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Arsenic release from microbial reduction of scorodite in the presence of electron shuttle in flooded soil

Journal of environmental Sciences 2023年第4期126卷 113-122页

作者： Yujuan Fang Manjia Chen Chengshuai Liu Leheng Dong Jimei Zhou Xiu Yi Dongqing Ji Jiangtao Qiao Hui Tong School of Water and Environment Chang’an UniversityXi’an 710054China National-Regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and ManagementInstitute of Eco-environmental and Soil SciencesGuangdong Academy of SciencesGuangzhou 510650China State Key Laboratory of Environmental Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550081China College of Agriculture/Tree Peony Henan University of Science and TechnologyLuoyang 471023China

Scorodite (FeAsO_(4)·H_(2)O) is a common arsenic-bearing (As-bearing) iron mineral in nearsurface environments that could immobilize or store As in a bound *** flooded soils,microbe induced Fe(Ⅲ) or As(Ⅴ) reduction can increase the mobility and bioavailability of ***,humic substances can act as electron shuttles to promote this *** dynamics of As release and diversity of putative As(Ⅴ)-reducing bacteria during scorodite reduction have yet to be investigated in detail in flooded ***,the microbial reductive dissolution of scorodite was conducted in an flooded soil in the presence of anthraquinone-2,6-disulfonate (AQDS).Anaeromyxobacter,Dechloromonas,Geothrix,Geobacter,Ideonella,and Zoogloea were found to be the dominant indigenous bacteria during Fe(Ⅲ) and As(Ⅴ) *** increased the relative abundance of dominant species,but did not change the diversity and microbial community of the systems with *** these bacteria,Geobacter exhibited the greatest increase and was the dominant Fe(Ⅲ)-and As(Ⅴ)-reducing bacteria during the incubation with AQDS and *** promoted both Fe(Ⅲ) and As(Ⅴ) reduction,and over 80%of released As(Ⅴ) was microbially transformed to As(Ⅲ).The increases in the abundance of arrA gene and putative arrA sequences of Geobacter were higher with AQDS than without *** a result,the addition of AQDS promoted microbial Fe(Ⅲ) and As(Ⅴ) release and reduction from As-bearing iron minerals into the *** results contribute to exploration of the transformation of As from As-bearing iron minerals under anaerobic conditions,thus providing insights into the bioremediation of As-contaminated soil.

关键词： Scorodite Fe(III)reduction As(V)reduction Arsenate reductase gene(arrA) AQDS

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Emerging MOFs, COFs, and their derivatives for energy and environmental applications

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The Innovation 2025年第2期6卷 105-125,104页

作者： Xinyue Zhang Minjia Yan Pei Chen Jiaqi Li Yuxuan Li Hong Li Xiaolu Liu Zhongshan Chen Hui Yang Suhua Wang Jianjun Wang Zhenwu Tang Qifei Huang Jiehong Lei Tasawar Hayat Zhijian Liu Liang Mao Tao Duan Xiangke Wang School of Environmental Science and Engineering Guangdong University of Petrochemical TechnologyMaoming 525000China College of Environmental Science and Engineering North China Electric Power UniversityBeijing 102206China College of Resources and Environment Southwest UniversityChongqing 400715China State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing 100012China School of Physics and Astronomy China West Normal UniversityNanchong 637002China Department of Mathematics Quaid-I-Azam UniversityIslamabad 44000Pakistan Department of Power Engineering North China Electric Power UniversityBaodingHebei 071003China State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210093China State Key Laboratory of Environment-friendly Energy Materials CAEA Innovation Center of Nuclear Environmental Safety TechnologySouthwest University of Science and TechnologyMianyang 621010SichuanChina

Traditional fossil fuels significantly contribute to energy supply,economic development,and advancements in science and ***,prolonged and extensive use of fossil fuels has resulted in increasingly severe environmental ***,it is imperative to develop new,clean,and pollution-free energy sources with high energy density and versatility as substitutes for conventional fossil fuels,although this remains a considerable ***,addressing water pollution is a critical *** development,design,and optimization of functional nanomaterials are pivotal to advancing new energy solutions and pollutant *** porous framework materials such as metal-organic frameworks(MOFs)and covalent organic frameworks(COFs),recognized as exemplary crystalline porous materials,exhibit potential in energy and environmental applications due to their high specific surface area,adjustable pore sizes and structures,permanent porosity,and customizable *** work provides a comprehensive and systematic review of the applications of MOFs,COFs,and their derivatives in emerging energy technologies,including the oxygen reduction reaction,oxygen evolution reaction,hydrogen evolution reaction,lithium-ion batteries,and environmental pollution remediation such as the carbon dioxide reduction reaction and environmental pollution *** addition,strategies for performance adjustment and the structure-effect relationships of MOFs,COFs,and their derivatives for these applications are *** mechanisms are summarized based on experimental discussions,theoretical calculations,and advanced spectroscopy *** challenges,future prospects,and opportunities for tailoring these materials for energy and environmental applications are presented.

关键词： Derivatives fossil fuels Emerging MOFs energy sources fossil fuelsalthough Fossil Fuels environmental Applications CoFs

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Characteristics of catalytic destruction of dichloromethane and ethyl acetate mixture over H_(x)PO_(4)-RuO_(x)/CeO_(2) catalyst

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Journal of environmental Sciences 2025年第2期148卷 336-349页

作者： Jiawen Chen Qingjie Meng Feng Bi Jingkun Chen Xiaole Weng Zhongbiao Wu Key Laboratory of Environment Remediation and Ecological Health Ministry of EducationCollege of Environmental and Resource SciencesZhejiang UniversityHangzhou 310058China School of Civil&Environmental Engineering and Geography Science Ningbo UniversityNingbo 315211China ZJU-Hangzhou Global Scientific and Technological Innovation Center Hangzhou 311200China Zhejiang Provincial Engineering Research Centre of Industrial Boiler&Furnace Flue Gas Pollution Control Hangzhou 310058China

Catalytic destruction is an ascendant technology for the abatement of volatile organic compounds(VOCs)originating fromsolvent-based industrial *** varied composition tends to influence each VOC’s catalytic behavior in the reaction *** investigated the catalytic destruction of multi-component VOCs including dichloromethane(DCM)and ethyl acetate(EA),as representatives from pharmaceutical waste gases,over co-supported HxPO_(4)-RuOx/CeO_(2) catalyst.A mutual inhibitory effect relating to concentrations because of competitive adsorption was verified in the binary VOCs oxidation and EA posed a more negative effect on DCM oxidation owing to EA’s superior adsorption *** adsorption of EA on acidic sites(HxPO_(4)/CeO_(2))promoted DCM activation on basic sites(O^(2−))and the dominating EA oxidation blocked DCM’s access to oxidation centers(RuOx/CeO_(2)),resulting in boosted monochloromethane yield and increased chlorine deposition for DCM *** impaired redox ability of Ru species owing to chlorine deposition in turn jeopardized deep oxidation of EA and its by-products,leading to increased gaseous by-products such as acetic acid originating fromEA ***,DCM at low concentration slightly promoted EA conversion at low temperatures with or without water,consistent with the enhanced EA adsorption in co-adsorption *** was mainly due to that DCM impeded the shielding effect of hydrolysate deposition from rapid EA hydrolysis depending on the decreased ***,water benefited EA hydrolysis but decreased CO_(2) selectivity while the generated water derived from EA was likely to affect DCM *** work may provide theoretical guidance for the promotion of applied catalysts toward industrial applications.

关键词： Catalytic destruction Multi-component VOCs Mixture effect Interaction mechanism

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Predicting the Bioavailability and Toxicity of Mixture Metals in Terrestrial System: Coupling of Sand Bioassay and Geochemical Models

SSRN

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SSRN 2022年

作者： Lin, Lu Zhu, Bojing Qu, Xiaoze Gu, Xueyuan State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University Nanjing China

The application of terrestrial toxicity models to real soil environments is a challenge due to the heterogeneity of soil. In this study, we present a new modeling approach able to predict the bioaccumulation and toxicity of a metal mixture in different soils. Equations describing dose-accumulation and dose-toxicity relationships of Cd-Ni mixtures to wheat root elongation were generated using a standard sand culture bioassay. A geochemical multi-surface speciation model (MSM) with default parameters was employed to predicted the dissolved metal contents Cdis of three soils collected in China with different properties. Several toxicity models (TU/CAM + FIAM/BLM/GCSM) were screened to identify the one yielding the most accurate predictions. The results showed that metal bioaccumulation was better predicted by the MSM-Cdis integrated with the dose-accumulation equation (RMSE dis in combination with the BLM+CAM model successfully predicted Cd-Ni toxicity in all three soils (RMSE = 20.7), but the deviation was slightly larger than that obtained in measurements of metals in soil porewater (RMSE =17.2). Our study demonstrates that the MSM coupled with the dose-accumulation and dose-toxicity equations derived from sand bioassays offers a promising approach in risk assessments of mixed metals in actual soils while avoiding tedious soil bioassays, which will greatly improve the practical application value of terrestrial toxic model. © 2022, The Authors. All rights reserved.

关键词： Soils

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Titanium Xerogel as a Potential Alternative for Polymeric Ferric Sulfate in Coagulation Removal of Antimony from Reverse Osmosis Concentrate

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SSRN 2022年

作者： Wu, Bingdang Li, Jingbiao Gan, Yonghai Hang, Zhihao Li, Haojie Zhang, Shujuan State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University 210023 China

Reverse osmosis (RO) is a useful process for water purification or water reuse. Nevertheless, the generated RO concentrate may adversely affect the environment if not properly treated. Coagulation with polymeric ferric sulfate (PFS) is a widely used method for the treatment of antimony (Sb)-containing RO concentrate. However, the PFS coagulation is still suffering from high residual metal and turbidity. Herein, a titanium xerogel coagulant (TXC) was evaluated as an alternative for PFS to remove Sb from RO concentrate. The RO concentrate collected from a local textile factory had an initial Sb concentration of 806 μg/L, a turbidity less than 1 NTU, and a high conductivity (5.3 mS/cm). With TXC as the coagulant, the residual Sb concentrations met the direct discharge limit (50 μg/L) at all the tested conditions (pH: 3.0–9.0, dosage: 40–100 mg/L). Based on the analyses with potentiometric titrations, X-ray photoelectron spectroscopy, and X-ray diffraction pattern, the binding states between Sb and the flocs of TXC and PFS were investigated. The results reveal that sweep flocculation dominated in the removal of Sb by TXC, whereas charge neutralization played a major role in Sb removal by PFS. As a result, TXC coagulation was robust in a wide pH range and was less sensitive to organic matter. The work here provides a promising approach for the treatment of RO concentrate. © 2022, The Authors. All rights reserved.

关键词： Coagulation

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Submerged Macrophyte Promoted Nitrogen Removal Function of Biofilms in Constructed Wetland

SSRN

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SSRN 2023年

作者： Jiang, Xue Wang, Mengmeng He, Di Zhu, Jinling Yang, Shunqing Fang, Fei Yang, Liuyan State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University Nanjing210023 China School of Resources and Environment Anqing Normal University Anqing246133 China

Biofilm is one of the important factors affecting nitrogen removal in constructed wetlands (CWs). However, the impact of submerged macrophyte on nitrogen transformation of biofilms on leaves of submerged macrophyte and matrix remains poorly understood. In the study, the CWs with Vallisneria natans and with artificial plant were established to investigate the effects of submerged macrophyte on nitrogen transformation and the composition of nitrogen cycling bacteria to probe nitrogen removal functions of biofilms under high ammonium nitrogen (NH4+-N) loading. The average removal rates of total nitrogen and NH4+-N in CW with V. natans reached 71.38% and 82.08%, respectively, showing increases by 24.19% and 28.79% compared with the control with artificial plant. Scanning electron microscope images indicated that high NH4+-N damaged leaf cells, resulting in the release of cellular contents which increased aqueous total organic carbon in CW with V. natans. However, the specific surface area and carrier function of V. natans were unaffected within 25 days. As a kind of natural organic matters, submerged macrophyte provided organic matters for the bacterial growth in biofilms in CW. Bacterial composition analysis revealed that the phylum Proteobacteria was predominant in CW with V. natans. The numbers of nitrifiers and denitrifiers in leaf biofilms reached 1.66 × 105 cells/g and 1.05 × 107 cells/g, as well as 2.79 × 105 cells/g and 7.41 × 107 cells/g in matrix biofilms, respectively. Submerged macrophyte elevated the numbers of nitrogen-converting bacteria and promoted the expression of nitrification (amoA and hao) and denitrification genes (napA, nirS and nosZ) in leaf biofilms and matrix biofilms, which facilitated nitrogen conversion in CW with V. natans. Therefore, this study highlighted the effects of submerged macrophyte on biofilm functions, providing a scientific basis for the nitrogen removal of biofilms in CWs. © 2023, The Authors. All rights reserved.

关键词： Wetlands

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Are Ni-Cd Toxicity Models Derived from Simple Bioassay Applicable to Natural Soils? A Bioassay-Msms Coupling Approach

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SSRN 2022年

作者： Lin, Lu Zhu, Bojing Qu, Xiaoze Gu, Xueyuan State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University Nanjing China

The application of terrestrial toxicity models to real soil environments is a challenge due to the heterogeneity of soil. We presented here a novel bioassay-geochem-model coupling approach to predict the bioaccumulation and toxicity of a metal mixture in different soils. Equations describing dose-accumulation and dose-toxicity relationships of Cd-Ni mixtures to wheat root elongation were generated using a standard sand culture bioassay. A geochemical multi-surface speciation model (MSM) with default parameters was employed to predicted the dissolved metal contents Cdis of three soils collected in China with different properties. Several toxicity models (TU/CAM + FIAM/BLM/GCSM) were screened to identify the one yielding the most accurate predictions. The results showed that metal bioaccumulation was better predicted by the MSM-Cdis integrated with the dose-accumulation equation (RMSE © 2022, The Authors. All rights reserved.

关键词： Forecasting

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Modeling of wintertime regional formation of secondary organic aerosols around Beijing: sensitivity analysis and anthropogenic contributions

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Carbon Research 2023年第1期2卷 1-19页

作者： Zhang, Yuepeng Huang, Huiying Qin, Weihua Yu, Qing Sun, Yuewei Cheng, Siming Ahmad, Mushtaq Ouyang, Wei Soyol-Erdene, Tseren-Ochir Chen, Jing State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Beijing Normal University Beijing100875 China Center of Atmospheric Environmental Studies Beijing Normal University Beijing100875 China Department of Environmental and Forest Engineering School of Engineering and Applied Sciences National University of Mongolia Ulaanbaatar14201 Mongolia

Modeling of secondary organic aerosol (SOA) has remained a big challenge due to the various precursors and complex processes involved. In this study, the WRF-CAMx model was used to predict the ambient SOA concentrations in urban Beijing as well as the North China Plain (NCP) during a polluted period in winter. To identify the major uncertainties and improve the model performance, a series of model tests were performed to assess the sensitivity of model prediction to the key factors. Then the sources of SOA in Beijing were identified using the optimized model. Both the volatility basis set (VBS) approach and the two-product approach were used for SOA simulation. Although the modeled SOA was underpredicted compared with the SOA estimated through filter-based measurements, the VBS scheme produced higher SOA than the traditional two-product scheme. According to the sensitivity tests with the VBS scheme, the emissions of volatile organic compounds (VOC) and intermediate volatility organic compounds (IVOC) as well as the oxidant levels were the key factors that affected SOA prediction. Based on the optimized simulation scenario, the potential contributions from different anthropogenic sources and source areas were identified, with over 80% of SOA in urban Beijing from regional transport of SOA or its precursors from the surrounding areas during the polluted period. Residential emission in the North China Plain appeared as the dominant source of SOA in urban Beijing from the perspective of regional contribution. Graphical Abstract: [Figure not available: see fulltext.] © 2023, The Author(s).

关键词： Sensitivity analysis

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A 3D MIL-101@rGO composite as catalyst for efficient conversion of straw cellulose into valuable organic acid

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Chinese Chemical Letters 2022年第5期33卷 2573-2578页

作者： Yuan Su Mengchu Lu Ruidian Su Weizhi Zhou Xing Xu Qian Li School of Mathematic and Quantitative Economics Shandong University of Finance and EconomicsJi’nan 250014China Shandong Key Laboratory of Water Pollution Control and Resource Reuse School of Environmental Science and EngineeringShandong UniversityQingdao 266200China School of Civil Engineering Shandong UniversityJi’nan 250100China

Efficient conversion of straw cellulose to chemicals or fuels is an attracting topic today for the utiliza-tion of biomass to substitute for fossil *** development of catalysts is of vital *** this work,a composite catalyst metal-organic frameworks(MOFs)immobilized on three-dimensional reduced graphene oxide(3D-rGO)were synthesized by in situ growth of the MIL-101(Cr)within the 3D-rGO *** supporting of 3D-rGO guaranteed the dispersion and acid site density of MIL-101(Cr).The MIL-101(Cr)@3D-rGO nanocomposite possesses excellent catalytic activity,stability,recyclability and is an idea catalyst for the efficient degradation of straw cellulose into formic acid(FA),acetic acid(AA)and oxalic acid(OA).A maximum FA conversion rates of 95.36%was obtained by using MIL-101(Cr)@3D-rGO(1:1)as catalyst and hydrothermal reaction at mild conditions of 200°C for 1h in alkaline aqueous *** MIL-101(Cr)@3D-rGO nanocomposite can be reused with high catalytic activity without any collapse of structure or leaching of chromium.

关键词： Straw cellulose MIL-101(Cr) Three-dimensional graphene Catalystic conversion Organic acid

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Bio-based alternatives to plastic drinking straws: are they more environmentally benign and consumer preferred?

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Carbon Research 2023年第1期2卷 1-14页

作者： Liang, Yinglin He, Jiazhou Zhuang, Min Chen, Fayuan Yang, Kui Ma, Jinxing Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education School of Ecology Environment and Resources Guangdong University of Technology Guangzhou510006 China Analysis and Test Center Guangdong University of Technology Guangzhou510006 China State Key Laboratory of Heavy Oil Processing State Key Laboratory of Petroleum Pollution Control China University of Petroleum-Beijing Beijing102249 China

The global production of nondegradable catering straws has skyrocketed due to their versatile properties, which results in significant CO2 emissions and pollution of the ecological system. While paper and polylactic acid straws have gained increasing popularity in the beverage industry, there needs to be more investigation of the vital product properties determining their hedonic differences. This study systematically compared the properties of paper, polylactic acid and plastic straws, and their impacts on the consumer experience and willingness. Results showed that the open structure of paper straws prompted water penetration and absorption, reaching a water absorption of 30% after 10-min wetting, which might affect the taste of the drink. In contrast, the compact polymer matrices of polylactic acid straws prevented mass exchange in their use for drinking but retarded product biodegradation under natural conditions. Results of consumer testing showed that while the participants had a comparable liking of paper and polylactic acid straws to insert into a drink (i.e., 4.16 and 4.47 out of 5, respectively), the intrinsic difference was covered up by the open-ended capping for beverages. For the "fully sealed on top" dataset, paper straws dropped to 3.46, while that for polylactic acid straws remained at 4.70. Furthermore, a biodegradable straw easily inserted into a drink without fracture may positively prompt merchants’ revenue. This study is expected to pave the way for the advancement and widespread use of bio-based products. Graphical Abstract: [Figure not available: see fulltext.]. © 2023, The Author(s).

关键词： Biodegradation

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