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Three-Dimensional Cobalt Hydroxide Hollow Cube/Vertical Nanosheets with High Desalination Capacity and Long-Term Performance Stability in Capacitive Deionization

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Research 2021年第1期2021卷 606-619页

作者： Yuecheng Xiong Fei Yu Stefanie Arnold Lei Wang Volker Presser Yifan Ren Jie Ma State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China Research Center for Environmental Functional Materials College of Environmental Science and EngineeringTongji University1239 Siping RoadShanghai 200092China College of Marine Ecology and Environment Shanghai Ocean UniversityShanghai 201306China INM-Leibniz Institute for New Materials 66123 SaarbrückenGermany Department of Materials Science and Engineering Saarland University66123 SaarbrückenGermany Saarene-Saarland Center for Energy Materials and Sustainability 66123 SaarbrückenGermany Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China

Faradaic electrode materials have significantly improved the performance of membrane capacitive deionization,which offers an opportunity to produce freshwater from seawater or brackish water in an energy-efficient ***,Faradaic materials hold the drawbacks of slow desalination rate due to the intrinsic low ion diffusion kinetics and inferior stability arising from the volume expansion during ion intercalation,impeding the engineering application of capacitive ***,a pseudocapacitive material with hollow architecture was prepared via template-etching method,namely,cuboid cobalt hydroxide,with fast desalination rate(3.3 mg(NaCl)·g^(-1)(h-Co(OH)2)·min^(-1)at 100 mA·g^(-1))and outstanding stability(90%capacity retention after 100 cycles).The hollow structure enables swift ion transport inside the material and keeps the electrode intact by alleviating the stress induced from volume expansion during the ion capture process,which is corroborated well by in situ electrochemical dilatometry and finite element ***,benefiting from the elimination of unreacted bulk material and vertical cobalt hydroxide nanosheets on the exterior surface,the synthesized material provides a high desalination capacity(117±6 mg(NaCl)·g^(-1)(h-Co(OH)2)at 30 mA·g^(-1)).This work provides a new strategy,constructing microscale hollow faradic configuration,to further boost the desalination performance of Faradaic materials.

关键词： electrode cobalt Cube

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Degradation of Odorous 2,4,6-Trichloroanisole in Chlorinated Water by Uv-Led/Chlorination: Kinetics and Influence Factors

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SSRN 2022年

作者： Zhang, Yun-Lu Lin, Yi-Li Zhang, Tian-Yang Lu, Yong-Shan Zhou, Xiao-Yang Liu, Zhi Zheng, Zheng-Xiong Xu, Meng-Yuan Xu, Bin State Key Laboratory of Pollution Control and Resource Reuse Key Laboratory of Yangtze Water Environment Ministry of Education College of Environmental Science and Engineering Tongji University Shanghai200092 China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092 China Department of Safety Health and Environmental Engineering National Kaohsiung University of Science and Technology Kaohsiung824 Taiwan

2,4,6-Trichloroanisole (2,4,6-TCA) has aroused a special concern for their odor problem and potential threats. In this study, the degradation of 2,4,6-TCA by UV/chlorination with different UV light sources was compared, including low-pressure mercury lamp (LPUV, 254 nm) and ultraviolet light-emitting diode (UV-LED, 275 and 285 nm). The maximum removal of 2,4,6-TCA can be achieved by 275 nm UV-LED/chlorination in neutral and alkaline conditions was 80.0%. The reaction, kinetics and water matrix parameters on 2,4,6-TCA degradation were also evaluated. During UV-LED (275 nm)/chlorination, 2,4,6-TCA degradation was mainly caused by direct UV photolysis and indirect hydroxyl radical (HO•) oxidation, while reactive chlorine radicals (RCSs) had a negligible contribution. The second-order rate constant between HO• and 2,4,6-TCA was determined as 3.1×109 M-1s-1. Increasing initial chlorine dosage and decreasing 2,4,6-TCA concentration or pH value signiﬁcantly promoted 2,4,6-TCA degradation during UV/chlorination process. The presence of natural organic matter (NOM) and bicarbonate (HCO3-) can inhibit 2,4,6-TCA degradation, while chloride ion (Cl-) had a negligible effect. The kinetic model for 2,4,6-TCA degradation was established and validated, and the degradation pathways were proposed based on the identified intermediates. Furthermore, UV-LED (275 nm)/chlorination also exhibited a promising effect on 2,4,6-TCA removal in real water, which can be used to control 2,4,6-TCA pollution and odor problems. © 2022, The Authors. All rights reserved.

关键词： Chlorine

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Electro-Enhanced Rapid Separation of Nanosized Oil Droplets from Emulsions Via the Superhydrophilic Micro-Sized Pore Membrane

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SSRN 2022年

作者： Zheng, Weiwei Xu, Jingcheng Wang, Liya Zhang, Jialu Chu, Wenhai Liu, Jia Lu, Lijun Cai, Chen Peng, Kaiming Huang, Xiangfeng College of Environmental Science and Engineering State Key Laboratory of Pollution Control and Resource Reuse Ministry of Education Key Laboratory of Yangtze River Water Environment Tongji University 1239 Siping Road Shanghai200092 China Institution of Carbon Neutrality Tongji University Shanghai China Shanghai Institute of Pollution Control and Ecological Security Tongji University Shanghai China

Waste oil-in-water emulsion is a special and hard-treated oily wastewater produced by several industries. Based on the sieving effect, the use of a membrane is a promising method to separate emulsion, whereas low flux remains a fundamental challenge. In this study, the coupling of an electric field with superhydrophilic fibrous membranes helped separate micro-/nano-emulsions (247–1887 nm) stabilized by a surfactant (100–500 mg/L) with a general applicability. The micro-sized pore membrane (0.634 μm) achieved outstanding rejection of nano-sized oil droplets (247 nm) using an electric field to promote flux (1,202 to 18,388 LMH/bar by 1,429%) and improve effluent quality (oil removal from 97.61% to 99.88%). The reduction of equivalent pore size of membrane by the repulsion of the electrical double layer (EDL) and the promotion of coalescence of oil droplets driven by the Laplace force rooted in the fibrous spindle of the membrane achieved enhanced selectivity. Electrophoretic force and repulsion of EDL mitigated the formation of the filter cake and irreversible fouling, respectively, to promote permeability and antifouling. This research provides a method for the simultaneous promotion of flux and improvement in effluent quality using an electric field, which breaks the limit of the trade-off effect. © 2022, The Authors. All rights reserved.

关键词： Drops

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Evidence for the Occurrence of Feammox Coupled with Nitrate-Dependent Fe(Ii) Oxidation in Natural Enrichment Cultures

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SSRN 2022年

作者： Wang, Wei Ding, Bangjing Hu, Youyou Zhang, Hui He, Yanqing She, Yuecheng Li, Zhengkui State Key Laboratory of Pollution Control and Resource Reuse Nanjing University Nanjing210023 China School of the Environment Nanjing University Nanjing210023 China Key Laboratory of Aquatic Botany and Watershed Ecology Wuhan Botanical Garden Chinese Academy of Sciences Wuhan430074 China

Feammox is a newly discovered process of anaerobic ammonium oxidation driven by Fe(III) reduction. Nitrate-dependent Fe(II) oxidation (NDFO) is the coupling of Fe(II) oxidation and nitrate reduction to produce N2 under anaerobic conditions. It has not been reported whether the coupling of the two reactions exists in natural enrichment. In this study, enrichment culture experiments were carrired out to prove the occurrence of Feammox with NDFO. The results indicate that the removal efficiencies of ammonium nitrogen and total nitrogen in the incubation were about 92.9% and 20% respectively. Organic carbon experiments indicate that sodium acetate can promote the initial NO3--N removal and a low concentration of organic carbon limits the NDFO process because iron-oxidizing bacteria are mixed-nutrients. The added AQDS in the later stage can promote NDFO to remove nitrate, thereby increasing the TN removal efficiency to 50%. 15N-isotope tracer incubations provide direct evidence for the occurrence of Feammox coupled to NDFO, with rates producing 30N2 of Feammox (0.024~0.0288 mg N·L-1·d-1) and NDFO (0.0465~0.0833 mg N·L-1·d-1) in three groups (Wetland/Wheat soil/Sediments). 16S rRNA sequencing further demonstrated that Pseudomonas , Rhodanobacter , Acinetobacter and Thermomonas were the dominant generas among the enrichment cultures, and these bacteria belonged to FeOB and FeRB, which may further promote Feammox coupled to NDFO in the cultivation system. © 2022, The Authors. All rights reserved.

关键词： Nitrates

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Ozone Water Is an Effective Disinfectant for SARS-CoV-2

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Virologica Sinica 2021年第5期36卷 1066-1068页

作者： Xiao Hu Zhen Chen Zhengyuan Su Fei Deng Xinwen Chen Qi Yang Pan Li Quanjiao Chen Jun Ma Wuxiang Guan Rongjuan Pei Yun Wang CAS Key Laboratory of Special Pathogens and Biosafety Wuhan Institute of VirologyCenter for Biosafety Mega-ScienceChinese Academy of SciencesWuhan 430071China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Virology Wuhan Institute of VirologyCenter for Biosafety Mega-ScienceChinese Academy of SciencesWuhan 430071China Guangzhou Institutes of Biomedicine and Health Chinese Academy of SciencesGuangzhou 510530China Department of Gastroenterology Guangzhou Women and Children’s Medical CenterGuangzhou 510623China State Key Laboratory of Pollution Control and Resource Reuse School of Environmental Science and EngineeringTongji UniversityShanghai 200092China State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin 150090China

Dear Editor,The severe acute respiratory syndrome coronavirus 2(SARS-Co V-2)is the causative pathogen of the pandemic coronavirus disease 2019(COVID-19),which has infected nearly 90 million people and resulted in 2 million human deaths by the end of the year ***-Co V-2 can survive in aerosols or on the surfaces of various materials for up to 72 h(Ong et al.2020;van Doremalen et al.2020).In China,although the human-to-human transmission pathway is under well control,the fomite transmission pathway now accounts for a significant fraction of new infection ***,environmental disinfection of public areas and workspaces potentially contaminated by SARS-Co V-2 is an important measure to control the spread of COVID-19 by fomite transmission.A disinfectant that is safe and readily available at a low cost is urgently needed to meet environmental disinfection requirements.

关键词： al. acute respiratory

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Monitoring of plankton diversity in Dianchi Lake by environmental DNA technology 3

Monitoring of plankton diversity in Dianchi Lake by environm...

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3rd International Conference on Green Energy and Sustainable Development, GESD 2020

作者： He, Liwei Zhang, Lijuan Yang, Jianghua Zhao, Zheng Zhou, Xiaohua Feng, Qing Zhang, Xiaowei Xu, Shan Environmental Protection Collaborative Research Center Kunming University Kunming650214 China Kunming River and Lake Ecological Health Assessment and Restoration Academician Workstation Kunming650214 China State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China

Surveys of zooplankter and phytoplankton through environmental DNA (eDNA) and metagenomic technology across Dianchi Lake and the estuary of inflowing rivers was conducted, to evaluate the microbial diversity of Dianchi Lake and the estuary of four in flowing rivers. Diversity of plankton and the similarity of dominant species results revealed that the dominant eukaryotic phytoplankton in Dianchi Lake was Bacillatiophyta. The Shannon diversity index values of phytoplankton and zooplankton ranged from 3.68 to 18.36 and 0.54 to 2.49, respectively. The main genus taxa in the Dianchi Lake were similar with the inflowing river. The distribution map of Shannon diversity index gave overall insight into the variation of plankton diversity. The research proved that the eDNA technology was effective in biodiversity monitoring in aquatic ecosystem, and the inflowing river may impose an adverse influence on the ecosystem health of Dianchi Lake. © Published under licence by IOP Publishing Ltd.

关键词： Plankton

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Stabilization of nanoscale zero-valent iron in water with mesoporous carbon(n ZVI@MC)

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Journal of Environmental Sciences 2019年第7期31卷 28-33页

作者： Junming Shi Jing Wang Wei Wang Wei Teng Wei-xian Zhang State Key Laboratory of Pollution Control and Resource Reuse School of Environmental Science and Engineering Tongji University School of Chemical Science and Engineering Tongji University

Two challenges persist in the applications of nanoscale zero-valent iron(nZVI) for environmental remediation and waste treatment: limited mobility due to rapid aggregation and short lifespan in water due to quick oxidation. Herein, we report the nZVI incorporated into mesoporous carbon(MC) to enhance stability in aqueous solution and mobility in porous media. Meanwhile, the reactivity of nZVI is preserved thanks to high temperature treatment and confinement of carbon framework. Small-sized(～16 nm) nZVI nanoparticles are uniformly dispersed in the whole carbon frameworks. Importantly, the nanoparticles are partially trapped across the carbon walls with a portion exposed to the mesopore channels. This unique structure not only is conductive to hold the nZVI tightly to avoid aggregation during mobility but also provides accessible active sites for reactivity. This new type of nanomaterial contains ～10 wt% of iron. The nZVI@MC possesses a high surface area(～ 500 m^2/g) and uniform mesopores(～ 4.2 nm) for efficient pollutant diffusion and reactions. Also, high porosity of nZVI@MC contributes to the stability and mobility of nZVI. laboratory column experiments further demonstrate that nZVI@MC suspension(～4 g Fe/L) can pass through sand columns much more efficiently than bare nZVI while the high reactivity of nZVI@MC is confirmed from reactions with Ni(II). It exhibits remarkably better performance in nickel(20 mg/L) extraction than mesoporous carbon, with 88.0% and 33.0%uptake in 5 min, respectively.

关键词： Mesoporous carbon Nanoscale zero-valent iron Mobility Porous media Heavy metal removal

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Spatial Distribution and Risk Assessment of Pyrethroid Insecticides in Surface Waters of East China Sea Estuaries

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SSRN 2023年

作者： Wang, Rui Cai, MingHong Wang, Feng Zhang, Shengwei Guo, Dongdong Zheng, Hongyuan Ministry of Natural Resources Key Laboratory for Polar Science Polar Research Institute of China 451 Jinqiao Road Shanghai200136 China State Key Laboratory of Marine Pollution Department of Chemistry City University of Hong Kong 999077 Hong Kong State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai200092 China School of Oceanography Shanghai Jiao Tong University 1954 Huashan Road Shanghai200030 China Beijing Key Laboratory of Aqueous Typical Pollutants Control and Water Quality Safeguard School of Environment Beijing Jiaotong University Beijing100044 China

Pyrethroid insecticides are the most commonly used household insecticides and pose substantial risks to marine aquatic organisms. Although many studies have focused on detecting pyrethroid insecticides in the waters and estuaries of the western United states, their distributions within western Pacific estuaries have not been reported. Accordingly, in this study, we used high-throughput organic analyses combined with high volume solid-phase extraction to comprehensively assess 13 pyrethroid insecticides in East China Sea estuaries and Huangpu River. The results demonstrated the presence of various ∑13pyrethroid insecticides in East China Sea estuaries (mean and median values of 8.45 ± 5.57 and 7.78 ng·L-1, respectively), among which cypermethrin is the primary contaminant. The concentrations of ∑12pyrethroid insecticide detected in the surface waters at the Huangpu River (mean 6.70 ng·L-1, outlet 16.4 ng·L-1) were higher than those in the Shanghai estuary (4.70 ng·L-1), suggesting that runoff from inland areas is a notable source of insecticides. Wetlands were found to reduce the amount of runoff containing pyrethroid insecticides that reached the ocean. Several factors influenced pesticide distributions in East China Sea estuaries, and higher proportions were derived from agricultural sources than from urban sources. Permethrin and cypermethrin were the main compounds contributing to a high ecological risk in the estuaries. Consequently, to prevent risks to marine aquatic life, policymakers should aim to reduce insecticide contaminants derived from urban and agricultural sources. © 2023, The Authors. All rights reserved.

关键词： Estuaries

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Effects of iron(hydr)oxides on the degradation of diethyl phthalate ester in heterogeneous(photo)-Fenton reactions

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Journal of Environmental Sciences 2019年第6期31卷 5-13页

作者： Wenjuan Shuai Cheng Gu Guodong Fang Dongmei Zhou Juan Gao Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil Science Chinese Academy of Science University of Chinese Academy of Sciences State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University

This work studied the structural effects of hematite(α-Fe2 O3), 2-line ferrihydrite(HFO) and goethite(α-FeOOH) on diethyl phthalate ester(DEP) degradation. The results showed that the degradation of DEP was faster under 365 nm light irradiation than in the dark in the presence of iron(hydr)oxides. The apparent kinetic rates of DEP degradation followed the order HFO > goethite ≈ hematite in the dark and HFO > hematite > goethite under 365 nm light irradiation. Two pathways governed H2 O2 decomposition efficiency on iron(hydr)oxide surfaces:(1) forming UOH on inherent surface hydroxyl groups(Fe-OH) and(2) producing O2 and H2 O on the surface oxygen vacancies. X-ray photoelectron spectroscopy(XPS) analyses indicated that HFO not only has high Fe-OH content but also has high Vo content, resulting in its low H2 O2 utilization efficiency(η). DEP was degraded through hydrogen abstraction and deesterification, and the major products were(OH)2-DEP, mono-ethyl phthalate(MEP), OH-MEP,and phthalate acid(PA). The study is important in understanding the transformation of phthalate esters in top surface soils and surface waters under ultraviolet light.

关键词： Diethyl phthalate ester Iron(hydr)oxide Hydroxyl radical Heterogeneous Fenton reactions

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Coastal Mudflats as Reservoirs of Antibiotic Resistance Genes (Args) Particularly Extracellular Args: Studies in Eastern China

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SSRN 2022年

作者： Yuan, Qingbin Wang, Xiaolin Fang, Hui Cheng, Yuan Zhang, Xueying Mao, Daqing Luo, Yi College of Environmental Science and Engineering Nanjing Tech University Nanjing211816 China State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria College of Environmental Science and Engineering Nankai University Tianjin300071 China

Despite of key functions as valuable global resources and essential ecological zones interconnecting terrestrial/freshwater and marine habitats, little is known on profiles of antibiotic resistance in coastal mudflats, which is of significance to understand the overall dissemination of antibiotic resistance genes globally. In this study the characteristics of typical antibiotic resistance genes (ARGs), involving both intracellular (iARGs) and extracellular ARGs (eARGs) with different physical states (i.e., adsorbed by solid particles (a-eARGs) and freely present (f-eARGs)) were explored in over 1,000 km of coastal mudflats in Eastern China. Results showed that iARGs and eARGs of both free (f-eARGs) and adsorbed (a-eARGs) states were present. eARGs abundance (sum of a-eARGs and f-eARGs) were significantly higher than iARGs in coastal mudflat, and eARGs were more dominant than those of other habitats (i.e., cropland, seawater, river water and activated sludge). A-eARGs and f-eARGs were highly persistent as reflected by the high throughout based amplicon sequencing. ARGs abundance particularly for eARGs showed an increasing trend of spatial pattern from southern to northern coastal mudflats, reflecting an increased risk of antibiotic resistance dissemination. Despite of higher nutrients and smaller particle size that benefit bacterial survival in northern coastal mudflats, iARGs abundance was not higher than southern coastal mudflats. Rather, the higher salinity significantly increased the transform from iARGs to eARGs, and smaller particle size facilitated the persistence of eARGs in northern coastal mudflats. This study is the first to provide the integrated profile of ARGs of various physical states (iARGs, f-eARGs, a-ARGs) in coastal mudflats, and address the key function of coastal mudflats as eARGs reservoirs. © 2022, The Authors. All rights reserved.

关键词： Reservoirs (water)

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