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Dynamic coupling of ferrihydrite transformation and associated arsenic desorption/redistribution mediated by sulfate-reducing bacteria

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Journal of environmental Sciences 2024年第1期135卷 39-50页

作者： Wenjing Zhou Huiyan Zhu Shiwen Hu Bowei Zhang Kun Gao Zhi Dang Chongxuan Liu state environmental protection key laboratory of Integrated Surface Water-Groundwater Pollution control School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China The key lab of Pollution control and Ecosystem Restoration in Industry Clusters Ministry of EducationSouth China University of TechnologyGuangzhou 510006China

Sulfate-reducing bacteria play an important role in the geochemistry of iron(oxyhydr)oxide and arsenic(As)in natural environments;however,the associated reaction processes are yet to be fully *** this study,batch experiments coupled with geochemical,spectroscopic,microscopic,and thermodynamic analyses were conducted to investigate the dynamic coupling of ferrihydrite transformation and the associated As desorption/redistribution mediated by Desulfovibrio vulgaris(***).The results indicated that *** could induce ferrihydrite transformation via S^(2-)-driven and direct reduction *** the absence of SO_(4)^(2-),*** directly reduced ferrihydrite,and As desorption and re-sorption occurred simultaneously during the partial transformation of ferrihydrite to *** increase in SO_(4)^(2-)loading promoted the S^(2-)-driven reduction of ferrihydrite and accelerated the subsequent mineralogical *** the low and medium SO_(4)^(2-)treatments,ferrihydrite was completely transformed to a mixture of magnetite and mackinawite,which increased the fraction of As in the residual phase and stabilized *** the high SO_(4)^(2-)treatment,although the replacement of ferrihydrite by only mackinawite also increased the fraction of As in the residual phase,22.1%of the total As was released into the solution due to the poor adsorption affinity of As to mackinawite and the conversion of As^(5+)to As^(3+).The mechanisms of ferrihydrite reduction,mineralogy transformation,and As mobilization and redistribution mediated by sulfate-reducing bacteria are closely related to the surrounding SO_(4)^(2-)*** results advance our understanding of the biogeochemical behavior of Fe,S,and As,and are helpful for the risk assessment and remediation of As contamination.

关键词： Sulfate-reducing bacteria Arsenic Ferrihydrite Transformation Redistribution

Efficient photocatalytic NADH regeneration with Rh-loaded Z-scheme mediator-free system

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Chinese chemical Letters 2024年第2期35卷 496-500页

作者： Yi Zhou Yiling He Ming Gao Ningkai Ding Juying Lei Yanbo Zhou state environmental protection key laboratory of environmental risk assessment and control on chemical Process East China University of Science and TechnologyShanghai 200237China National Engineering Research Center of Industrial Wastewater Detoxication and Resource Recovery East China University of Science and TechnologyShanghai 200237China Shanghai Engineering Research Center for Multi-media environmental Catalysis and Resource Utilization East China University of Science and TechnologyShanghai 200237China Shanghai Institute of Pollution control and Ecological Security Shanghai 200092China

Nicotinamide adenine dinucleotide(NADH)regeneration is necessary for the sustainable application of enzymatic *** Rh-based complex[Cp^(*)Rh(bpy)(H)]+has been widely used as an important mediator in NADH regeneration systems,but it is limited by complexity and high ***,a Z-scheme was constructed by loading Rh onto carbon nitride nanosheets/carbon nitride quantum dots(CN-CNQD).The resultant catalyst achieved a high yield of NADH in a mediator-free(M-free)system of 0.283 mmol L^(−1) g^(−1) min^(−1),which is 5.29 times that of pure *** enzyme introduction experiments confirmed that the enzyme active product 1,4-NADH could reach 34.21%selectivity in the M-free *** research revealed that the heterojunction between CNs and CNQDs improved the NADH regeneration activity in the traditional M-involved system,while Rh loading was proved to optimize the yield and selectivity of 1,4-NADH in M-free *** immobilized Rh shows more competitiveness than[Cp^(*)Rh(bpy)(H)]^(+).This study contributes to the construction of an M-free system for further application in greener,lower-cost enzymatic processes.

关键词： Photocatalysis NADH regeneration Mediator-free Carbon nitride Z-scheme

Adsorptive removal of PPCPs from aqueous solution using carbon-based composites:A review

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Chinese chemical Letters 2022年第8期33卷 3585-3593页

作者： Tong Wang Jie He Jian Lu Yi Zhou Zhaohui Wang Yanbo Zhou state environmental protection key laboratory of environmental risk assessment and control on chemical Process East China University of Science and TechnologyShanghai 200237China Shanghai Institute of Pollution control and Ecological Security Shanghai 200092China Shanghai key lab for Urban Ecological processes and Eco-Restoration School of Ecological and Environmental SciencesEast China Normal UniversityShanghai 200241China

Far-ranging and improper uses of pharmaceuticals and personal care products(PPCPs)over the last few decades have led to severe water contamination that imposes serious effects on human beings and the ecological ***,there is an increasing demand for a highly-efficient and environmentally friendly technology for the removal of PPCPs from aqueous *** technology is an appropriate technology to solve this ***-based composites,ranging from modified activated carbon to functionalized biochar,show great potential for this *** review hence elaborates on the environmental occurrences and risks of PPCPs and summarizes the recent progress in removing PPCPs from water using carbon-based *** pore structure,relatively large specific surface area(SSA),abundant surface functional groups,highly aromatic structures and the extra excellent characteristics of the cooperative materials contribute to their outstanding adsorption ***,the biochar-clay material is cost effective and more efficient compared to traditional activated carbon regarding the adsorption of *** the emerging adsorbents,graphene and carbon nanotubes composites show superior adsorption *** adsorption mechanisms,such as electrostatic interactions,hydrogen bonding,and pore filling,are discussed in details.

关键词： Adsorption Carbon-based composites PPCPs Adsorbent Water treatment

Quantum dots enhance Cu^(2+)-induced hepatic L02 cells toxicity

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Journal of environmental Sciences 2010年第12期22卷 1987-1992页

作者： Yuxia Zhao,Kuangfei Lin,Wei Zhang,Lili Liu state environmental protection key laboratory of environmental risk assessment and control on chemical Process,Shanghai 200237,China state environmental protection key laboratory of environmental risk assessment and control on chemical Process Shanghai 200237 China. E-mail: maryzyx@***

As a new class of xenogenous nanoparticle, quantum dots （QDs） possess the potential to co-exist with Cu^2＋ in human liver. The combined toxicity is thus concerned. Considering QDs and Cu^2＋ are known ROS （reactive oxygen species） inducer, we investigated the combined oxidative stress and corresponding protective strategy using human hepatic L02 cells. The results demonstrated that the presence of a small amount of MPA-CdTe QDs （2 μg/mL） in a Cu^2＋ solution （2.5-20 μg/mL） resulted in a higher toxicity with up to 8-fold cell viability decrease, which was accompanied by cell morphology changes. The combined toxicity was then confirmed as ROS associated oxidative stress with up to 300% and 35% increase of the intracellular ROS level and glutathione S-transferase （GST） activity, respectively. N-acetylcysteine （NAC） can also provide almost complete protection against the induced toxicity. Therefore, the ROS associated oxidant injury might be responsible for the QDs-Cu^2＋/Cu^2＋ induced toxicity and could be balanced through cytoprotective antioxidant enzyme GST.

关键词： quantum dots hepatic L02 cell reactive oxygen species glutathione S-transferase

Coking wastewater treatment for industrial reuse purpose: Combining biological processes with ultrafiltration, nanofiltration and reverse osmosis

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Journal of environmental Sciences 2013年第8期25卷 1565-1574页

作者： Xuewen Jin Enchao Li Shuguang Lu Zhaofu Qiu Qian Sui state environmental protection key laboratory of environmental risk assessment and control on chemical Process East China University of Science and Technology Shanghai Baosteel chemical Co. Ltd.

A full-scale plant using anaerobic, anoxic and oxic processes （A1/A2/O）, along with a pilot-scale membrane bioreactor （MBR）, nanofiltration （NF） and reverse osmosis （RO） integrated system developed by Shanghai Baosteel chemical Co. Ltd., was investigated to treat coking wastewater for industrial reuse over a period of one year. The removals reached 82.5% （COD）, 89.6% （BOD）, 99.8% （ammonium nitrogen）, 99.9% （phenol）, 44.6% （total cyanide （T-CN））, 99.7% （thiocyanide （SCN-）） and 8.9% （fluoride）, during the A1/A2/O biological treatment stage, and all parameters were further reduced by over 96.0%, except for fluoride （86.4%）, in the final discharge effluent from the currently operating plant. The pilot-scale MBR process reduced the turbidity to less than 0.65 NTU, and most of the toxic organic compounds were degraded or intercepted by the A1/A2/O followed MBR processes. In addition, parameters including COD, T-CN, total nitrogen, fluoride, chloride ion, hardness and conductivity were significantly reduced by the NF-RO system to a level suitable for industrial reuse, with a total water production ratio of 70.7%. However, the concentrates from the NF and RO units were highly polluted and should be disposed of properly or further treated before being discharged.

关键词： coking wastewater industrial water reuse biological treatment MBR NF-RO

Precursors and potential sources of ground-level ozone in suburban Shanghai

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Frontiers of environmental Science & Engineering 2020年第6期14卷 5-16页

作者： Kun Zhang Jialuo Xu Qing Huang Lei Zhou Qingyan Fu Yusen Duan Guangli Xiu state environmental protection key laboratory of environmental risk assessment and control on chemical processes/School of Resources&environmental Engineering East China University of Science and TechnologyShanghai 200237China School of environmental and chemical Engineering Shanghai UniversityShanghai 200444China Shanghai environmental protection key laboratory for environmental Standard and risk Management of chemical Pollutants School of Resources&Environmental EngineeringEast China University of Science and TechnologyShanghai 200237China Shanghai Institute of Pollution control and Ecological Security Shanghai 200092China Shanghai environmental Monitoring Center Shanghai 200235China

A high level of ozone(O3)is frequently observed in the suburbs of Shanghai,the reason for this high levei remains *** obtain a detailed insight on the high level of 03 during summer in Shanghai,03 and its precursors were measured at a suburban site in Shanghai from July 1;2016 to July 31,*** the Hybrid Single-Particle Lagrangian Integrated Trajectory,(HYSPLIT)model and concentration weighted trajectories(CW T),we found that Zhejiang province was the main potential *** 03 in suburban *** the sampling site was cotrolled by south-westerm winds exceeding 2 m/s,the O3-rich air masses from upwind regions(such as Zhejiang province)could be transported to *** *** propylene-equivalent concentation(PEC)and ozone formation potential(OFP)were,further calculated for each vOC species,and the resuts suggested that propylene,(m+p)-xylene,*** played dominant roles in O3 *** Ozone Isopleth Plotting Research(OZIPR)model was used to reveal the impact ofO;precursors on O3 formation,and 4 base-cases *** to adjust the model *** average *** 18.20%was achieved between the simulated and observed 03 *** 03 isopleth diagram ilustrated that 03 fomatin in July 2016 was in VOC-senstive regime,although the VOCNO,ratio was greater than *** intoducing sensitivity(S),a sensitvity analysis was performed for 03 *** *** 03 formation was senstive to propylene,(m+p)-xylene,e,o-xylene and *** results provide theoretical suppot for 0;plluton treatment in Shanghai.

关键词： Ozone OZIPR Volatile organic compounds Shanghai HYSPLIT

CO_(2) capture and in-situ conversion: recent progresses and perspectives

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Green chemical Engineering 2022年第3期3卷 189-198页

作者： Bin Shao Yun Zhang Zheyi Sun Jianping Li Zihao Gao Zhicheng Xie Jun Hu Honglai Liu School of Chemistry and Molecular Engineering East China University of Science and Technology130 Meilong RoadShanghai200237China ECUST School of Carbon Neutrality Future Technology East China University of Science and Technology130 Meilong RoadShanghai200237China state environmental protection key laboratory of environmental risk assessment and control on chemical Process East China University of Science and Technology130 Meilong RoadShanghai200237China

Global warming caused by excess carbon dioxide(CO_(2))emission has been a focus of the *** development of neutral carbon technologies becomes a strategic choice for the sustainable human *** CO_(2) capture and conversion(iCCC)technology can simultaneously convert the captured CO_(2) from flue gas into value-added chemicals,which saves great energies and expenses incurred in CO_(2) compression and transportation processes of conventional carbon capture,utilization,and storage(CCUS)*** present review criti-cally discusses the dual-function materials(DFMs)and the iCCC technology at intermediate temperature for methane production and high temperature for syngas *** design of reactor and optimization of operation conditions are emphasized from the perspective of industrial *** dual-fixed-bed reactors mode by switching the flue gas and reactant gases,and the dual-fluidized-bed reactors mode by the circulation of DFMs particles are comparatively *** hope this review can stimulate further studies including designing and fabricating feasible DFMs,exploring realistic catalytic process for CO_(2) conversion to high value-added chemicals,developing workable reactor modes and optimizing operation conditions,and establishing industrial demonstration for real applications of iCCC technology in the future.

关键词： CO_(2)capture In-situ conversion Dual-function materials Process design Industrial applications

Oxygen dependent oxidation of trimethoprim by sulfate radical:Kinetic and mechanistic investigations

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Chinese chemical Letters 2021年第10期32卷 3164-3168页

作者： Xuerui Yang Xi Ding Lei Zhou Yuefei Ji Guangli Xiu Shanghai environmental protection key laboratory for environmental Standard and risk Management of chemical Pollutants School of Resources&Environmental EngineeringEast China University of Science and TechnologyShanghai 200237China state environmental protection key lab of environmental risk assessment and control on chemical processes School of Resources&Environmental EngineeringEast China University of Science and TechnologyShanghai 200237China Shanghai Institute of Pollution control and Ecological Security Shanghai 200092China College of Resources and environmental Sciences Nanjing Agricultural UniversityNanjing 210095China

Trimethoprim(TMP)is a typical antibiotic to treat infectious disease,which is among the most commonly detected antibacterial agents in natural waters and municipal *** the present study,the impacts of dissolved oxygen(DO)on the oxidation efficiency and pathways of TMP by reaction with sulfate radicals(SO_(4)^(-1))were *** results revealed that the presence of DO was favourable for TMP ***,TMP would react initially with SO_(4)^(-1)via electron-transfer process to form a carbon-centered *** the absence of oxygen,the carbon-centered radical could undergo hydrolysis to produceα-hydroxytrimethoprim(TMPàOH),followed by the further oxidation which generatedα-ketotrimethoprim(TMP=O).However,in the presence of oxygen,the carbon-centered radical would alternatively combine with oxygen,leading to a sequential reaction in which peroxyl radical and a tetroxide were formed,and finally generated TMPàOH and TMP=O *** proposed pathways were further confirmed by density functional theory(DFT)*** results obtained in this study would emphasize the significance of DO on the oxidation of organic micropollutants by SO_(4)^(-1).

关键词： Antibiotics Sulfate radicals Dissolved oxygen Hydroxylation DFT calculations

Identification and ecotoxicity assessment of intermediates generated during the degradation of clofibric acid by advanced oxidation processes

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Frontiers of environmental Science & Engineering 2012年第4期6卷 445-454页

作者： Wenzhen LI Yu DING Qian SUI Shuguang LU Zhaofu QIU Kuangfei LIN state environmental protection key laboratory of environmental risk assessment and control on chemical Process Shanghai Key Laboratory of Functional Materials ChemistryEast China University of Science and TechnologyShanghai 200237China Datang Energy Corporation Hulunbeier 021008China

The aim of this study was to identify the intermediates in clofibric acid degradation under various advanced oxidation processes, namely ultraviolet （UV）, UV/H2O2, vacuum ultraviolet （VUV）, VUV/H2O2, and solar/TiO2 processes, as well as to assess the toxicity of these intermediates. Eleven intermediates have been detected by gas chromatography-mass spectrometer, most of which were reported for the first time to our best knowledge. Combining the evolution of the dissolved organic carbon, CF and specific ultraviolet absorption at 254 nm, it could be deduced that cleavage of aromatic ring followed by dechlorination was the mechanism in solar/ TiO2 process, while dechlorination happened first and accumulation of aromatic intermediates occurred in the other processes. Different transformation pathways were proposed for UV-, VUV-assisted and solar/TiO2 processes, respectively. The acute toxicity was evaluated by means of Photobacterium phosphoreurn T3 spp. bioassay. It was believed that aromatic intermediates increased the toxicity and the ring-opening pathway in solar/TiO2 process could relieve the toxicity.

关键词： clofibric acid advanced oxidation processes intermediates toxicity Photobacterium phosphoreum T3 spp.