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Evidence on the causes of the rising levels of COD_(Mn) along the middle route of the South-to-North Diversion Project in China:The role of algal dissolved organic matter

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Journal of environmental Sciences 2022年第3期34卷 281-290页

作者： Chao Wang Hong Zhang Pei Lei Xiaokang Xin Aijing Zhang Wei Yin Changjiang Water Resources Protection Institute Wuhan 430051China State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China State Key Laboratory of Pollution Control and Resources Reuse School of the EnvironmentNanjing UniversityNanjing 210046China Construction and Administration Bureau of South-to-North Water Diversion Middle Route Project Beijing 100038China Key Laboratory cf Ecological Regulation ofNon-point Source Pollution in Lake and Reservoir Water Sources Wuhan 430051China

As the biggest inter-basin water transfer scheme in the world,the South-to-North Water Diversion Project(SNWD) was designed to alleviate the water crisis in North *** main channel of the middle route of the SNWD is of great concern in terms of the drinking water *** this study,we tested the hypothesis that the dissolved organic matter(DOM) derived from the planktonic algae causes the rising levels of COD_(Mn) along the middle route by monitoring data on water quality(2015-2019,monthly resolution).The results showed that algal density in the main channel increased along the channel and was significantly correlated with COD_(Mn)(p <0.01).Five fluorescent components of DOM,including tyrosine-like(14.85%),tryptophan-like(22.48%),microbial byproduct-like(26.34%),fulvic acid-like(11.41%),and humic acid-like(24.92%) components,were *** level of tyrosine-like components increased along the channel and was significantly correlated with algal density(p<0.01),indicating that algae significantly changed the level of DOM in the *** decomposition and metabolism were found to be the main mechanisms that drive the changes in COD_(Mn).Therefore,controlling algal density would be an important measure to prevent further increase in CODMn and for the guarantee of excellent water quality.

关键词： Dissolved organic matter(DOM)Algae COD_(Mn) South-to-North Diversion Project Danjiangkou reservoir Three-dimensional fluorescence excitation emission matrix spectroscopy(3D-EEMs)

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Potential Assessment of Photovoltaic Power Generation in China Based on High Temporal Resolution Scale

Potential Assessment of Photovoltaic Power Generation in Chi...

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2024 IEEE IAS Industrial and Commercial Power System Asia, I and CPS Asia 2024

作者： Huang, Xi Wang, Jiaxing Shi, Jie Li, Yan Wang, Yuming School of Mathematics Southeast University Nanjing China School of Environment Tsinghua University State Key Joint Laboratory of Environment Simulation and Pollution Control Beijing China School of Physics and Technology University of Jinan Jinan China College of Environmental Science and Engineering Tongji University Shanghai China

ISBN: (纸本)9798350352290

Photovoltaic (PV) power generation in China has experienced promising growth and will further become a significant sector of the power system in the near future. To further utilize the variable uncertain PV resources, the PV power generation resource assessment focusing on a high temporal resolution would greatly assist China in achieving its dramatic solar development goals. In this paper, the installed PV potential of every province in China is measured by the Energy Research Institute of the National Development and Reform Commission based on the radiation intensity and temperature data with a time step of 15 minutes. Thus the real-time PV power output of 31 provinces, along with the assessment results show that China's PV power potential is 4567.0 TWh/year, which is approximately equivalent to 60% of the total social electricity consumption in 2019;as for the spatial distribution, Inner Mongolia, Xinjiang, and Tibet possess the largest PV potential in China, with power generation potential of 1281.6 TWh/year, 576.0 TWh/year, and 394.3 TWh/year, respectively;there are large quarterly and monthly varieties in the availability of PV power generation in each province. There are large monthly and quarterly differences in the temporal availability of PV power generation in each province, with the difference between the highest availability month and the lowest availability month in every province generally being larger than 150%, and the PV output also fluctuates considerably during the day in different seasons in each province. © 2024 IEEE.

关键词： Photovoltaics

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AQDS Enhances Degradation of BDE-47 by Promoting Shewanella oneidensis MR-1-mediated Fenton Reaction with Fe(III)-containing Minerals

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Journal of Earth Science 2025年

作者： Yongguang Jiang Siqi Zhu Zhou Jiang Yiran Dong Liang Shi School of Environmental Studies， China University of Geosciences State Key Laboratory of Biogeology and Environmental Geology， China University of Geosciences Hubei Key Laboratory of Yangtze Catchment Environmental Aquatic Science， China University of Geosciences State Environmental Protection Key Laboratory of Source Apportionment and Control of Aquatic Pollution， Ministry of Ecology and Environment， China University of Geosciences(Wuhan)

Electron shuttles are widespread in the environments and play important role in microbe-mineral interaction. This study investigated the effects of a model electron shuttle (i.e.， anthraquinone-2， 6-disulfonate， AQDS) on Shewanella oneidensis MR-1-mediated Fenton reaction and subsequent degradation of 2， 2′， 4， 4′-tetrabrominated diphenyl ether (BDE-47). Three Fe(III)-containing minerals， namely， ferrihydrite， goethite and nontronite， were used as electron acceptors and Fe(II) sources. With each mineral， additions of 0.01 – 1 mM AQDS in the reactions significantly enhanced Fe(III) reduction by S. oneidensis MR-1 and increased the amounts of Fe(II) produced in anoxic phase. As a result， the amounts of cumulative ·OH formed in oxic phase were increased by 10% – 287%. Regression analysis revealed that ·OH cumulation has significant linear correlation with sorbed Fe(II) but not aqueous and structural Fe(II). This finding may be ascribed to the higher reactivity of sorbed Fe(II) in oxygenation than the latter two types of Fe(II). With more ·OH， the degradation efficiency of BDE-47 was elevated by 31% – 173%. Collectively， AQDS enhances ·OH formation and BDE-47 degradation by promoting production of Fe(II)， particularly sorbed Fe(II) in S. oneidensis MR-1-mediated Fenton reaction with Fe(III)-containing minerals.

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Ammonia removal from low-strength municipal wastewater by powdered resin combined with simultaneous recovery as struvite

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Frontiers of environmental Science & Engineering 2021年第1期15卷 125-134页

作者： Kuo Fang Fei Peng Hui Gong Huanzhen Zhang Kaijun Wang State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China School of Water Resources&Environment China University of GeosciencesBeijing 100083China

Low-strength municipal wastewater is considered to be a recoverable nutrient resource with economic and environmental ***,various technologies for nutrient removal and recovery have been *** this paper,powdered ion exchange resin was employed for ammonia removal and recovery from imitated low-strength municipal *** effects of various working conditions(powdered resin dosage,initial concentration,and pH value)were studied in batch experiments to investigate the feasibility of the approach and to achieve performance *** maximum adsorption capacity determined by the Langmuir model was 44.39 mg/g,which is comparable to traditional ion exchange ***,the effects of co-existing cations(Ca^(2+),Mg^(2+),K^(+))were *** on the above experiments,recovery of ammonia as struvite was successfully achieved by a proposed two-stage crystallization process coupled with a powdered resin ion exchange *** electron microscopy(SEM)and X-ray diffractometry(XRD)results revealed that struvite crystals were successfully gained in alkaline conditions(pH=10).This research demonstrates that a powdered resin and two-stage crystallization process provide an innovative and promising means for highly efficient and easy recovery from low-strength municipal wastewater.

关键词： Ammonia removal and recovery Powdered resin Crystallization process Struvite Co-existing cations

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Evaluation of laboratory and environmental exposure systems for protein modification upon gas pollutants and environmental factors

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Journal of environmental Sciences 2024年第9期143卷 213-223页

作者： Zhiwei Pan ShiyiWu Qiaoze Zhu Fobang Liu Yongjian Liang Chenglei Pei Haoyu Jiang Yingyi Zhang Senchao Lai The Key Lab of Pollution Control and Ecosystem Restoration in Industry Clusters Ministry of EducationSchool of Environment and EnergySouth China University of TechnologyGuangzhou 510006China Department of Environmental Science and Engineering Xi’an Jiaotong UniversityXi’an 710049China Guangzhou Sub-branch of Guangdong Ecological and Environmental Monitoring Center Guangzhou 510006China State Key Laboratory of Organic Geochemistry Guangdong Key Laboratory of Environmental Protection and Resources Utilizationand Joint Laboratory of the Guangdong-Hong Kong-Macao Greater Bay Area for the EnvironmentGuangzhou Institute of GeochemistryChinese Academy of SciencesGuangzhou 510640China School of Marine Sciences Sun Yat-sen UniversityZhuhai 519082China

Chemical modifications of proteins induced by ambient ozone(O_(3))and nitrogen oxides(NOx)are of public health concerns due to their potential to trigger respiratory *** laboratory and environmental exposure systems have been widely used to investigate their relevant mechanism in the *** bovine serum albumin(BSA)as a model protein,we evaluated the two systems and aimed to reduce the uncertainties of both the reactants and products in the corresponding kinetic *** the laboratory simulation system,the generated gaseous pollutants showed negligible *** layers of BSA were coated on the flow tube with protein extraction recovery of 87.4%.For environmental exposure experiment,quartz fiber filter was selected as the upper filter with low gaseous O_(3)(8.0%)and NO_(2)(1.7%)losses,and cellulose acetate filter was appropriate for the lower filter with protein extraction efficiency of 95.2%.The protein degradation process was observed without the exposure to atmospheric oxidants and contributed to the loss of protein monomer mass fractions,while environmental factors(e.g.,molecular oxygen and ultraviolet)may cause greater protein monomer *** on the evaluation,the study exemplarily applied the two systems to protein modification and both showed that O_(3) promotes the protein oligomerization and nitration,while increased temperature can accelerate the oligomerization and increased relative humidity can inhibit the nitration in the environmental exposure *** developed laboratory and environmental systems are suitable for studying protein modifications formed under different atmospheric conditions.A combination of the two will further reveal the actual mechanism of protein modifications.

关键词： Protein modification laboratory simulation environmental exposure Oligomerization Nitration

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How small is big enough? Big data-driven machine learning predictions for a full-scale wastewater treatment plant

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Water Research 2025年 274卷 123041页

作者： Ma, Yanyan Qiao, Yiheng Chen, Mengxue Rui, Dongni Zhang, Xuxiang Liu, Weijing Ye, Lin State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University Nanjing210023 China Nanjing Gaoke Environmental Technology Co. Ltd. Nanjing210038 China Jiangsu Provincial Key Laboratory of Environment Engineering Jiangsu Provincial Academy of Environmental Science Nanjing210036 China

Wastewater treatment plants (WWTPs) generate vast amounts of water quality, operational, and biological data. The potential of these big data, particularly through machine learning (ML), to improve WWTP management is increasingly recognized. However, the costs associated with data collection and processing can rise sharply as datasets grow larger, and research on determining the optimal data volume for effective ML application remains limited. In this study, we comprehensively analyzed water quality, operational, and biological data collected from a full-scale WWTP over 970 days. Our results demonstrate that ML models can predict not only operational and water quality parameters (concentrations of dissolved oxygen and effluent chemical oxygen demand) but also the abundances of functional bacteria. Notably, we discovered that increasing data volume does not always improve model performance, and that data collection intervals do not need to be excessively small, as moderate intervals can still yield reliable predictions. These findings suggest that excessively large datasets may not be necessary for effective ML predictions in WWTPs. Overall, this study underscores the importance of optimizing dataset size to balance computation efficiency and prediction accuracy, providing valuable insights into data management strategies that can enhance the operational efficiency and sustainability of WWTPs. © 2024 Elsevier Ltd

关键词： Data accuracy

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Stability Optimization of Iron-Based Catalysts: Application of Cr-Enriched Alloy Steel Catalyst in Ozonation Pharmaceutical Wastewater

SSRN

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SSRN 2024年

作者： Xiao, Siqi An, Wenhui Ma, Luming State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai200092 China

Catalytic ozonation for advanced treatment of industrial wastewater has proved to be effective, and the stability of the catalyst is crucial for the long-term application of the ozonation process in practical engineering. In this study, the electrochemical characteristics of four iron shavings: alloy steels (38CrMoAl and 40Cr) and carbon steels (A3 and 45#) were investigated, and a new citric acid-optimized H2O2 modification method was proposed. The low open circuit potential (OCP) of carbon steels indicated that they have higher reactivity and require shorter modification times. The higher the OCP of alloy steels, the more H2O2 concentration was required to enhance modification efficiency. By adding citric acid, the rapid modification of alloy steel was achieved, and the catalysts exhibited lower passivation current (Ip), indicating a lower rate of substrate loss and a longer lifetime of alloy steel catalysts. Furthermore, Cr enrichment occurred in the oxide layer of alloy steel catalysts. The Cr/Fe (atomic ratio) in oxide layer for 38CrMoAl and 40Cr increased from 0.018 to 0.040 and from 0.010 to 0.037, respectively. The presence of CrOOH and Cr2O3 within the oxide layer to reinforce the layer’s overall structural integrity and enhance its protection for the internal substrate, making the catalysts more resistant to adapt to high-salinity wastewater. Through laboratory tests, it was found that among the four catalysts, 38CrMoAl showed the highest stability and good catalytic activity with low iron loss concentration. Therefore, the pilot-scale application effect of 38CrMoAl catalyst was evaluated. In the advanced treatment of pharmaceutical wastewater, the Chemical oxygen demand (COD) and total organic carbon (TOC) removal was 56.3% and 32.4%, respectively. These results showed that the stability of catalyst can be improved by optimizing the selection of steel, and the introduction of citric acid achieved Cr enrichment effect and amplified the potential stability

关键词： Stability

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Bottom-up synthesis of semiconductive carbonaceous nanosheets on hematite photoanode for photoelectrochemical water splitting

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Nano Research 2022年第1期15卷 627-636页

作者： Guosheng Li Zhuofeng Hu School of Environment Science and Engineering Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation TechnologySun Yat-sen UniversityGuangzhou 510275China College of Environmental and Chemical Engineering Zhaoqing UniversityZhaoqing 526061China State Key Laboratory of Photocatalysis on Energy and Environment College of ChemistryFuzhou UniversityFuzhou 350116China

Coupling two-dimention carbon materials like graphene on photodelectrode can achieve high-efficiency photoelectrochemical ***-up synthesis of carbon-based two-dimensional materials in green media from simple molecules is very attractive but remains a *** is an ideal precursor for the synthesis but previous report requires pyrolysis at high temperature(>700℃).Herein,starting with glucose,we develop a low temperature(210℃)synthesis of carbonaceous nanosheets in aqueous solution of *** the aid of ethylenediamine and Fe3+/Fe27Co27Ni2+ions,the nanosheets can grow on hematite nanorod array with very close ***,a metallic region is formed at the interface due to atom distribution distortion,which can promote the charge *** activity can be greatly enhanced by about 500%due to fast charge *** is much better than that prepared by physically or chemically mixing graphene and hematite(<200%).The enhancement is mainly due to the deformation area between the nanosheets and the *** effective hole diffusion length increases from 2 to 8 nm and lifetime of charge carrier also increases,as confirmed by ultrafast transient absorption *** method provides more opportunity for simple,mild and cost-effective fabrication of carbon-based two-dimensional by bottom-up method.

关键词： photocatalytic water oxidation hematite two-dimensional carbon bottom-up

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Identification of pollutant markers in rural mountainous areas of China by combining non-targeted analysis with zebrafish embryo toxicity tests

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Science of the Total environment 2025年 965卷 178625页

作者： Li, Jiaqi Zhou, Min Chen, Zhongli Guo, Jinsong Fang, Fang Schäffer, Andreas Shao, Ying Key Laboratory of the Three Gorges Reservoir Region's Eco-Environment Ministry of Education Chongqing University Chongqing400045 China Institute for Environmental Research RWTH Aachen University Aachen52074 Germany State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210093 China

Emerging pollutants (EPs) are increasingly found around the world, yet their composition and the risks pose to soil environments remain unclear, making a challenge to EP management, particularly in mountainous rural areas. In this study, we collected soils from three types of mountainous villages, each representing different levels of economic development: an industrial village, an ecotourism village, and an agricultural village. We analyzed these samples using non-target analysis and Danio rerio embryotoxicity test (ZET). A total of 216 compounds (level 2) were identified by matching with mzCloud database, with 149, 107, and 157 found in YY (industrial village), DX (ecotourism village) and LH (agricultural village), respectively. Interestingly, 78 compounds were present in all three villages, while the number of unique substances ranged from 7 to 47 in each village, serving as potential pollution markers. The most prevalent substances identified were aliphatics, heterocyclics, and aromatics. The ZET results showed that all soil extracts had significant acute toxic effects. Further analysis revealed a correlation between the toxic substances and the economic types of the villages. Specifically, linear chain dicarboxylic acids, drugs, and oxygenated polycyclic aromatic hydrocarbons (OPAHs) were the primary toxicants in the industrial village, whereas phthalate esters dominated in the other two villages. These findings provide valuable insights for effective monitoring of EPs in mountainous rural areas. © 2025 Elsevier B.V.

关键词： Methyl ester

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Regeneration and reuse of anode graphite from spent lithium-ion batteries with low greenhouse gas (GHG) emissions

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Chinese Chemical Letters 2023年第10期34卷 111-115页

作者： Junjie Liu Hui Shi Ke Yu Yanni Geng Xingyu Hu Genping Yi Jianzhi Zhang Xubiao Luo National-Local Joint Engineering Research Center of Heavy Metals Pollutants Control and Resource Utilization Nanchang Hangkong UniversityNanchang 330063China Key Laboratory of Jiangxi Province for Persistent Pollutants Control and Resources Recycle Nanchang Hangkong UniversityNanchang 330063China School of Environment and Energy Shenzhen Graduate SchoolPeking UniversityShenzhen 518055China State Key Lab of Urban Water Resource and Environment School of Civil and Environmental EngineeringHarbin Institute of Technology ShenzhenShenzhen 518055China

Regenerating spent graphite(SG)from retired lithium-ion batteries(LIBs)can effectively avoid resource ***,the technology is challenged by the impurity content and energy *** this study,micro-expanded graphite(MEG)was synthesized by one-step oxidation method using waste LIBs anode graphite as material and perchloric acid as intercalation and oxidant ***,its performance as a LIBs anode material were investigated as well as the greenhouse gas(GHG)emissions of the whole process were *** acid was successfully embedded in the SG during the reaction,which effectively removed the impurities in the *** introduced during intercalation and delamination,such as nanopores and intercrystalline *** provide additional space for Li ions during charging and discharging,thereby promoting capacity *** prepared MEG expresses a rate capability as high as 340.32 m Ah/g at a current density of 0.1 C and still retains 81.73%of the capacity after 100 cycles at a current density of 1 ***,the GHG emissions of the synthesis process of this article and other literatures are *** results demonstrated that perchloric acid treatment process provides a low-carbon,time-and energy-saving approach for regenerated SG as battery grade material.

关键词： Spent graphite Retired lithium-ion batteries Greenhouse gas emissions Regenerated Perchloric acid Micro-expanded graphite

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