carbon-based materials as adsorbent for antibiotics removal: Mechanisms and influencing factors
作者：
Xiang, Yujia;Xu, Zhangyi;Wei, Yuyi;Zhou, Yaoyu* ;Yang, Xiao;Yang, Yuan;Yang, Jian* ;Zhang, Jiachao;Luo, Lin;Zhou, Zhi
期刊：
Journal of environmental management ,2019年237:128-138 ISSN：0301-4797
通讯作者：
Zhou, Yaoyu;Yang, Jian
作者机构：
[Xu, Zhangyi; Wei, Yuyi; Xiang, Yujia; Yang, Yuan; Yang, Jian; Zhou, Yaoyu; Zhang, Jiachao; Zhou, YY; Yang, J; Luo, Lin] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.;[Xu, Zhangyi; Wei, Yuyi; Xiang, Yujia; Yang, Yuan; Yang, Jian; Zhou, Yaoyu; Zhang, Jiachao; Luo, Lin] Hunan Agr Univ, Hunan Int Sci & Technol Cooperat Base Agr Typ Pol, Changsha 410028, Hunan, Peoples R China.;[Zhou, Zhi] Hunan Agr Univ, Coll Sci, Changsha 410128, Hunan, Peoples R China.;[Zhou, Yaoyu; Yang, Xiao] Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hung Hom, Kowloon, Hong Kong, Peoples R China.
通讯机构：
[Zhou, YY; Yang, J] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.
关键词：
Adsorption;Adsorption mechanism;Antibiotics;Carbon-based materials;Influencing factors
摘要：
With the development of the removal of organic pollutants in the soil and water environment, antibiotics have been considered as emerging pollutants and received considerable attention among the scientific community. Thus, there is a need for an effective, economical, fast, operational feasible and environmental-friendly technology to remove antibiotics. Adsorption technology would be one of the most promising option on the basis that it best meets the criteria we set out above. From the most primitive activated carbon to the most innovative modified biochar, carbon-based materials have played a significant role in the adsorption process of antibiotics all the time. This paper reviews the adsorption behavior of some representative antibiotics (e.g., chloramphenicols, sulfonamides, tetracyclines, flouroquinolones) over various carbonaceous materials (i.e., activated carbon, carbon nanotubes, graphene, and biochar). Nevertheless, in addition to the structural characteristics and adsorption capacities of carbon-based materials, a special emphasis was placed on the underlying adsorption mechanisms and roles of different influencing factors in the adsorption process. Moreover, the knowledge gaps and research challenges have been highlighted, including design and optimization of the carbonaceous materials for antibiotics adsorption.
语种：
英文
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Synthesis and application of iron and zinc doped biochar for removal of p-nitrophenol in wastewater and assessment of the influence of co-existed Pb(II)
作者：
Wang, Pei;Tang, Lin* ;Wei, Xue;Zeng, Guangming* ;Zhou, Yaoyu;Deng, Yaocheng;Wang, Jingjing;Xie, Zhihong;Fang, Wei
期刊：
Applied Surface Science ,2017年392:391-401 ISSN：0169-4332
通讯作者：
Tang, Lin;Zeng, Guangming
作者机构：
[Zeng, Guangming; Xie, Zhihong; Deng, Yaocheng; Tang, Lin; Wang, Jingjing; Fang, Wei; Zhou, Yaoyu; Wang, Pei; Wei, Xue; Tang, L; Zeng, GM] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Zeng, Guangming; Xie, Zhihong; Deng, Yaocheng; Tang, Lin; Wang, Jingjing; Fang, Wei; Zhou, Yaoyu; Wang, Pei; Wei, Xue] 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.
通讯机构：
[Tang, L; Zeng, GM] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.
关键词：
Iron and zinc doped biochar;p-Nitrophenol;Pb(II);Adsorption;Complexing-bridging
摘要：
The modification of biochar as a low-cost adsorbent is essential to improve its surface properties and shows great potential in water decontamination. The iron and zinc doped sawdust biochar (Fe/Zn-biochar) with large apparent surface area (518.54 m(2)/g) proposed in this work showed good performance for p-nitrophenol (PNP) removal compared with the pristine biochar (P-biochar), iron doped biochar (Fe-biochar) and zinc doped biochar (Zn-biochar) respectively. The batch experiments turned out that Fe/Zn-biochar exhibited larger PNP adsorption capacity under acidic pH solution, and the ionic strength had slightly negative impact on PNP adsorption. The adsorption kinetics and isotherms were discussed, and the experimental data fitted well the Pseudo-second-order equation and Langmuir model. The thermodynamic study indicated that the PNP adsorption was a spontaneous endothermic process. Furthermore, the simultaneous removal for PNP and Pb(II) by Fe/Zn-biochar was investigated. It implied that the adsorption of PNP and Pb(II) at their low concentration might be enhanced by the complexing-bridging mechanism of PNP and Pb(II) ascribing to the affinity between PNP and hydrophobic sites, in addition to the affinity between Pb(II) and oxygen-containing hydrophilic sites on Fegn-biochar surface. However, the predominated competition between PNP and Pb(II) at their high concentrations with Fe/Zn-biochar suppressed their adsorption. (C) 2016 Elsevier B.V. All rights reserved.
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英文
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Current status of agricultural soil pollution by heavy metals in China: A meta-analysis
作者：
Huang, Ying;Wang, Lingyu;Wang, Wenjia;Li, Tingqiang;He, Zhenli;Yang, Xiaoe*
期刊：
The Science of the total environment ,2019年651(Pt 2):3034-3042 ISSN：0048-9697
通讯作者：
Yang, Xiaoe
作者机构：
[Wang, Wenjia; Li, Tingqiang; Huang, Ying; Yang, Xiaoe; Wang, Lingyu] Zhejiang Univ, Coll Environm & Resource Sci, Key Lab Environm Remediat & Ecol Hlth, Minist Educ, Hangzhou 310058, Zhejiang, Peoples R China.;[Huang, Ying] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.;[He, Zhenli] Univ Florida, Inst Food & Agr Sci, Indian River Res & Educ Ctr, Ft Pierce, FL 34945 USA.
通讯机构：
[Yang, Xiaoe] Zhejiang Univ, Coll Environm & Resource Sci, Key Lab Environm Remediat & Ecol Hlth, Minist Educ, Hangzhou 310058, Zhejiang, Peoples R China.
关键词：
Agricultural soil;Cropping systems;Heavy metal;Meta-analysis;Spatial distribution;Temporal accumulation
摘要：
In the last decades, agricultural soil pollution by heavy metals has been extensively investigated in China. However, nearly all studies were field monitoring in small regions and/or with limited samples, which may not represent soil pollution situation at the national scale. In this paper, attempt was made to provide a comprehensive report about heavy metal pollution in China based on meta-analysis of reviewed data. Given the characteristics of field monitoring studies, the weighted mean values based on "sampling number". "study area", and "standard deviation" were calculated to represent national mean values. In addition, subgroup analysis and cumulative meta-analysis were applied to explore the spatial and temporal variations as well as the influence of cropping systems. 336 articles published from 2005 to 2017 were reviewed in the analysis. Eight heavy metals (cadmium (Cd), chromium (Cr), mercury (Hg), lead (Pb), arsenic (As), copper (Cu), zinc (Zn) and nickel (Ni)) were analyzed. The contents of Cd and Hg were increased compared to background values, while, other six elements showed no significant accumulation. Little pollution was found in normal farmland, which was far from obvious anthropogenic emissions, but Cd and Hg in mining & smelting areas and industrial areas continued to accumulate significantly. Moreover, the accumulation had slowed down or decreased since 2012, which might be due to reduced use of coals, non-ferrous metals and agro-chemicals. Heavy metal contents were generally higher in southwest and south coastal areas but lower in northwest regions, whereas vegetable and paddy fields had higher concentrations than upland and other land use. This study provides information on soil pollution caused by heavy metals and its affected regions and cropping systems on a national scale. It can be useful for developing heavy metal pollution control and management strategies in China. (C) 2018 Elsevier B.V. All rights reserved.
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英文
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Aptamer-based biosensors for detection of lead(II) ion: a review
作者：
Yang, Danxing;Liu, Xiaocheng;Zhou, Yaoyu* ;Luo, Lin* ;Zhang, Jiachao;Huang, Anqi;Mao, Qiming;Chen, Xiao;Tang, Lin
期刊：
Analytical Methods ,2017年9(13):1976-1990 ISSN：1759-9660
通讯作者：
Zhou, Yaoyu;Luo, Lin
作者机构：
[Liu, Xiaocheng; Mao, Qiming; Zhou, YY; Luo, Lin; Zhou, Yaoyu; Zhang, Jiachao; Yang, Danxing; Huang, Anqi] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.;[Chen, Xiao] Hunan Agr Univ, Coll Sports & Art, Changsha 410128, Hunan, Peoples R China.;[Tang, Lin] Hunan Univ, Minist Educ, Key Lab Environm Biol & Pollut Control, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.
通讯机构：
[Zhou, YY; Luo, L] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.
摘要：
Lead(II) ion (Pb2+) contamination can be accumulated along the food chain and cause a serious threat to public health. Plenty of research effort has thus been devoted to the development of fast, sensitive and selective biosensors for monitoring Pb2+. Aptamer especially Pb2+ based DNAzymes (obtained from a large DNA library via in vitro selection) and DNA molecules are highly selective for a number of metal ions. Therefore, aptamer-based biosensors have been extensively studied for Pb2+ ion detection with a high sensitivity. In this review, we explain the current progress of Pb2+ aptamer-based sensors mainly in three groups: fluorescent; colorimetric; and electrochemical biosensors.
语种：
英文
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Insight into the dual-channel charge-charrier transfer path for nonmetal plasmonic tungsten oxide based composites with boosted photocatalytic activity under full-spectrum light
作者：
Deng, Yaocheng;Tang, Lin* ;Feng, Chengyang;Zeng, Guangming* ;Chen, Zhaoming;Wang, Jiajia;Feng, Haopeng;Peng, Bo;Liu, Yani;Zhou, Yaoyu
期刊：
Applied Catalysis B: Environmental ,2018年235:225-237 ISSN：0926-3373
通讯作者：
Tang, Lin;Zeng, Guangming
作者机构：
[Zeng, Guangming; Wang, Jiajia; Feng, Haopeng; Deng, Yaocheng; Tang, Lin; Chen, Zhaoming; Peng, Bo; Liu, Yani; Feng, Chengyang; 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; Chen, Zhaoming; Peng, Bo; Liu, Yani; Feng, Chengyang] 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, Changsha 410082, Hunan, Peoples R China.
关键词：
Tungsten oxide;Nonmetal plasmonic semiconductors;Z-scheme;Dual-channel process;Oxygen vacancies
摘要：
The photocatalytic activities of the semiconductor-based photocatalysts are often practically limited by the insufficient photoinduced charge-carrier separation, so the construction of efficient charge transfer path is vital for highly efficient photocatalysis reaction system. In this study, we reported a rational designed novel hierarchical W<inf>18</inf>O<inf>49</inf>/g-C<inf>3</inf>N<inf>4</inf>composite with boosted photocatalytic activity through the manipulated flow of dual-channel charge-carrier separation and transfer process. Due to the efficient strategy about the combination of the morphology structure and the regulation of band structure, the prepared composites present enhanced photocatalytic performance in both full-spectrum light and near-infrared (NIR) light irradiation. Under the optimum condition, the prepared W<inf>18</inf>O<inf>49</inf>/g-C<inf>3</inf>N<inf>4</inf>composites show high degradation efficiency for both colorful methylene blue (MB) and colorless ciprofloxacin (CIP). Mechanistic characterizations and control experiments demonstrate the cooperative synergy effect of dual-channel charge-carrier transfer path in such W<inf>18</inf>O<inf>49</inf>/g-C<inf>3</inf>N<inf>4</inf>composites, including Z-scheme charge transfer and surface plasmon resonance effect, which interactively leads to the boosted photocatalytic performance. The match of the band gap results in the Z-scheme reaction mechanism and brought both the strong redox ability and promotion of the transfer rate of the photogenerated charges;the LSPR effect of nonmetal plasmonic W<inf>18</inf>O<inf>49</inf>can broaden the light response of the prepared W<inf>18</inf>O<inf>49</inf>/g-C<inf>3</inf>N<inf>4</inf>to NIR region, leading to enhanced utilization of solar energy. Moreover, the oxygen vacancies in this reaction system which played important role in the photocatalytic process have been fully studied by the appropriate design of the control experiments.<br/> ©2018 Elsevier B.V.
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英文
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Highly Efficient Photoelectrochemical Hydrogen Generation Using ZnxBi2S3+x Sensitized Platelike WO3 Photoelectrodes
作者：
Liu, Canjun;Yang, Yahui;Li, Wenzhang* ;Li, Jie;Li, Yaomin;Shi, Qilin;Chen, Qiyuan
期刊：
ACS Applied Materials and Interfaces ,2015年7(20):10763-10770 ISSN：1944-8244
通讯作者：
Li, Wenzhang
作者机构：
[Li, Jie; Liu, Canjun; Li, Wenzhang; Shi, Qilin; Chen, Qiyuan] Cent S Univ, Sch Chem & Chem Engn, Changsha 410083, 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.;[Li, Wenzhang] Cent S Univ, Sch Chem & Chem Engn, 932 Lushan South Rd, Changsha 410083, Peoples R China.
通讯机构：
[Li, Wenzhang] Cent S Univ, Sch Chem & Chem Engn, 932 Lushan South Rd, Changsha 410083, Peoples R China.
关键词：
photoelectrochemical;hydrogen generation;WO3;Bi2S3;ZnS
摘要：
Zn<inf>x</inf>Bi<inf>2</inf>S<inf>3+x</inf>sensitized platelike WO<inf>3</inf>photoelectrodes on FTO substrates were for the first time prepared via a sequential ionic layer adsorption reaction (SILAR) process. The samples were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), ultraviolet visible spectrometry (UV-vis), and Raman spectra. The results show that the Zn<inf>x</inf>Bi<inf>2</inf>S<inf>3+x</inf>quantum dots (QDs) are uniformly coated on the entire surface of WO<inf>3</inf>plates, forming a WO<inf>3</inf>/Zn<inf>x</inf>Bi<inf>2</inf>S<inf>3+x</inf>core/shell structure. The Zn<inf>x</inf>Bi<inf>2</inf>S<inf>3+x</inf>/WO<inf>3</inf>films show a superior ability to capture visible light. High-efficiency photoelectrochemical (PEC) hydrogen generation is demonstrated using the prepared electrodes as photoanodes in a typical three-electrode electrochemical cell. Compared to the Bi<inf>2</inf>S<inf>3</inf>/WO<inf>3</inf>photoelectrodes, the Zn<inf>x</inf>Bi<inf>2</inf>S<inf>3+x</inf>/WO<inf>3</inf>photoelectrodes exhibit good photostability and excellent PEC activity, and the photocurrent density is up to 7.0 mA cm<sup>-2</sup>at -0.1 V versus Ag/AgCl under visible light illumination. Investigation of the electron transport properties of the photoelectrodes shows that the introduction of ZnS enhances the photoelectrons' transport rate in the photoelectrode. The high PEC activity demonstrates the potential of the Zn<inf>x</inf>Bi<inf>2</inf>S<inf>3+x</inf>/WO<inf>3</inf>film as an efficient photoelectrode for hydrogen generation. (Chemical Presented). ©2015 American Chemical Society.
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英文
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Heavy metal pollution and potential health risk assessment of white rice around mine areas in Hunan Province, China
作者：
Lei, Ming* ;Tie, Bai-qing;Song, Zheng-guo;Liao, Bo-Han;Lepo, Joe Eugene;Huang, Yi-zong
期刊：
Food Security ,2015年7(1):45-54 ISSN：1876-4517
通讯作者：
Lei, Ming
作者机构：
[Tie, Bai-qing; Lei, Ming] Hunan Agr Univ, Coll Resource & Environm, Changsha 410128, Hunan, Peoples R China.;[Song, Zheng-guo; Huang, Yi-zong] Minist Agr, Key Lab Prod Environm & Agroprod Safety, Tianjin 300191, Peoples R China.;[Liao, Bo-Han] Cent South Univ Forestry & Technol, Coll Forestry, Changsha, Hunan, Peoples R China.;[Lepo, Joe Eugene] Univ W Florida, Ctr Environm Diagnost & Bioremediat, Pensacola, FL 32514 USA.;[Huang, Yi-zong] Chinese Acad Sci, Ecoenvironm Sci Res Ctr, Beijing, Peoples R China.
通讯机构：
[Lei, Ming] Hunan Agr Univ, Coll Resource & Environm, 1 Rong Da Rd, Changsha 410128, Hunan, Peoples R China.
关键词：
Heavy metal;Hunan province;Mining-affected area;Paddy soil;Potential health risk;White rice
摘要：
To assess the pollution situation and human health risks, the concentrations of heavy metals Pb, Cd, Cu, and Zn in paddy soils and white rice around seven mining-affected areas in Hunan Province were analyzed. The ranges of concentrations of Pb (23.9–1595.8 mg kg−1), Cd (0.3–9.5 mg kg−1), Cu (31.2–321.5 mg kg−1) and Zn (56.1–3478.9 mg kg−1) in all paddy soils were significantly higher than Hunan background values and even exceeded the maximum permissible concentrations for paddy soil quality recommended by the Ministry of Environmental Protection of China. The geoaccumulation index (I-geo) showed that Cd (1.42–6.33) was the predominant pollutant in all paddy soils, while Zn was the least important element. The concentrations of Pb, Cd, Cu, and Zn in white rice ranged from 0.18 to 0.72 mg kg−1, 0.10 to 1.32 mg kg−1, 3.83 to 5.95 mg kg−1, and 8.64 to 18.18 mg kg−1, respectively. Human health risk, associated with these heavy metals, was assessed based on hazard quotients (HQ) and hazard indexes (HI) for adults through consumption of white rice. HQ values of heavy metals (except for Cd) in most of mining-affected areas were below 1.0, while the HI of all heavy metals in all mine areas was higher than 1.0, the maximum acceptable level, suggesting that consumption of such contaminated white rice was a health risk. Except for the Leng Shui-Jiang mine area, Cd was the major contributor to the risk in the mine areas through white rice consumption, amounting to over 67 % of the HI, while Zn was a minimal contributor compared to the other metals. © 2015, Springer Science+Business Media Dordrecht and International Society for Plant Pathology.
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Practical and regenerable electrochemical aptasensor based on nanoporous gold and thymine-Hg2+-thymine base pairs for Hg2+ detection
作者：
Zeng, Guangming* ;Zhang, Chen;Huang, Danlian* ;Lai, Cui;Tang, Lin;Zhou, Yaoyu;Xu, Piao;Wang, Hou;Qin, Lei;Cheng, Min
期刊：
Biosensors and Bioelectronics ,2017年90:542-548 ISSN：0956-5663
通讯作者：
Zeng, Guangming;Huang, Danlian
作者机构：
[Huang, Danlian; Lai, Cui; Zeng, Guangming; Zeng, GM; Huang, DL; Tang, Lin; Xu, Piao; Wang, Hou; Zhang, Chen; Zhou, Yaoyu; Qin, Lei; Cheng, Min] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Huang, Danlian; Lai, Cui; Zeng, Guangming; Tang, Lin; Xu, Piao; Wang, Hou; Zhang, Chen; Zhou, Yaoyu; Qin, Lei; Cheng, Min] 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.
通讯机构：
[Zeng, GM; Huang, DL] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.
关键词：
Hg2+;Nanoporous gold;Electrochemistry;Thymine-Hg2+-thymine;Amplification
摘要：
A simple, practical and reusable electrochemical aptasensor, based on thymine-Hg<sup>2+</sup>-thymine (T-Hg<sup>2+</sup>-T) coordination chemistry and nanoporous gold (NPG) for signal amplification, was designed for sensitive and selective detection of mercury ions (Hg<sup>2+</sup>). The thiol modified T-rich hairpin capture probe was self-assembled onto the surface of the NPG modified electrode for hybridizing with ferrocene-labeled T-rich probe in the presence of Hg<sup>2+</sup>via T-Hg<sup>2+</sup>-T coordination chemistry. As a result, the hairpin capture probe was opened, and the ferrocene tags were close to the NPG modified electrode. Taking advantage of the amplification effect of NPG electrode for increasing the reaction sites of thiol modified capture probe, the proposed electrochemical aptasensor could detect Hg<sup>2+</sup>quantitatively in the range of 0.01–5000 nM, with a detection limit as low as 0.0036 nM which is much lower than the maximum contamination level for Hg<sup>2+</sup>in drinking water defined by the U.S. Environmental Protection Agency. Moreover, the proposed electrochemical aptasensor can be regenerated by adding cysteine and Mg<sup>2+</sup>. The aptasensor was also used to detect Hg<sup>2+</sup>from real water samples, and the results showed excellent agreement with the values determined by atomic fluorescence spectrometer. This aptasensor showed a promising potential for on-site detecting Hg<sup>2+</sup>in drinking water. ©2016 Elsevier B.V.
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Risk assessment and sources of polycyclic aromatic hydrocarbons in agricultural soils of Huanghuai plain, China
作者：
Yang, Bing;Xue, Nandong* ;Zhou, Lingli;Li, Fasheng;Cong, Xin;Han, Baolu;Li, Huiying;Yan, Yunzhong;Liu, Bo
期刊：
Ecotoxicology and Environmental Safety ,2012年84:304-310 ISSN：0147-6513
通讯作者：
Xue, Nandong
作者机构：
[Xue, Nandong; Li, Fasheng; Li, Huiying; Liu, Bo; Yang, Bing; Han, Baolu; Zhou, Lingli; Yan, Yunzhong] Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China.;[Liu, Bo; Han, Baolu] Hunan Agr Univ, Dept Environm & Recourses, Changsha 410128, Hunan, Peoples R China.;[Cong, Xin] Liaoning Tech Univ, Coll Resource & Environm Engn, Fuxing 123000, Peoples R China.;[Xue, Nandong] Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, 8 DaYangFang AnWai, Beijing 100012, Peoples R China.
通讯机构：
[Xue, Nandong] Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, 8 DaYangFang AnWai, Beijing 100012, Peoples R China.
关键词：
Polycyclic aromatic hydrocarbons (PAHs);Agricultural soil;Risk assessment;Principal component analysis
摘要：
The profiles and sources of polycyclic aromatic hydrocarbons (PAHs) were analyzed in 227 agricultural surface soils from the Huanghuai plain, China. The total concentrations of 16 PAHs varied from 15.7 to 1247.6 mu g/kg, with an average of 129.5 mu g/kg. Compared with pollution level and carcinogenic potential risk in other research, the soil PAH concentrations in this study fell within low to middle level. Unexpectedly, a significant correlation was not observed between the PAH concentration in soils and the corresponding content of the soil organic matter. This is partly interpreted for our sampling sites located in agricultural area where fresh input of organic fertilizers is expected. Principal component analysis-multiple linear regression suggests that low temperature combustion, coal combustion and traffic emissions could be the primary PAH contributors in soils from the Huanghuai plain, accounting for 46.7 percent, 42.1 percent and 11.2 percent of PAH concentrations, respectively. (C) 2012 Elsevier Inc. All rights reserved.
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英文
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Atmospheric dry and wet nitrogen deposition on three contrasting land use types of an agricultural catchment in subtropical central China
作者：
Shen, Jianlin;Li, Yong* ;Liu, Xuejun;Luo, Xiaosheng;Tang, Hong;Zhang, Yangzhu;Wu, Jinshui
期刊：
Atmospheric Environment ,2013年67:415-424 ISSN：1352-2310
通讯作者：
Li, Yong
作者机构：
[Wu, Jinshui; Li, Yong; Tang, Hong; Shen, Jianlin] Chinese Acad Sci, Changsha Res Stn Agr & Environm Monitoring, Inst Subtrop Agr, Changsha 410125, Hunan, Peoples R China.;[Wu, Jinshui; Li, Yong; Tang, Hong; Shen, Jianlin] Chinese Acad Sci, Key Lab Agroecol Proc Subtrop Reg, Inst Subtrop Agr, Changsha 410125, Hunan, Peoples R China.;[Liu, Xuejun; Luo, Xiaosheng] China Agr Univ, Coll Resources & Environm Sci, Beijing 100193, Peoples R China.;[Zhang, Yangzhu; Tang, Hong] Hunan Agr Univ, Coll Resources & Environm Sci, Changsha 410128, Hunan, Peoples R China.
通讯机构：
[Li, Yong] Chinese Acad Sci, Changsha Res Stn Agr & Environm Monitoring, Inst Subtrop Agr, Changsha 410125, Hunan, Peoples R China.
关键词：
NH3;NO2;HNO3;Ammonium;Nitrate;Nitrogen deposition
摘要：
Atmospheric emissions of reactive nitrogen (N) species are at high levels in China in recent years, but few studies have employed N deposition monitoring techniques that measure both dry and wet deposition for comprehensive evaluation of the impacts of N deposition on ecosystems. In this study, to quantify the total N deposition, both dry and wet N depositions were monitored using denuder/filter pack systems, passive samplers and wet-only samplers at three sites with different land use types (forest, paddy field and tea field) in a 135-km<sup>2</sup> catchment in subtropical central China from September 2010 to August 2011. At the three sampling sites, the annual mean concentrations of total N (the sum of NH4+, NO3- and DON) in rainwater were 1.2-1.6 mg N L<sup>-1</sup>, showing small variation across sites. Annual mean concentrations of total N (the sum of NH<inf>3</inf>, NO<inf>2</inf>, HNO<inf>3</inf>, particulate NH4+ and NO3-) in the air were 13-18 μg N m<sup>-3</sup>. High NH<inf>3</inf> concentrations in the air were observed at the agricultural sites of tea and paddy fields, indicating significant NH<inf>3</inf> emissions from N fertiliser application;and high NO<inf>2</inf> concentrations were found at the upland sites of forest and tea field, suggesting high NO emissions from soils due to high N deposition or high N fertiliser input. The annual total N deposition for the three sites of paddy field, tea field and forest was estimated as 22, 34 and 55 kg N ha<sup>-1</sup> yr<sup>-1</sup>, in which the dry N deposition components contributed to 21%, 36% and 63% of the annual total N deposition, respectively. The annual deposition of reduced N species was 1.1-1.8 times of the annual deposition of oxidised N species. To minimise the adverse effects of atmospheric N deposition on natural/semi-natural ecosystems, it is crucial to reduce the reactive N emissions from anthropogenic activities (e.g., N fertiliser application, animal production and fossil fuel combustion) in subtropical central China. ©2012 Elsevier Ltd.
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英文
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Remediation of Cu, Pb, Zn and Cd-contaminated agricultural soil using a combined red mud and compost amendment
作者：
Zhou, Rui;Liu, Xiaochen;Luo, Lin* ;Zhou, Yaoyu* ;Wei, Jianhong* ;Chen, Anwei;Tang, Lin;Wu, Haipeng;Deng, Yaocheng;Zhang, Fengfeng;Wang, Yangyang
期刊：
International Biodeterioration and Biodegradation ,2017年118:73-81 ISSN：0964-8305
通讯作者：
Luo, Lin;Zhou, Yaoyu;Wei, Jianhong
作者机构：
[Zhou, Rui; Zhang, Fengfeng; Luo, Lin; Zhou, YY; Liu, Xiaochen; Zhou, Yaoyu; Chen, Anwei] 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.;[Deng, Yaocheng; Tang, Lin; Zhou, Yaoyu] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Wu, Haipeng] Changjiang River Sci Res Inst, Wuhan 430010, Peoples R China.;[Wang, Yangyang] Henan Univ, Inst Nat Resources & Environm, Kaifeng 475004, Peoples R China.
通讯机构：
[Luo, L; Zhou, YY] 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：
Red mud;Compost;Remediation;Heavy metals;Metal toxicity;Metal mobility;Agricultural soils
摘要：
Red mud and compost are two inexpensive and effective materials available for the in situ treatment of soil contaminated with heavy metals. In order to investigate the specific process involved, a detailed analysis of the synergistic effects of combined red mud and compost was carried out. The efficiency of three different treatment systems, namely compost (C), red mud (R), and a mixture of compost and red mud (R + C), on the movability, ecological risk, and biological effective Cu, Zn, Cd, and Pb over time of incubation in agricultural soil was evaluated. Results showed that the pH, water extractable organic carbon (WEOC) and total organic carbon (TOC) showed significant changes after addition of these amendment materials to the target soil. The combination of red mud and compost mixture as amendment material (R + C) resulted in the largest reduction in efficiency of the available heavy metals. In addition, the microbial biomass in the treated soil increased after addition of the amendment materials, highest increase was observed with R + C. The results indicate that these amendment materials, especially R + C could lower the ecological risk of heavy metals in soil. ©2017 Elsevier Ltd
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英文
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Selenium contamination, consequences and remediation techniques in water and soils: A review
作者：
He, Yangzhuo;Xiang, Yujia;Zhou, Yaoyu* ;Yang, Yuan;Zhang, Jiachao* ;Huang, Hongli;Shang, Cui;Luo, Lin;Gao, Jun;Tang, Lin
期刊：
Environmental Research ,2018年164:288-301 ISSN：0013-9351
通讯作者：
Zhou, Yaoyu;Zhang, Jiachao
作者机构：
[Xiang, Yujia; Yang, Yuan; Shang, Cui; He, Yangzhuo; Zhou, Yaoyu; Zhou, YY; Zhang, Jiachao; Huang, Hongli; Luo, Lin; Gao, Jun] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.;[Tang, Lin] 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：
Selenium;Contamination;Remediation
摘要：
Selenium (Se) contamination in surface and ground water in numerous river basins has become a critical problem worldwide in recent years. The exposure to Se, either direct consumption of Se or indirectly may be fatal to the human health because of its toxicity. The review begins with an introduction of Se chemistry, distribution and health threats, which are essential to the remediation techniques. Then, the review provides the recent and common removal techniques for Se, including reduction techniques, phytoremediation, bioremediation, coagulation-flocculation, electrocoagulation (EC), electrochemical methods, adsorption, coprecipitation, electrokinetics, membrance technology, and chemical precipitation. Removal techniques concentrate on the advantages, drawbacks and the recent achievements of each technique. The review also takes an overall consideration of experimental conditions, comparison criteria and economic aspects.
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英文
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Synthesis of nanoscale zero-valent iron immobilized in alginate microcapsules for removal of Pb(ii) from aqueous solution
作者：
Luo, Si;Lu, Tingting;Peng, Liang;Shao, Jihai;Zeng, Qingru;Gu, Ji-Dong*
期刊：
Journal of Materials Chemistry A ,2014年2(37):15463-15472 ISSN：2050-7488
通讯作者：
Gu, Ji-Dong
作者机构：
[Luo, Si; Peng, Liang; Shao, Jihai; Zeng, Qingru; Gu, Ji-Dong; Lu, Tingting] 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, Ji-Dong] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.
摘要：
Alginate microcapsules immobilized nanoscale zero-valent iron (M-NZVI), with diameters from several hundreds nanometers to several micrometers, were synthesized using ferric and calcium ions as the cross-linking cations, and then tested for removal of Pb(ii) from aqueous solution. The size of NZVI particles was only a few nanometers according to transmission electron microscopy (TEM) observation. The synthesized alginate microcapsules were stable in air for as long as they were dried and contained 9.97% of iron by weight. When 0.5 g L <sup>-1</sup> of M-NZVI were introduced into an aqueous solution containing 300.0 mg L<sup>-1</sup> of Pb(ii), 88% of Pb(ii), 581.7 mg g<sup>-1</sup> of Pb(ii) uptake amount were removed from the system in 15 min. The kinetics of the removal reactions, including an initial adsorption phase and a subsequent reduction, is complicated. In addition, the synthesized M-NZVI showed a higher removal capability of Pb compared to NZVI and Ca-alginate particles. This newly synthesized material could be regenerated and reused at least 4 times when the initial concentrations of Pb(ii) were ≤200.0 mg L<sup>-1</sup>. The higher reaction rates and greater removal capacity suggest that M-NZVI may be a potential material for in situ remediation of metal contaminated water and sediments. ©the Partner Organisations 2014.
语种：
英文
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Enhancing photoelectrochemical water splitting by aluminum-doped plate-like WO3 electrodes
作者：
Li, Wenzhang;Zhan, Faqi;Li, Jie* ;Liu, Canjun;Yang, Yanghui;Li, Yaomin;Chen, Qiyuan
期刊：
Electrochimica Acta ,2015年160:57-63 ISSN：0013-4686
通讯作者：
Li, Jie
作者机构：
[Zhan, Faqi; Li, Jie; Liu, Canjun; Li, Wenzhang; Chen, Qiyuan] Cent S Univ, Sch Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China.;[Yang, Yanghui] 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, Jie] Cent S Univ, Sch Chem & Chem Engn, Changsha 410083, Hunan, Peoples R China.
关键词：
Plate-like tungsten oxide;aluminum-doped;water splitting;photoelectrochemistry
摘要：
In the present work, aluminum-doped plate-like tungsten oxide (WO<inf>3</inf>) photoelectrodes were investigated by photoelectrochemical methods in order to evaluate the possibility of their application in water splitting. The aluminum-doped plate-like WO<inf>3</inf> films were prepared by hydrothermal method in nitric acid from a radio frequency (RF) magnetron sputtered aluminum-tungsten layer on fluorine-doped tin oxide (FTO) glass. The crystal structure, composition and morphology of pure and aluminum-doped WO<inf>3</inf> were compared using x-ray diffraction (XRD), x-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results indicate that aluminum can be doped into WO<inf>3</inf> plate-like photoelectrodes by placing radio frequency magnetron sputtered aluminum-tungsten films using a facile hydrothermal method. Plate-like WO<inf>3</inf> films doped with 0.77 atom% aluminum showed photocurrent density of 1.14 mA/cm<sup>2</sup> at 1.2 V vs. Ag/AgCl, which was 1.3 times higher than that of the pure WO<inf>3</inf> (0.87 mA/cm<sup>2</sup>). Incident photon to current efficiency (IPCE) measurements carried out on photoelectrochemical (PEC) cell with aluminum-doped WO<inf>3</inf> plate-like photoelectrodes as anodes demonstrated a significant increase of photoresponse in the intrinsic absorption range. Electrochemical impendence spectroscopy (EIS) showed that aluminum-doped WO<inf>3</inf> possessed higher charge transfer rate and electrical conductivity than those of pristine WO<inf>3</inf>, thus presented a better performance in photoelectrochemical properties. ©2015 Elsevier Ltd. All rights reserved.
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英文
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Carbon disulfide-modified magnetic ion-imprinted chitosan-Fe(III): A novel adsorbent for simultaneous removal of tetracycline and cadmium
作者：
Chen, Anwei;Shang, Cui;Shao, Jihai* ;Lin, Yiqing;Luo, Si;Zhang, Jiachao;Huang, Hongli;Lei, Ming;Zeng, Qingru
期刊：
Carbohydrate Polymers ,2017年155:19-27 ISSN：0144-8617
通讯作者：
Shao, Jihai
作者机构：
[Luo, Si; Shang, Cui; Lin, Yiqing; Shao, Jihai; Zeng, Qingru; Zhang, Jiachao; Chen, Anwei; Lei, Ming; Huang, Hongli] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.
通讯机构：
[Shao, Jihai] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.
关键词：
Acetic acid (PubChem CID: 176);Adsorption;Cadmium;Cadmium nitrate tetrahydrate (PubChem CID: 56924536);Carbon disulfide (PubChem CID: 6348);Chitosan;Chitosan (PubChem CID: 71853);Combined pollution;EDTA (PubChem CID: 6049);Glutaraldehyde (PubChem CID: 3485);Ion-imprinted;Tetracycline;Tetracycline hydrochloride (PubChem CID: 54704426)
摘要：
A novel composite of carbon disulfide-modified magnetic ion-imprinted chitosan-Fe(III), i.e., MMIC-Fe(III) composite, was prepared as an efficient adsorbent for the simultaneous removal of tetracycline (TC) and Cd(II). This adsorbent showed excellent performance in removing TC and Cd(II) due to its rapid kinetics, high adsorption capacity, good reusability, and was well suited for use with real water samples. Kinetics studies demonstrated that the adsorption proceeded according to a pseudo-second order model. The adsorption isotherms were well described by the Langmuir model, with maximum adsorption capacity for TC and Cd(II) being 516.29 and 194.31 mg/g, respectively. The synergistic effect of TC and Cd(II) adsorption might be due to the formation of TC-Cd(II) complex bridging the adsorbate and adsorbent. These properties demonstrate the potential application of MMIC-Fe(III) for the simultaneous removal of TC and Cd(II), and may provide some information for the synergistic removal of antibiotics and heavy metals from aquatic environments.
语种：
英文
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Advancement of Ag–Graphene Based Nanocomposites: An Overview of Synthesis and Its Applications
作者：
He, Kai;Zeng, Zhuotong;Chen, Anwei;Zeng, Guangming* ;Xiao, Rong* ;Xu, Piao;Huang, Zhenzhen;Shi, Jiangbo;Hu, Liang;Chen, Guiqiu
期刊：
Small ,2018年14(32):e1800871 ISSN：1613-6810
通讯作者：
Zeng, Guangming;Xiao, Rong
作者机构：
[Zeng, Guangming; Xu, Piao; He, Kai; Chen, Guiqiu; Hu, Liang; Shi, Jiangbo; Huang, Zhenzhen] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Zeng, Guangming; Xu, Piao; He, Kai; Chen, Guiqiu; Hu, Liang; Shi, Jiangbo; Huang, Zhenzhen] Minist Educ, Key Lab Environm Biol & Pollut Control, Changsha 410082, Hunan, Peoples R China.;[Zeng, Zhuotong; Xiao, Rong] Cent S Univ, Xiangya Hosp 2, Dept Dermatol, Changsha 410011, 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] Minist Educ, Key Lab Environm Biol & Pollut Control, Changsha 410082, Hunan, Peoples R China.;[Xiao, Rong] Cent S Univ, Xiangya Hosp 2, Dept Dermatol, Changsha 410011, Hunan, Peoples R China.
关键词：
antimicrobial agents;catalysts;graphene;hybridization;sensors;silver nanoparticles
摘要：
Graphene has been employed as an excellent support for metal nanomaterials because of its unique structural and physicochemical properties. Silver nanoparticles (AgNPs) with exceptional properties have received considerable attention in various fields;however, particle aggregation limits its application. Therefore, the combination of AgNPs and graphene based nanocomposites (Ag–graphene based nanocomposites) has been widely explored to improve their properties and applications. Excitingly, enhanced antimicrobial, catalytic, and surface enhanced Raman scattering properties are obtained after their combination. In order to have a comprehensive knowledge of these nanocomposites, this Review highlights the chemical and biological synthesis of Ag–graphene nanocomposites. In particular, their applications as antimicrobial agents, catalysts, and sensors in biomedicine, agricultural protection, and environmental remediation and detection are covered. Meanwhile, the factors that influence the synthesis and applications are also briefly discussed. Furthermore, several important issues on the challenges and new directions are also provided for further development of these nanocomposites.<br/> ©2018 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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