Exploring the interaction between Cry1Ac protein and Zn2+, Cd2+ metal ions by fluorescence quenching and molecular docking approaches
作者：
Wang, Li;Liang, Yun-Shan;Wu, Zhi-Bin;Liu, Yi-Song;Xiao, Yun-Hua;...
期刊：
Chemosphere ,2022年297:134105 ISSN：0045-6535
通讯作者：
Liang, YS
作者机构：
[Gao, Rong; Liang, Yun-Shan; Wang, Li; Wu, Ai Ping; Hu, Teng; Liang, YS; Liu, Jiao; Wu, Zhi-Bin] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Peoples R China.;[Gao, Rong; Liang, Yun-Shan; Wang, Li; Wu, Ai Ping; Hu, Teng; Liu, Jiao; Wu, Zhi-Bin] Hunan Prov Key Lab Rural Ecosyst Hlth Dongting La, Changsha 410128, Peoples R China.;[Liu, Yi-Song] Hunan Agr Univ, Coll Vet Med, Changsha 410128, Peoples R China.;[Liu, Yi-Song] Natl & Local Union Engn Res Ctr Vet Herbal Med Re, Changsha 410128, Peoples R China.;[Xiao, Yun-Hua; Fang, Jun] Hunan Agr Univ, Coll Biosci & Biotechnol, Changsha 410128, Peoples R China.
通讯机构：
[Liang, YS ] H;Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Peoples R China.
关键词：
Binding mechanism;Cry1Ac protein;Fluorescence spectroscopy;Metal ions;Molecular docking
摘要：
Bacillus Thuringiensis (Bt) protein has a strong ability to complex with metal ions, which may increase the transport of metal ions in the soil multi-media system. In this study, the interactions between Cry1Ac protein and metal ions (Zn2+ and Cd2+) were investigated through spectroscopies and molecular docking methods. The spectra results showed that both Zn2+ and Cd2+ quenched the fluorescence intensity of Cry1Ac protein through the static quenching. The binding constants with 4–5 orders of magnitude also indicated the interactions between the ions and the Cry1Ac protein. The thermodynamic analysis showed that hydrogen bonds and van der Waals forces were predominant during the processes. In terms of the Förster non-radiation energy transfer theory, the binding distances between metal ions and Cry1Ac protein were approximately 0.21–0.24 nm, indicating the existence of a non-radiative energy transfer between them. Furthermore, molecular docking revealed that the metal ions participated in ligand binding with the Cry1Ac at the locations Asp569, Thr560, Asn564 and Gln566. The present work provided reasonable models helping us further understand the transport effect of heavy metals in the presence of Cry1Ac. The results could provide mechanistic insights into the nature of metal ions-Cry1Ac interactions and offer important information on the toxicity risk of metal ions-Cry1Ac binding interactions. © 2022 Elsevier Ltd
语种：
英文
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Single-Atom Catalysts for Hydrogen Generation: Rational Design, Recent Advances, and Perspectives
作者：
Zhang, Chenyu;Wang, Hou;Yu, Hanbo;Yi, Kaixin;Zhang, Wei;...
期刊：
Advanced Energy Materials ,2022年12(27):2200875- ISSN：1614-6832
通讯作者：
Huang, Jinhui(huangjinhui@hnu.edu.cn);Zeng, Guangming(zgming@hnu.edu.cn);Deng, Yaocheng(dengyaocheng@hunau.edu.cn)
作者机构：
[Zeng, Guangming; Yuan, Xingzhong; Yi, Kaixin; Zhang, Wei; Wang, Hou; Yu, Hanbo; Huang, Jinhui; Zhang, Chenyu] Hunan Univ, Coll Environm Sci & Engn, Changsha 410082, Hunan, Peoples R China.;[Deng, Yaocheng] Hunan Agr Univ, Coll Resources & Environm, Changsha 410082, Hunan, Peoples R China.
通讯机构：
[Jinhui Huang; Yaocheng Deng; Guangming Zeng] C;College of Resources and Environment, Hunan Agricultural University, Changsha, 410082 P. R. China<&wdkj&>College of Environmental Science and Engineering, Hunan University, Changsha, 410082 P. R. China
关键词：
active site immobilization;electro-/photo-chemical hydrogen evolution;single-atom catalysts;structure–performance relationship;surface chemistry
摘要：
Hydrogen is widely believed to be a promising fuel to solve the global energy crisis and environmental issues. The catalytic system represented by metal-supported catalysts is an important process of upgrading the hydrogen source in industry. Single-atom catalysts (SACs), which inherit the advantages of homogeneous and heterogeneous catalysts, provide a broad prospect for low-cost H2 production technology. This review focuses on the potential mechanisms in the rational design of SACs, including active sites, coordination configuration, mass loading, heteroatom-doping, and metal−support interaction. The design strategies of single metal atoms on different supports are reviewed to give a proposal on how to immobilize the atomic active sites and modulate the geometric/electronic structures of SACs. Subsequently, the synergistic effect in SACs and the dynamic evolution of the atomically dispersed heterometal catalysts are introduced, aiming to provide further guidelines for H2 evolution SACs. H2 generation from the water−gas shift reaction and electro-/photocatalytic water splitting are the main research directions at present. The latest progress of SACs employed in these applications is thoroughly reviewed. At the end of this review, personal perspectives on the prospects and challenges of H2 evolution SACs are put forward, hoping to promote the rapid development of SACs toward superior H2 evolution performance. © 2022 Wiley-VCH GmbH.
语种：
英文
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Effects of environmental and agronomic factors on pond water quality within an intensive agricultural landscape in subtropical southern China
作者：
Meng, Cen;Liu, Huanyao;Li, Yuyuan;Shen, Jianlin;Li, Xi;...
期刊：
Agricultural Water Management ,2022年274:107953 ISSN：0378-3774
通讯作者：
Li, Yuyuan(liyy@isa.ac.cn)
作者机构：
[Li, Yuyuan; Wu, Jinshui; Li, Xi; Meng, Cen; Shen, Jianlin] Chinese Acad Sci, Inst Subtrop Agr, Key Lab Agroecol Proc Subtrop Reg, Changsha 410125, Peoples R China.;[Li, Yuyuan; Wu, Jinshui; Li, Xi; Meng, Cen; Shen, Jianlin] Chinese Acad Sci, Inst Subtrop Agr, Changsha Res Stn Agr & Environm Monitoring, Changsha 410125, Peoples R China.;[Li, Yuyuan; Wu, Jinshui; Li, Xi; Meng, Cen; Shen, Jianlin] Univ Chinese Acad Sci, Beijing 10049, Peoples R China.;[Liu, Huanyao] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Peoples R China.
通讯机构：
[Yuyuan Li] K;Key Laboratory of Agro-ecological Processes in Subtropical Regions, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China<&wdkj&>Changsha Research Station for Agricultural and Environment Monitoring, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China<&wdkj&>University of Chinese Academy of Sciences, Beijing 10049, China
关键词：
Farm pond;Water quality;Structural equation modeling;Self-organizing map;Spatiotemporal variability
摘要：
Water quality deterioration, such as eutrophication, can contribute to the degradation of farm pond ecosystems, threatening numerous ecological services and socioeconomic benefits. However, the variability of water quality and the complexity of influencing variables pose large uncertainties for pond management practices and watershed planning. This study integrated a self-organizing map (SOM) and partial least squares structural equation modeling (PLS-SEM) to evaluate the nitrogen (N) and phosphorus (P) variations in 39 typical farm ponds in the Dongting Lake basin, and related the variations to pond internal factors, external environment, and agronomic management. The results indicated that 39 monitored farm ponds faced a high risk of eutrophication owing to high N and P levels, and that total N (TN), total P (TP), and particulate P (PP) generally exceeded the threshold of level V surface water quality standards in China (2.0 mg N L−1 and 0.2 mg P L−1). Simultaneously, pond water quality showed high spatiotemporal variability, and pollution hotspots occurred mostly during the overlapping periods of fallow-dry-winter and planting-rainy-spring. Based on the constructed SEM model, external environmental factors (meteorology, catchment landscape composition, configuration, topography, and soil chemical properties), pond internal characteristics, and agronomic management combined explained 60.2 ± 2.9 % and 54.2 ± 3.1 % of the N and P variations, respectively. There were intricate interactions among the above latent variables, including such meteorology positively moderated the paths of soil chemical properties→pond P and landscape composition→pond N and P; landscape composition, soil, and pond internal characteristics mediated the effects of other variables on variations of N and P. The total effects (indirect effects + direct effects) of landscape composition on the variations of pond N and P were higher than those of other variables. Among all the indicators composing latent variables, agricultural and residential land area percentage, rainfall, water depth, and fish farming were relatively important in pond water quality variations. The constructed model and analytical results offer essential information for the accurate management and restoration of pond water quality. © 2022 Elsevier B.V.
语种：
英文
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Ethylene positively regulates Cd tolerance via reactive oxygen species scavenging and apoplastic transport barrier formation in rice
作者：
Chen, Haifei;Zhang, Quan;Lv, Wei;Yu, Xiaoyi;Zhang, Zhenhua
期刊：
Environmental Pollution ,2022年302:119063 ISSN：0269-7491
通讯作者：
Zhang, ZH
作者机构：
[Chen, Haifei; Yu, Xiaoyi; Zhang, Zhenhua; Lv, Wei] Hunan Agr Univ, Coll Resources & Environm Sci, Changsha 410128, Peoples R China.;[Zhang, Quan] Chinese Acad Sci, Inst Subtrop Agr, Key Lab Agroecol Proc Subtrop Reg, Changsha 410128, Peoples R China.
通讯机构：
[Zhang, ZH ] H;Hunan Agr Univ, Coll Resources & Environm Sci, Changsha 410128, Peoples R China.
关键词：
Apoplastic transport;Cd;Ethylene;Flavonoid;Peroxidase activity;Phenylpropanoid
摘要：
Ethylene regulates plant root growth and resistance to environment stress. However, the role and mechanism of ethylene signaling in response to Cd stress in rice remains unclear. Here, we revealed that ethylene signaling plays a positive role in the resistance of rice to Cd toxicity. Blocking the ethylene signal facilitated root elongation under normal conditions, but resulted in severe oxidative damage and inhibition of root growth under Cd stress. Conversely, ethylene signal enhancement by EIN2 overexpression caused root bending, similar to the response of roots to Cd stress, and displayed higher Cd tolerance than the wildtype (WT) plants. Comparative transcriptome analysis indicated EIN2-mediated upregulation of genes involved in flavonoid biosynthesis and peroxidase activity under Cd stress. The synthesis of phenolic acids and flavonoids were positively regulated by ethylene. Thus, the ein2 (ethylene insensitive 2) mutants displayed lower ROS scavenging capacity than the WT. Moreover, a significant increase in Cd accumulation and relatively increased apoplastic flow were observed in the root apex of the ein2 mutant compared with the WT plants. Overall, EIN2-mediated Cd resistance in rice is mediated by the upregulation of flavonoid biosynthesis and peroxidase activity to induce ROS scavenging, and apoplastic transport barrier formation reduces Cd uptake. © 2022 Elsevier Ltd
语种：
英文
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Characteristics of carbon, nitrogen, phosphorus and sulfur cycling genes, microbial community metabolism and key influencing factors during composting process supplemented with biochar and biogas residue
作者：
Wang, Nanyi;Zhao, Keqi;Li, Fanghong;Peng, Hua;Lu, Yaoxiong;...
期刊：
Bioresource Technology ,2022年366:128224 ISSN：0960-8524
通讯作者：
Zhang, Jiachao(jiachao.zhang@163.com)
作者机构：
[Zhao, Keqi; Wang, Nanyi; Zhang, Lihua; Zhang, Jiachao; Chen, Anwei; Jiang, Shilin; Luo, Lin; Huang, Hongli; Li, Fanghong; Yan, Binghua; Wu, Genyi] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.;[Li, Fanghong; Wu, Genyi] Minist Ecol & Environm PR China, South China Inst Environm Sci, State Environm Protect Key Lab Environm Pollut Hlt, Guangzhou 510655, Peoples R China.;[Lu, Yaoxiong; Peng, Hua] Hunan Acad Agr Sci, Inst Agr Environm & Ecol, Changsha 410125, Hunan, Peoples R China.;[Li, Hui; Pan, Junting] Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Beijing 100081, Peoples R China.;[Jiang, Shilin] Hunan Acad Forestry, State Key Lab Utilizat Woody Oil Resource, Changsha 410029, Peoples R China.
通讯机构：
[Jiachao Zhang] C;College of Resources and Environment, Hunan Agricultural University, Changsha 410128, Hunan, China
关键词：
Biochar;Biogas residue;Composting;Functional gene;Microbial community metabolism
摘要：
Carbon (C), nitrogen (N), phosphorus (P), and sulfur (S) cycling functional genes and bacterial and fungal communities during composting with biochar and biogas residue amendments were studied. Correlations between microbial community structure, functional genes and physicochemical properties were investigated by network analysis and redundancy analysis. It was shown that the gene of acsA abundance accounted for about 50% of the C-related genes. Biogas residue significantly decreased the abundance of denitrification gene nirK. Biogas residues can better promote the diversity of bacteria and fungi during composting. Biochar significantly increased the abundance of Humicola. Redundancy analysis indicated that pile temperature, pH, EC were the main physicochemical factors affecting the microbial community. WSC and NO3−-N have significant correlation with C, N, P, S functional genes. The research provides a theoretical basis for clarifying the metabolic characteristics of microbial communities during composting and for the application of biochar and biogas residues in composting. © 2022 Elsevier Ltd
语种：
英文
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Endocrine disrupting chemicals in the environment: Environmental sources, biological effects, remediation techniques, and perspective
作者：
Chen, Yuxin;Yang, Jian;Yao, Bin;Zhi, Dan;Luo, Lin;...
期刊：
Environmental Pollution ,2022年310:119918 ISSN：0269-7491
通讯作者：
Zhou, Yaoyu(zhouyy@hunau.edu.cn)
作者机构：
[Chen, Yuxin; Yang, Jian; Yao, Bin; Zhi, Dan; Luo, Lin] Hunan International Scientific and Technological Cooperation Base of Agricultural Typical Pollution Remediation and Wetland Protection, College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, China;[Zhou, Yaoyu] Hunan International Scientific and Technological Cooperation Base of Agricultural Typical Pollution Remediation and Wetland Protection, College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, China. Electronic address: zhouyy@hunau.edu.cn
通讯机构：
[Yaoyu Zhou] H;Hunan International Scientific and Technological Cooperation Base of Agricultural Typical Pollution Remediation and Wetland Protection, College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, China
关键词：
Biological effects;Endocrine disrupting chemicals;Perspective;Remediation technology;Sources
摘要：
Endocrine disrupting chemicals (EDCs) have been identified as emerging contaminants, which poses a great threat to human health and ecosystem. Pesticides, polycyclic aromatic hydrocarbons, dioxins, brominated flame retardants, steroid hormones and alkylphenols are representative of this type of contaminant, which are closely related to daily life. Unfortunately, many wastewater treatment plants (WWTPs) do not treat EDCs as targets in the normal treatment process, resulting in EDCs entering the environment. Few studies have systematically reviewed the related content of EDCs in terms of occurrence, harm and remediation. For this reason, in this article, the sources and exposure routes of common EDCs are systematically described. The existence of EDCs in the environment is mainly related to human activities (Wastewater discharges and industrial activities). The common hazards of these EDCs are clarified based on available toxicological data. At the same time, the mechanism and effect of some mainstream EDCs remediation technologies (such as adsorption, advanced oxidation, membrane bioreactor, constructed wetland, etc.) are separately mentioned. Moreover, our perspectives are provided for further research of EDCs. © 2022 Elsevier Ltd
语种：
英文
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Iminodisuccinic Acid Relieved Cadmium Stress in Rapeseed Leaf by Affecting Cadmium Distribution and Cadmium Chelation with Pectin
作者：
Tian, Hui;Zhu, Zihan;Song, Haixing;Wu, Xiuwen
期刊：
Adsorption Science & Technology ,2022年2022 ISSN：0263-6174
通讯作者：
Wu, Xiuwen(wuxiuwen0605@163.com)
作者机构：
[Zhu, Zihan; Wu, Xiuwen] College of Resources and Environmental Sciences, Qingdao Agricultural University, Qingdao, China;[Song, Haixing] College of Resources and Environmental Sciences, Hunan Agricultural University, Changsha, China;[Tian, Hui] College of Resources and Environmental Sciences, Qingdao Agricultural University, Qingdao, China<&wdkj&>College of Resources and Environmental Sciences, Hunan Agricultural University, Changsha, China
通讯机构：
[Wu, X.] C;College of Resources and Environmental Sciences, Qingdao Agricultural University, Qingdao, China
摘要：
Rapeseed (Brassica napus L.) is a nutritious vegetable, while cadmium (Cd) pollution threatens the growth, productivity, and food security of rapeseed. By studying the effects of iminodisuccinic acid (IDS), an easily biodegradable and environmental friendly chelating agent, on Cd distribution at the organ and cellular level, we found IDS promoted dry matter accumulation of rapeseed and increased the contents of photosynthetic pigment in leaves. Inhibited root-shoot Cd transport resulted in higher activity of antioxidant enzymes and decreased hydrogen peroxide (H2O2) and malondialdehyde (MDA) accumulation in leaves, which indicated that IDS contributed to alleviating Cd-caused oxidative damage in leaf cells. Additionally, IDS increased Cd subcellular distribution in cell wall (CW), especially in covalently bound pectin (CSP), and relieved Cd toxicity in organelle of leaves. IDS also enhanced demethylation of CSP. The Cd content in CSP, demethylation degree, and pectin methylesterase activity of CSP increased by 37.95%, 13.34%, and 13.16%, respectively, while IDS did not change the contents of different CW components. The improved Cd fixation in leaf CW was mainly attributed to enhance demethylation of covalently bound pectin (CSP) and Cd chelation with CSP. © 2022 Hui Tian et al.
语种：
英文
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Environmentally-friendly carbon nanomaterials for photocatalytic hydrogen production
作者：
Xiong, Sheng;Tang, Rongdi;Gong, Daoxin;Deng, Yaocheng;Zheng, Jiangfu;...
期刊：
催化学报 ,2022年43(7):1719-1748 ISSN：0253-9837
通讯作者：
Deng, Yaocheng(dengyaocheng@hunau.edu.cn)
作者机构：
[Tang, Rongdi; Deng, Yaocheng; Li, Ling; Gong, Daoxin; Su, Long; Zhou, Zhanpeng; Yang, Lihua; Xiong, Sheng; Zheng, Jiangfu] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.
通讯机构：
[Deng, Y.] C;College of Resources & Environment, Hunan Agricultural University, Hunan, Changsha, China
关键词：
Carbon nanostructured materials;Photocatalysis;Hydrogen production
摘要：
Currently, the energy crisis is the crucial problem faced by the world, and photocatalytic hydrogen (H2) production is recognized with a chance to be a standout amongst those guaranteeing results to this issue. For a long time, photocatalytic H2 production has mainly relied on the noble metal catalysts. However, the limitations of noble metals themselves, such as scarcity and high cost, have severely restricted their large-scale application. Therefore, it is urgent to seek a cheaper, more efficient, and stable catalyst for photocatalytic H2 production. Fortunately, the emergence of carbon nanostructured materials (CNMs) has brought dawn. Its excellent structure and semiconductor performance can effectively participate in photocatalytic H2 production. CNMs have developed rapidly since they appeared in the field of photocatalytic water splitting. Therefore, it is necessary to summarize the latest progress of CNMs promptly for further development. This review introduced the CNMs, including carbon dots, fullerenes, carbon nanotubes, graphene, and graphdiyne, which is a powerful assistant in photocatalytic H2 production. CNMs can provide abundant adsorption and active sites, charge separation and transport channels, photocatalysts, co-catalysts and photosensitizers. Then, this review has introduced the strategy for enhancing CNMs in photocatalytic H2 production based on recent research. Finally, the challenge faced by CNMs in photocatalytic H2 production has prospected. © 2022 Dalian Institute of Chemical Physics, the Chinese Academy of Sciences
语种：
英文
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Response of bacterial community to iron oxide nanoparticles during agricultural waste composting and driving factors analysis
作者：
Zhang, Lihua;Hu, Yunlong;Huang, Hongli;Ren, Liheng;Zhang, Jiachao* ;...
期刊：
Bioresource Technology ,2022年345:126530 ISSN：0960-8524
通讯作者：
Zhang, Jiachao
作者机构：
[Yan, Binghua; Hu, Yunlong; Ren, Liheng; Zhang, Lihua; Zhang, Jiachao; Liu, Jun; Gu, Sijia; Huang, Hongli; Luo, Lin] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Peoples R China.
通讯机构：
[Zhang, Jiachao] H;Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Peoples R China.
关键词：
Bacterial community;Composting;Core microorganism;Driving factor;Metabolic function
摘要：
The succession of bacterial communities and their function, and the core microorganisms for water soluble organic carbon (WSC) and organic matter (OM) changes during agricultural waste composting with addition of iron oxide nanomaterials (FeONPs, Fe2O3 NPs and Fe3O4 NPs) were investigated. Moreover, driving factors for bacterial composition and metabolism were analyzed. Results showed that FeONPs treatments increased the relative abundance of thermophilic microorganisms for OM degradation. Most of the core genera were responsible for decomposition of OM and synthesis of WSC. Additionally, FeONPs promoted the metabolism of amino acids. The most significant factors for dominant genera in control, Fe2O3 NPs and Fe3O4 NPs group were moisture (62.1%), moisture (62.0%) and OM (58.2%), respectively. For metabolism, the most significant factors in control, Fe2O3 NPs and Fe3O4 NPs group were temperature (57.2%), NO3–-N (60.5%), NO3–-N (62.6%), respectively. The relationships between compost properties, bacterial community and metabolism were changed by FeONPs. © 2021 Elsevier Ltd
语种：
英文
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Multilayer Self-Assemblies for Fabricating Graphene-Supported Single-Atomic Metal via Microwave-Assisted Emulsion Micelle
作者：
Zhang, Mengyuan;Li, Xiaohui;Yang, Yihui;Li, Tiejun;Luo, Huili;...
期刊：
Small ,2022年18(24):2201291- ISSN：1613-6810
通讯作者：
Qin, L;Wen, LH
作者机构：
[Li, Xiaohui; Qin, Lei; Zhang, Mengyuan; Yang, Yihui] Zhejiang Univ Technol, Ctr Membrane Separat & Water Sci & Technol, State Key Lab Base Green Chem Synth Technol, Hangzhou 310014, Peoples R China.;[Li, Tiejun] Zhejiang Marine Fisheries Res Inst, State Key Lab Sustainable Utilizat Technol Res Ma, Zhoushan 316021, Peoples R China.;[Luo, Huili] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Peoples R China.;[Wen, Luhong; Wen, LH] Ningbo Univ, Res Inst Adv Technol, Ningbo 315211, Peoples R China.
通讯机构：
[Qin, L ] Z;[Wen, LH ] N;Zhejiang Univ Technol, Ctr Membrane Separat & Water Sci & Technol, State Key Lab Base Green Chem Synth Technol, Hangzhou 310014, Peoples R China.;Ningbo Univ, Res Inst Adv Technol, Ningbo 315211, Peoples R China.
关键词：
electrocatalysis;emulsion micelles;graphene;microwave chemistry;single-atomic metals
摘要：
Inspired by molecular self-assemblies in nature, this article reports a versatile strategy for confined encapsulation of single-atomic metal into high-quality rGO nanosheets by the microwave-assisted emulsion micelle method. Multilayer self-assembly of organometallics–surfactants micelles into the interlayer of nanosheets can not only promote microwave exfoliation and reduction of GO but also precisely control loading and distribution of single-metal atoms. With this synthetic strategy, the simultaneous trinity of exfoliation, reduction, and composition are achieved for 1min. Experimental results and density functional theory calculations demonstrate that graphene-supported FeN4O2 sites exhibit optimal binding energy toward superior selective adsorption (adsorption amount of 1975.6mg g−1 with separation efficiency of 97.6%) and electrocatalytic oxidation (TOFs as high as 1.31 min−1). This work provides a simple and efficient avenue for the large-scale preparation of single-atomic metal composites in environmental and energy fields. © 2022 Wiley-VCH GmbH.
语种：
英文
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Microbial and Environmental Processes Shape the Link between Organic Matter Functional Traits and Composition
作者：
Hu, Ang;Jang, Kyoung-Soon;Meng, Fanfan;Stegen, James;Tanentzap, Andrew J.;...
期刊：
Environmental Science & Technology ,2022年56(14):10504-10516 ISSN：0013-936X
通讯作者：
Wang, Jianjun(jjwang@niglas.ac.cn)
作者机构：
[Hu, Ang] College of Resources and Environment, Hunan Agricultural University, Changsha;410128, China;[Meng, Fanfan; Wang, Jianjun] State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academic of Sciences, Nanjing;210008, China;[Jang, Kyoung-Soon; Choi, Mira] Bio-Chemical Analysis Team, Korea Basic Science Institute, Cheongju
通讯机构：
[Jianjun Wang] S;State Key Laboratory of Lake Science and Environment, Nanjing Institute of Geography and Limnology, Chinese Academic of Sciences, Nanjing 210008, China<&wdkj&>University of Chinese Academy of Sciences, Beijing 100049, China
关键词：
assembly processes;dissolved organic matter;global change;microbes;molecular activity;molecular reactivity
摘要：
Dissolved organic matter (DOM) is a large and complex mixture of molecules that fuels microbial metabolism and regulates biogeochemical cycles. Individual DOM molecules have unique functional traits, but how their assemblages vary deterministically under global change remains poorly understood. Here, we examine DOM and associated bacteria in 300 aquatic microcosms deployed on mountainsides that span contrasting temperatures and nutrient gradients. Based on molecular trait dimensions of reactivity and activity, we partition the DOM composition into labile-active, recalcitrant-active, recalcitrant-inactive, and labile-inactive fractions and quantify the relative influences of deterministic and stochastic processes governing the assembly of each. At both subtropical and subarctic study sites, the assembly of labile or recalcitrant molecules in active fractions is primarily governed by deterministic processes, while stochastic processes are more important for the assembly of molecules within inactive fractions. Surprisingly, the importance of deterministic selection increases with global change gradients for recalcitrant molecules in both active and inactive fractions, and this trend is paralleled by changes in the deterministic assembly of microbial communities and environmental filtering, respectively. Together, our results highlight the shift in focus from potential reactivity to realized activity and indicate that active and inactive fractions of DOM assemblages are structured by contrasting processes, and their recalcitrant components are consistently sensitive to global change. Our study partitions the DOM molecular composition across functional traits and links DOM with microbes via a shared ecological framework of assembly processes. This integrated approach opens new avenues to understand the assembly and turnover of organic carbon in a changing world. © 2022 American Chemical Society.
语种：
英文
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典型铁、锰矿物对稻田土壤砷形态与酶活性的影响
作者：
周一敏;黄雅媛;刘凯;赵儒乐;李冰玉;...
期刊：
环境科学 ,2022年43(5):2732-2740 ISSN：0250-3301
通讯作者：
Lei, Ming(leiming8297@163.com)
作者机构：
[周一敏; 黄雅媛; 刘凯; 赵儒乐; 李冰玉; 雷鸣] College of Resources and Environment, Hunan Agricultural University, Changsha;410128, China;[周一敏; 黄雅媛; 刘凯; 赵儒乐; 李冰玉; 雷鸣] 410128, China
关键词：
砷;水铁矿;水钠锰矿;形态;土壤酶活性
摘要：
为了探究铁、锰矿物对稻田土壤砷（As）形态与酶活性的影响，将实验室合成的水铁矿和水钠锰矿添加到As污染稻田土壤中进行持续淹水土壤培养实验。结果表明与对照（CK）相比，添加0.1%水铁矿（+Fe）和0.1%水钠锰矿（+Mn）能延缓土壤Eh降低，增加土壤溶液中Fe和Mn的浓度，但是对土壤pH影响较小。与预期相符，+Fe和+Mn处理显著降低大部分监测点土壤溶液中总As（TAs）浓度，提高土壤溶液中砷酸盐[As（V）]占TAs的比例，促使固相As形态向晶型铁氧化物结合态As（F5）转化。此外，与CK相比，+Fe和+Mn处理土壤脲酶活性分别提高5.01%和101.36%，土壤蔗糖酶活性分别提高394.51%和688.84%，土壤过氧化氢酶活性分别提高30.44%和64.71%。因此，外源添加水铁矿和水钠锰矿可以降低As污染土壤的环境风险，提高土壤养分利用率。
语种：
中文
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Mycorrhizal Benefits of Salt-Stressed Cinnamomum camphora (L.) Presl. May Be Related to P and Mn2+ Contents in Shoots, Biomass Allocation, and K+/Na+ in Roots and Shoots
作者：
Wang, Yanhong;Li, Tiantian;Wu, Aiping;Li, Yan;Zhang, Naili
期刊：
Forests ,2022年13(11):1882- ISSN：1999-4907
通讯作者：
Wang, Yanhong(wangyanhong@zafu.edu.cn);Zhang, Naili(zhangnaili@bjfu.edu.cn)
作者机构：
[Li, Tiantian; Li, Yan; Wang, Yanhong] Zhejiang A&F Univ, State Key Lab Subtrop Silviculture, Hangzhou 311300, Peoples R China.;[Wu, Aiping] Hunan Agr Univ, Coll Resources & Environm, Ecol Dept, Hunan Prov Key Lab Rural Ecosyst Hlth Dongting La, Changsha 410128, Peoples R China.;[Zhang, Naili] Beijing Forestry Univ, Key Lab Silviculture & Conservat, Minist Educ, Beijing 100083, Peoples R China.
通讯机构：
[Yanhong Wang] A;[Naili Zhang] T;Authors to whom correspondence should be addressed.<&wdkj&>State Key Laboratory of Subtropical Silviculture, Zhejiang A & F University, Hangzhou 311300, China<&wdkj&>The Key Laboratory for Silviculture and Conservation of Ministry of Education, Beijing Forestry University, Beijing 100083, China<&wdkj&>Authors to whom correspondence should be addressed.
关键词：
Cinnamomum camphora;Funneliformis mosseae;K+/Na+;P and Mn2+ concentrations;Rhizophagus irregularis;salinity
摘要：
Arbuscular mycorrhizal fungi (AMF) are taken as bioameliorators to alleviate the detrimental effects of salt stress. However, how AMF affect the performance of Cinnamomum camphora, an economically important species, remains unclear. In this study, we evaluated the interactive effects of AMF and salinity on the growth, nutrient acquisition, and ion ratios of C. camphora. A factorial experiment was implemented in a greenhouse with four fungal regimes (inoculation with sterilized AMF or with Funneliformis mosseae or Rhizophagus irregularis either alone or in combination), and three salt regimes (0, 50, and 200 mM NaCl). Results showed that salinity alone significantly reduced the total dry weight, mycorrhizal colonization, K+ concentration, and ionic homeostasis (particularly K+:Na+, Mg2+:Na+, and Ca2+:Na+) of whole plants. Mycorrhizal inoculation, particularly with R. irregularis, strongly mitigated some of the detrimental effects of salinity, enhancing the salt tolerance of C. camphora. Furthermore, the host plants benefited from the presence of AMF, mainly because they enhanced P and Mn2+ concentrations in the shoots, adjusted biomass allocation, and shifted the selective transporting capacity of K+ over Na+ from roots to shoots. Our results suggested that building mycorrhizal association between C. camphora and R. irregularis may be useful for plant cultivation in coastal areas. © 2022 by the authors.
语种：
英文
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Iron reduction process and antimony behavior change in paddy soils under stationary flooding conditions
作者：
Long, Jiumei;Zhou, Dongsheng;Huang, Yayuan;Yi, Zhengji;Bin, Dongmei;...
期刊：
Applied Geochemistry ,2022年142:105311 ISSN：0883-2927
通讯作者：
Lei, Ming(leiming@hunau.edu.cn)
作者机构：
[Bin, Dongmei; Deng, Jingheng; Long, Jiumei; Zhou, Dongsheng; Wang, Jing; Luo, Yuanlai] Hengyang Normal Univ, Coll Life Sci & Environm, Hunan Key Lab Conservat & Utilizat Biol Resources, Hengyang 421008, Peoples R China.;[Huang, Yayuan; Lei, Ming] Hunan Agr Univ, Coll Resource & Environm, Hunan Engn Res Ctr Safe & High Efficient Utilizat, Changsha 410128, Peoples R China.;[Yi, Zhengji] Hengyang Normal Univ, Coll Chem & Mat Sci, Hengyang 421008, Peoples R China.
通讯机构：
[Ming Lei] H;Hunan Engineering Research Center for Safe & High-Efficient Utilization of Heavy Metal Pollution Farmland, College of Resource & Environment, Hunan Agricultural University, Changsha, 410128, PR China
关键词：
Antimony species;Citric acid extraction;Iron fraction;Iron reduction;Sequential extraction
摘要：
Although iron reduction coupled with antimony (Sb) behavior change has attracted increasing interest in recent years, this process has not yet been well addressed in paddy soils under natural flooding conditions. This study investigates the iron reduction process in paddy soils using a stationary flooding incubation experiment. The paddy soils used in the study contained 199, 329 and 450 mg/kg of Sb (referred to as LS, MS and HS, respectively). Results showed that iron reduction lasted for 12–14 d under simulated flooding conditions at 25 °C, with the highest total Fe(II) being 778, 791 and 782 mg/kg in LS, MS and HS, respectively. Through the iron reduction process, easily reducible iron (Fe2) and reducible iron (Fe3) decreased by 26.1–38.4% and 4.03–12.8%, respectively, indicating that small fractions of iron oxides underwent reductive dissolution. The abundant phyla of iron-reducing bacteria in these soils were Proteobacteria, Firmicutes and Actinobacteriota. Moreover, up to 14 genera were identified as abundant iron-reducing bacteria in these paddy soils. Among, the most abundant genera were Azospirillum and Magnetospirillum, which are also known to mediate the iron nutrition supply for plants and magnetite formation, respectively. Along with iron reduction, iron oxide-incorporated Sb decreased by 7.87–17.3%, while soil surface-bound Sb increased by 42.4–60.4%. This demonstrates that substantial Sb released from iron reductive dissolution was adsorbed on the soil surface. In addition, the total aqueous Sb increased by 24.9–33.0 μg/L through iron reduction in these flooding soils, indicating that iron reduction promoted Sb mobilization in paddy soils under flooding conditions. Sb was synchronously reduced to Sb(III), with Sb(III) accounting for 51.1–59.4% of the total citric acid extracted Sb at the end of iron reduction. However, the aqueous Sb(III) was lower by orders of magnitude than the corresponding Sb(V) in these soils. This might imply that the strong adsorption affinity of Sb(III) to the soil solid facilitated the increase in soil surface-bound Sb in all flooded paddy soils. © 2022 Elsevier Ltd
语种：
英文
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Effect of the direct use of biomass in agricultural soil on heavy metals __ activation or immobilization?
作者：
Zhang, Qiuguo;Zou, Dongsheng;Zeng, Xinyi;Li, Longcheng;Wang, Andong;...
期刊：
Environmental Pollution ,2021年272:115989 ISSN：0269-7491
通讯作者：
Xiao, Zhihua
作者机构：
[Zeng, Xinyi; Xiao, Zhihua; Zhang, Qiuguo; Zeng, Qingru; Wang, Andong; Liu, Fen; Li, Longcheng; Zou, Dongsheng; Wang, Hua] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.;[Zeng, Xinyi; Xiao, Zhihua; Zhang, Qiuguo; Zeng, Qingru; Wang, Andong; Liu, Fen; Li, Longcheng; Zou, Dongsheng; Wang, Hua] Key Lab Rural Ecosyst Hlth Dongting Lake Area Hun, Changsha 410128, Peoples R China.
通讯机构：
[Xiao, Zhihua] H;Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Hunan, Peoples R China.
关键词：
Bioavailability;Biomass;Direct agricultural utilization;Heavy metal;Humic substances
摘要：
Short-term and long-term effects of biomass on HMs in soil are summarized. Point out that biomass with high HM content cannot be directly used for agricultural production. © 2020 Elsevier LtdIn recent years, the biomass was directly used extensively in agriculture due to its low cost and convenience. Increasingly serious soil pollution of heavy metals may pose threats and risks to human health. Directly addition of biomass to soil may affect the bioavailability and content of heavy metals. Here, we reviewed the impact of direct application of oil cake, manure, sewage sludge, straw and municipal waste to soil on the form and concentration of heavy metals in soil, and also emphasized the role of biomass in soil heavy metals remediation. Heavy metals can be activated in a short term by the content of heavy metals in biomass, the production of low-molecular-weight organic acids by biomass application, and the oxidation of sulfides (except for ammoniation). However, heavy metals in soil can be immobilized by humic substances. These can be produced by biomass during a long-term application to soil. Moreover, the degree of immobilization depended on the kind of biomass. Biomass contaminated by heavy metals cannot be returned to the field directly. Therefore, Mitigating the activation of heavy metals in the early stage of biomass application is meaningful, especially for application of these biomass such as straw, sewage sludge and municipal waste. Future researches should focus on the heavy metal control on direct use of biomass in agricultural. © 2020 Elsevier Ltd
语种：
英文
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New insights into ball milling effects on MgAl-LDHs exfoliation on biochar support: A case study for cadmium adsorption
作者：
Cui, Shihao;Zhang, Ran;Peng, Yutao;Gao, Xing;Li, Zhe;...
期刊：
Journal of Hazardous Materials ,2021年416 ISSN：0304-3894
通讯作者：
Chen, Qing(qchen@cau.edu.cn)
作者机构：
[Zhang, Ran; Cui, Shihao; Peng, Yutao; Fan, Beibei; Chen, Qing] China Agr Univ, Coll Resources & Environm Sci, Beijing Key Lab Farmland Soil Pollut Prevent & Re, Beijing 100193, Peoples R China.;[Gao, Xing] Tongji Univ, Sch Environm Sci & Engn, State Key Lab Pollut Control & Reuse, Shanghai 200092, Peoples R China.;[Gao, Xing] Chinese Res Inst Environm Sci, State Key Lab Environm Criteria & Risk Assessment, Beijing 100012, Peoples R China.;[Li, Zhe] Tsinghua Univ, Sch Environm, Beijing 100084, Peoples R China.;[Guan, Chung-Yu] Natl Ilan Univ, Dept Environm Engn, Yilan 260, Taiwan.
关键词：
Engineered biochar;Layered double hydroxides;Ball milling;Cadmium;Wastewater treatment
摘要：
Ball milling (BM) as a solvent-free technology has been widely used to tailor the biochar-based adsorbents with high porosity and well dispersion for enhancing their environmental applications. In this study, the ball-milled layered double hydroxides (LDHs) biochar composite (B-LDHs-BC) was successfully fabricated with BM method for Cd(II) adsorption and the BM effects on the LDHs-BC structure-performance relationships were investigated. The solid-state characterization demonstrated the LDHs were successfully exfoliated by BM on the B-LDHs-BC surface which was identified by the enlarged basal spacing and reduced crystallite size of the LDHs. Although the BET surface area of B-LDHs-BC (226 m2/g) was slightly lower than the ball-milled BC, the B-LDHs-BC had more O-containing functional groups and higher adsorption capacity (119 mg/g). The kinetics experiments indicated that the Cd(II) removal by B-LDHs-BC was through both the physical and chemical adsorption processes, and the liquid membrane diffusion was the rate-controlling step. The positive BM effects mainly induced more abundant acidic functional groups and active adsorption sites, and thus enhanced Cd(II) performance of B-LDHs-BC. This work demonstrated a facile solvent-free method for production of the exfoliated LDHs modified BC composite, and also well illustrated the BM effects which can extend their practical use in environment. © 2021
语种：
英文
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Phenological mismatch caused by water regime change may explain the population variation of the vulnerable lesser white-fronted goose in east Dongting Lake, China
作者：
Zhang, Pingyang;Zou, Yeai;Xie, Yonghong;Zhang, Siqi;Zhu, Feng;...
期刊：
Ecological Indicators ,2021年127:107776 ISSN：1470-160X
通讯作者：
Zou, Yeai(zouyeai@163.com)
作者机构：
[Chen, Xinsheng; Deng, Zhengmiao; Zhang, Siqi; Zou, Yeai; Li, Feng; Xie, Yonghong; Zhang, Pingyang] Chinese Acad Sci, Key Lab Agroecol Proc Subtrop Reg, Changsha 410125, Peoples R China.;[Chen, Xinsheng; Deng, Zhengmiao; Zhang, Siqi; Zou, Yeai; Li, Feng; Xie, Yonghong; Zhang, Pingyang] Chinese Acad Sci, Inst Subtrop Agr, Dongting Lake Stn Wetland Ecosyst Res, Changsha 410125, Peoples R China.;[Zhang, Siqi; Zhang, Pingyang] Univ Chinese Acad Sci, Beijing 100049, Peoples R China.;[Zhu, Feng] Hunan Agr Univ, Coll Resources & Environm, Changsha 410128, Peoples R China.;[Song, Yucheng; Yao, Yi] Hunan East Dongting Lake Natl Nat Reserve, Adm Bur, Yueyang 414000, Peoples R China.
通讯机构：
[Yeai Zou; Yonghong Xie] K;Key Laboratory of Agro-ecological Processes in Subtropical Regions, Chinese Academy of Sciences, Changsha 410125, China<&wdkj&>Dongting Lake Station for Wetland Ecosystem Research, Institute of Subtropical Agriculture, Chinese Academy of Sciences, Changsha 410125, China
关键词：
Ecological mismatch;NDVI;Water regime;Wintering site;Anser erythropus
摘要：
Phenological mismatches between migratory birds and food availability driven by global warming have been found to influence the fitness and population dynamics of several herbivorous goose species in Arctic breeding sites. However, the effect of phenological mismatches at wintering sites have been inadequately studied. We used long-term data to explore the consequences of water regime changes on phenological mismatch (i.e., days between arrival of geese and timing of the optimal Normalized Difference Vegetation Index [NDVIopt]) and detect the relative role of the mismatch as a driver of annual variations in abundance and distribution of the Lesser White-fronted Goose Anser erythropus (a vulnerable species on the IUCN Red List) in East Dongting Lake, which is the one of this species’ largest wintering sites worldwide. The NDVI of the Carex meadow (i.e., the dominant vegetation in East Dongting Lake wetland and also the major food resource for the geese) was used as the phenology metric. Results showed that the water recession pattern greatly influenced food conditions when geese arrived at the site. Early water recession led to significantly higher NDVI, whereas late water recession led to significantly lower NDVI than did the optimal water recession. However, the suitable habitat area was significantly larger under the optimal water recession pattern. Both early and late water level recessions caused greater mismatches and resulted in lower geese abundance and a more concentrated distribution. NDVI was positively correlated with aboveground biomass and negatively correlated with N% of Carex spp. High biomass and low N% related to high NDVI caused by early water recession may indicate unfavorable food conditions at the time that geese arrive and reduced sustainable food availability in mid-winter, while a low NDVI and limited habitat area caused by late water recession may indicate an insufficient food supply. In conclusion, non-optimal water recession led to a greater phenological mismatch and resulted in limited habitat quality (e.g., lower leaf N%) under early water recession but limited habitat quantity (e.g., smaller habitat area and lower aboveground biomass) under late water recession, and ultimately threatened the Lesser White-fronted Goose. Our results contributed to explaining the decline of the Lesser White-fronted Goose population in this wintering site. © 2021
语种：
英文
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Quantitative Detection of Zinc Oxide Nanoparticle in Environmental Water by Cloud Point Extraction Combined ICP-MS
作者：
Yang, Yuan;Liu, Xin;Luo, Lin;Wei, Wenjing;Wang, Qiang;...
期刊：
Adsorption Science & Technology ,2021年2021 ISSN：0263-6174
通讯作者：
Zhang, Jiachao(jiachao.zhang@163.com);Wang, Qiang(qwangcsu@163.com)
作者机构：
[Yang, Yuan; Zhang, Jiachao; Liu, Xin; Luo, Lin] Hunan Agr Univ, Coll Resources & Environm, Int Joint Lab Hunan Agr Typ Pollut Restorat & Wat, Changsha 410128, Peoples R China.;[Wei, Wenjing; Yang, Yuan; Wang, Qiang] Cent South Univ, Coll Chem & Chem Engn, Key Lab Hunan Prov Water Environm & Agr Prod Safe, 932 Lushan Nan Rd, Changsha 410083, Peoples R China.
通讯机构：
[Zhang, J.] I;[Wang, Q.] K;International Joint Laboratory of Hunan Agricultural Typical Pollution Restoration, China;Key Laboratory of Hunan Province for Water Environment and Agriculture Product Safety, No. 932 Lushan Nan Road, Yuelu District, China
摘要：
The increasing usage of zinc oxide nanoparticles (ZnONPs) inevitably leads to their release into the environment. To understand their fate and toxicity in water systems, a reliable method for the quantitative analysis of ZnONPs in environmental waters is urgently needed to be established. In this study, a quantitative analytical method of ZnONPs in environmental waters was developed by cloud point extraction (CPE) combined inductively coupled plasma mass spectrometry (ICP-MS). To obtain high recoveries of ZnONPs, the CPE parameters including pH, surfactant concentration, salt concentration, bath temperature, and time were optimized. The results demonstrated that the addition of β-mercaptoethylamine could significantly reduce the interference of Zn2+ on the extraction of ZnONPs, while the CPE approach was not affected significantly by the typical environmental inorganic ion and ENMs (such as Au, TiO2, and Al2O3). The extraction method of ZnONPs with different diameters was also assessed, and satisfactory extraction efficiency was obtained. The results of ZnONP concentration in collected environmental water were in the range of 0.2±0.009-8.2±1.8 μg/L. And the recoveries of ZnONPs in different environmental waters were 62.2±2.0-88.1±9.6% at low concentration spiked levels (12.57-54.68 μg/L), demonstrating that it is efficient to extract trace ZnONPs from real environmental waters. This established method offered a reliable method for the quantitative determination of ZnONPs in environmental waters, which could further promote the study of the environmental behavior, fate, and toxicity of ZnONPs in an aqueous environment. © 2021 Yuan Yang et al.
语种：
英文
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Effect of RM-based-passivator for the remediation of two kinds of Cd polluted paddy soils and mechanism of Cd(II) adsorption.
作者：
Li, Hui;Liu, Yan;Luo, Zirui;Zhou, Yaoyu* ;Hou, Dongmei;...
期刊：
Environmental Technology ,2021年42(10):1623-1633 ISSN：0959-3330
通讯作者：
Zhou, Yaoyu
作者机构：
[Hou, Dongmei; Luo, Zirui; Mao, Qiming; Yang, Yuan; Zhou, Yaoyu; Zhi, Dan; Li, Hui; Zhang, Jiachao; Luo, Lin] Hunan Agr Univ, Coll Resources & Environm, Changsha, Hunan, Peoples R China.;[Liu, Yan; Li, Hui] Hunan Modern Environm Technol Co LTD, Changsha, Hunan, Peoples R China.
通讯机构：
[Zhou, Yaoyu] H;Hunan Agr Univ, Coll Resources & Environm, Changsha, Hunan, Peoples R China.
关键词：
Passivator;rice growth;available Cd;remediation effect;mechanism
摘要：
This study aimed to investigate the effects of red mud-based-passivator (RM-based-passivator) on rice yield, cadmium (Cd) in brown rice, pH and available Cd in Cd-polluted soil by pot experiments, and to explore the adsorption mechanism of the passivator by scanning electron microscope (SEM), energy-dispersive X-ray spectroscopy (EDX), fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD) analysis. The results showed that this passivator obviously improved the pH, reduced the available Cd in soil and the Cd content in brown rice in Changsha Cd polluted soil (CS soil), while had little effect on Hengyang Cd polluted soil (HY soil). Compared with the control, the soil pH increased in the range from 0.31 to 1.37, the available Cd in soil decreased in the range from 13.25% to 52.34%, and the total Cd in brown rice decreased in the range from 46.44% to 84.98% in CS soil. Considering the impacts of RM-based-passivator on the growth of rice, the Cd content in brown rice, and the pH and available Cd in soil, 0.10–0.30% (w/w) of the passivator is recommended to apply in CS soil but not in HY soil. Based on the analysis of SEM, EDX, FTIR and XRD, the mechanism of Cd(II) adsorption by RM-based-passivator included physical adsorption, surface complexation and ion exchange. The present results indicated that the appropriate addition of RM-based-passivator could be an effective strategy for the remediation of acidic Cd-polluted soils. © 2019 Informa UK Limited, trading as Taylor & Francis Group.
语种：
英文
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A novel modified Fe–Mn binary oxide graphite felt (FMBO-GF) cathode in a neutral electro-Fenton system for ciprofloxacin degradation
作者：
Huang, Anqi;Zhi, Dan;Zhou, Yaoyu
期刊：
Environmental Pollution ,2021年286:117310 ISSN：0269-7491
通讯作者：
Zhou, Yaoyu(zhouyy@hunau.edu.cn)
作者机构：
[Zhi, Dan; Zhou, Yaoyu; Huang, Anqi] Hunan Agr Univ, Coll Resources & Environm, Hunan Int Sci & Technol Cooperat Base Agr Typical, Changsha 410128, Peoples R China.
通讯机构：
[Yaoyu Zhou] H;Hunan International Scientific and Technological Cooperation Base of Agricultural Typical Pollution Remediation and Wetland Protection, College of Resources and Environment, Hunan Agricultural University, Changsha, 410128, China
关键词：
Ciprofloxacin;Electro-Fenton;FMBO-GF cathode;Neutral pH
摘要：
A graphite felt (GF) cathode was firstly modified by Fe–Mn binary oxide (FMBO), active carbon (AC), carbon black (CB), and polytetrafluoroethylene (PTFE), which exhibits satisfactory ciprofloxacin (CIP) removal efficiency at neutral pH value in electro-Fenton (EF) system. Morphological data showed that modified cathodes have larger surface area and volume pore as well as more active sites. And electrochemical properties have proved stronger current response after modification. In compassion to the unmodified GF, the FMBO/AC/CB modified GF (FMBO-GF) has wider pH range and higher CIP removal efficiency due to its unique nanoparticles structure. The CIP removal efficiency achieved 95.40% in 30 min, and the removal efficiency of total organic carbon (TOC) achieved 93.77% in 2 h when conditions were optimal (25 mg/L initial CIP concentration, 2 mA/cm2 current density, FMBO/AC: CB: PTFE of 1:1:5, and 7 initial pH value) in this study. The results of great degradation and mineralization of CIP in this study indicate that the FMBO-GF cathode has huge potential on antibiotics removals in neutral environment. © 2021 Elsevier Ltd
语种：
英文
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