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Influences of Synoptic Circulations on Regional Transport, Accumulation And Chemical Transformation for Pm2.5 Heavy pollution Over Twain-Hu Basin, Central China

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SSRN 2023年

作者： Yao, Jingyan Bai, Yongqing Zhao, Tianliang Zhu, Yan Sun, Xiaoyun Tan, Chenghao Xiong, Jie Luo, Yuehan Hu, Weiyang Yang, Tong Key Laboratory for Aerosol-Cloud-Precipitation of China Meteorological Administration Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disaster Nanjing University of Information Science and Technology Nanjing210044 China Hubei Key Laboratory for Heavy Rain Monitoring and Warning Research Institute of Heavy Rain China Meteorological Administration Wuhan430205 China Hubei Meteorological Service Center Wuhan430205 China Anhui Province Key Laboratory of Atmospheric Science and Satellite Remote Sensing Anhui Institute of Meteorological Sciences Hefei230031 China State Key Laboratory of Organic Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou510640 China University of Chinese Academy of Sciences Beijing100049 China State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University 163 Xianlin Rd Jiangsu Nanjing210023 China

The Twain-Hu Basin (THB), located in Central China, serves as a key juncture where the northerly "polluted" airflows of the East Asian winter monsoon meet the southerly warm and humid airflows. Using the T-PCA objective synoptic pattern classification, FLEXPART-WRF, and Random Forest model, we investigate the influences of synoptic circulations on regional transport, local accumulation, and chemical transformation of PM2.5 during heavy air pollution over the THB in January of 2015-2022. The results show that the transport-type synoptic pattern accounts for 65.16% of heavy PM2.5 pollution, indicating that regional transport of PM2.5 dominates the THB’s heavy air pollution. The PM2.5/CO ratio is higher in the transport-type pattern and positively correlated with PM2.5 concentrations, reflecting a higher efficiency of chemical transformation to secondary PM2.5 in transport-type pollution compared with the accumulation-type pollution. Transport-type heavy PM2.5 pollution is predominantly influenced by upstream anomalous northerly and easterly airflows at the bottom of the high-pressure system, converging with the southern wind in the receptor area over the THB. Accumulation-type heavy pollution exhibits weak wind anomalies in central and eastern China under the control of a uniform pressure field. Furthermore, thermally-induced vertical circulations with sinking airflows in the middle and lower troposphere suppress the vertical air pollutant dispersions. The relative contributions of atmospheric factors for transport-type PM2.5 heavy pollution events are 38.0% for dynamical driver, 26.8% for thermal driver, and 35.1% for chemical transformation, while in accumulation-type, the contribution rates are 33.9%, 36.3%, and 29.7%, respectively. This study elucidates the influences of synoptic patterns on regional transport, local accumulation, and chemical transformation of PM2.5 for heavy air pollution, with implications for understanding changes of air quality in the recepto

关键词： Atmospheric movements

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A Green Sulfidated Micro Zero-Valent Iron Based-Hydrogel for the Sustainable Removal of Single and Multicomponent Heavy Metal in Groundwater

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SSRN 2024年

作者： Wang, Tingting Wang, Zhewen Shi, Junxiang Yin, Ying Du, Wenchao Wu, Jichun Guo, Hongyan State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China School of Environment Nanjing Normal University Nanjing210036 China School of Earth Sciences and Engineering Nanjing University Nanjing210023 China Quanzhou Institute for Environment Protection lndustry Nanjing University Quanzhou362000 China Joint International Research Centre for Critical Zone Science University of Leeds Nanjing University Nanjing University Nanjing210023 China Chinese Research Academy of Environmental Sciences China

Heavy metals contaminated groundwater was a big challenge to the safety of groundwater resources. Herein, the green sulfidated micro zero-valent iron-based hydrogel (SA-S-mZVI) was fabricated and applied to simultaneously remove cadmium, chromium, copper, and lead. The sulfur modification and the introduction of sodium alginate hydrogel facilitated the efficient and sustainable removal of single and multi-heavy metals. The co-existing heavy metal cations benefited the removal of Cr(VI). The removal mechanism was mainly adsorption and precipitation, and heavy metals were mostly present in the form of stable precipitates. The co-existence of organic substance and ions slightly affected the removal of heavy metals. Moreover, the long-term column experiments (240 days) showed that SA-S-mZVI achieved the high removal efficiency of >99.9% in the single, binary, and ternary systems, without significant impact on the groundwater environment. This study provided a new insight for contriving an eco-friendly and long-lasting zero-valent iron-based hydrogel material for the in-situ remediation of single and multicomponent heavy metal contaminated groundwater. © 2024, The Authors. All rights reserved.

关键词： Groundwater

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Historical Development of Al30 Highlighting the Unique Characteristics and Application in Water Treatment: A Review

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SSRN 2022年

作者： Liu, Libing Lu, Sen An, Guangyu Yang, Bo Zhao, Xu Wu, Deli He, Hongping Wang, Dongsheng College of Chemistry and Environmental Engineering Shenzhen University Guangdong Shenzhen518060 China State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology Guangdong Shenzhen518055 China State Key Laboratory of Environmental Aquatic Chemistry Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing100085 China State Key Laboratory of Pollution Control and Resources Reuse School of Environmental Science & Engineering Tongji University Shanghai200092 China College of Environmental and Resource Science Zhejiang University Zhejiang Hangzhou310058 China

With the largest molecule size, most surface charge and highest polymerization degree among Al species with known structure, Al30 ([(AlO4)2Al28(OH)56(H2O)26]18+) has been attached increasing importance to various fields, including water treatment. Based on the relevant literatures in the past decades, this review tries to comprehensively elaborate the historical development of Al30, ranging from its discovery and formation, structure and physicochemical property, to potential application. Different from Al13, there is semi-pore geometry structure in Al30 central beltway, and hence the uneven distribution of surface electrostatic potential, which was more positive in beltway than that at cap. Meanwhile, Al30 exposed different-type oxygen functional groups, and the bound H2O located near the beltway was most acidic, making it most easy to deprotonate. The deprotonation and aggregation of Al30 occurred in similarly successive pattern, but the formed Al30 aggregate maintained positive charge within a wider pH range than Al13 aggregate. Moreover, Al30 is advantageous in high structural stability, which makes it intact under acidic or high-temperature condition. These unique characteristics facilitate the coagulation performance of Al30 towards organic matter, arsenic and microorganism by enhanced adsorption, charge neutralization and complexation. Meanwhile, with Al30, the effective dosage range was broader than that with Al13, and the coagulation process was more resistant to pH variation, which was beneficial to overcome the water quality fluctuation in actual water treatment. Another application of Al30 is the usage as pillaring agent to improve the adsorption and catalysis performance of clay. Finally, this review identifies the challenge and direction in the future development of Al30, including the improvement of characterization and quantitative methods, and pilot-scale investigation in actual water treatment. © 2022, The Authors. All rights reserved.

关键词： Coagulation

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Dissolved black carbon in full-scale drinking water treatment plants: Occurrence and contribution to disinfection byproducts formation and cytotoxicity

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Journal of Hazardous Materials 2025年 494卷 138638页

作者： Chen, Haoran Li, Jianwei Chen, Chuze Zhao, Xiating Yao, Zongcheng Wang, Yuting Li, Zhigang Xian, Qiming State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China School of Environment Hangzhou Institute for Advanced Study University of Chinese Academy of Sciences Hangzhou310024 China

Dissolved black carbon (DBC) is a crucial precursor to disinfection byproducts (DBPs) in the drinking water disinfection process. However, the understanding of the presence and transformation of DBC within drinking water treatment plants (DWTPs) is still limited. This article systematically examined the presence and transport of DBC, in combination with the contribution to disinfection byproducts formation and cytotoxicity along the full-scale DWTPs. The results indicated that DBC concentrations varied from 70.0–199.4 μg/L in source water, 28.7–122.7 μg/L in sedimentation, 22.5–68.5 μg/L in carbon filter, 27.8–116.7 μg/L in sand filter and 7.2–23.0 μg/L in finished water. Sedimentation and disinfection processes resulted in higher DBC removal rates of 57 % and 71 % on average, respectively. DBC components with high aromaticity were predominantly removed during sedimentation, while DBC with low aromaticity was more likely to be removed during chlorination. DBC concentration had a significantly positive correlation with UV254 absorbance throughout the entire treatment process. Additionally, although DBC in the source water constituted only 1–10 % of the dissolved organic matter, DBC was estimated to contribute to 1–25 % of the DBP formation and 1–20 % of the cytotoxicity in the finished water. Hence, it is crucial to consider the possible risk of DBPs generated in the disinfection of DBC along the full-scale DWTPs. © 2025 Elsevier B.V.

关键词： Disinfection

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Ag-Organic Coordination Polymers with Multi-Dimensional Electron Transfer Channels for Enhancing Co2 Electroreduction

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SSRN 2022年

作者： Zou, Yingbing Pan, Tangxing Fan, Zhiwen Li, Yunbin Zhang, Hao Ju, Yan Zhang, Yongfan Ma, Xiuling Chen, Qianhuo Xiang, Shengchang Zhang, Zhangjing Fujian Key Laboratory of Pollution Control & Resource Reuse College of Environmental Science and Engineering Fujian Normal University Fuzhou350007 China Fujian Provincial Key Laboratory of Polymer Materials College of Chemistry and Materials Science Fujian Normal University Fuzhou350007 China Xiamen Lingyan Information Consulting Co. Ltd Xiamen361000 China State Key Laboratory of Photocatalysis on Energy and Environment College of Chemistry Fuzhou University Fuzhou350002 China

Although, electrons transfer plays an important role in achieving the electrocatalytic CO2 reduction reaction (CO2RR), it is scarce to regulate the electron transfer channels for enhancing the performance of CO2RR via rational design. Here, based on different solvothermal conditions, two metal-organic coordination polymers (MOCPs, Ag-MOCP-1 and Ag-MOCP-2) electrocatalyst for CO2RR were obtained by the same Ag ions and 5-phenyltetrazolium ligands. Single crystal X-ray diffraction showed Ag-MOCP-2 with intra-&inter-layer C–H···π and π···π interactions, while Ag-MOCP-1 with intra-layer π···π interactions. The intra-&inter-layer π interactions in Ag-MOCP-2 makes it show multi-dimensional electron transfer channels, which enable Ag-MOCP-2 with higher electron conductivities and lower band gap than Ag-MOCP-1. And the Faradaic efficiency of CO for Ag-MOCP-2 with 78.3% is higher than that for Ag-MOCP-1 with 69.1% at -1.08 V vs. RHE. Based on the same central metal and organic ligands of the two MOCPs, we believe that multidimensional electron transfer channels make a predominant contribution for improving CO2RR performance. © 2022, The Authors. All rights reserved.

关键词： Electrocatalysts

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Enhancement of Rapid Hydrolysis and Humification of Food Waste Slurry by Synergistically Incorporating Forward Uv365 and Persulfate

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SSRN 2022年

作者： Wang, Saier Wang, Hanbang Xiang, Huiming Shi, Ying Su, Lianghu Zhou, Tao Zhang, Longjiang Nanjing Institute of Environmental Sciences Ministry of Ecology and Environment 8 Jiangwangmiao Street Nanjing210042 China School of Environment and Resources Shanxi University 92 Wucheng Road Taiyuan030006 China The State Key Laboratory of Pollution Control and Resource Reuse School of Environmental Science and Engineering Tongji University Shanghai200092 China

In this work, UV365 irradiation was used to activate (sodium) persulfate (PS, 1–8%) for rapid hydrolyzation and humification of food waste (FW) slurry. Physicochemical characterizations showed that the hydrolysis yield reached a maximum value (745.06 g SCOD/kg TVSadded) following UV365/4% PS application for 120 hr. Fluorescence excitation–emission matrix spectroscopy combined with parallel factor analysis indicated that FW fluorescent molecules were decomposed into humus-like and tryptophan-like substances, and high PS dosages (4–8%) promoted formation of the former, confirmed by SEM, GPC, and FT-IR analyses. Our proposed mechanism involves nonselective attack by SO4·− on various FW components, leading to rapid ( © 2022, The Authors. All rights reserved.

关键词： Biodegradation

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The Distributional Effects of Environmental Taxation: A Multi-Regional Analysis

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SSRN 2022年

作者： Chen, Zhengjie Wang, Feng Zhang, Bing State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China Business School Nanjing University of Information Science & Technology Nanjing210044 China Development Institute of Jiangbei New Area Nanjing University of Information Science & Technology Nanjing210044 China Center for Environmental Management and Policy

Environmental taxation is regarded as an effective tool to improve air quality in China, but its distributional effects causing serious disparity among multi-groups and multi-regions are understudied. Here we construct a multi-regional dynamic recursive computable general equilibrium (CGE) model to explore the distributional effects of China’s environmental taxation among different income groups and regions, by specifying the elasticity parameters of urban households’ consumption in the model, and combining with various micro-data such as household survey data and environmental statistics database. We simulate the air pollution reductions of China’s environmental taxation, and the impacts on the income and expenditure of households with various environmental tax rates or manners of tax revenue recycling. Results have shown that China’s environmental taxation will widen the gap between different income groups and different regions. Also, such adverse distributional effects will be increased by higher environmental tax rates. However, recycling environmental tax revenues to both households and enterprises can reduce the losses of households’ income and consumption. Yet recycling revenues to enterprises is more effective in narrowing the gap between income groups and regions while improving regional economic development. Our findings may pave a way to design appropriate environmental tax rates and tax revenue recycling manners for China’s future environmental tax policies at the regional level. © 2022, The Authors. All rights reserved.

关键词： Recycling

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One-Pot Fabrication of Highly Permeable P84/Uio-66-Nh2-Pei Membrane for the Efficient Removal of Heavy Metals from Wastewater

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SSRN 2024年

作者： Liu, Yanyan Liu, Yanling Wang, Hongbing Chi, Mingshuo Guo, Yaoli Li, Yi Liu, Riri Wouters, Christine Chen, Yuhao Zheng, Junfeng Dai, Zhongde Van der Bruggen, Bart School of Carbon Neutrality Future Technology Sichuan University Chengdu610065 China Department of Chemical Engineering KU Leuven Celestijnenlaan 200F LeuvenB-3001 Belgium State Key Laboratory of Pollution Control and Resources Reuse Advanced Membrane Technology Center Tongji University Shanghai200092 China School of Material Science and Engineering Liaocheng University Shangdong Liaocheng252000 China Qingdao266580 China School of Chemical Engineering and Technology Sun Yat-sen University Zhuhai519082 China

Heavy metal pollution poses a threat to water bodies and public health, necessitating the exploration of advanced technologies to effectively remove heavy metals from wastewater. In this study, a one-pot approach was employed to fabricate a positively charged membrane using P84 as the substrate, and UiO-66-NH2 nanoparticles and PEI as crosslinkers. Introducing UiO-66-NH2 with inherent porous structures can create nanopores and gaps within the PA layer, providing extra pathways for water molecules to permeate through the membrane. Moreover, the UiO-66-NH2 nanoparticles imparted hydrophilicity and a positive charge to the resulting membrane. Compared to the blank membrane without UiO-66-NH2 nanoparticles, the optimal membrane demonstrated a significant increase of 44% in water flux (52.4 L m-2 h-1) while maintaining a remarkable removal performance for CuCl2 (99.5%), PbCl2 (99.4%), Ni(NO3)2 (98.6%), and ZnCl2 (98.4%) at 4 bar. Furthermore, the UiO-66-NH2 nanoparticles can cross-link with the P84 polymer, ensuring a stable attachment between the polyamide (PA) layer and the P84 substrate by covalent bonds, preventing the potential conventional nanoparticle leakage. Additionally, three different fabrication methods were employed to explore the optimal approach for incorporating UiO-66-NH2 nanoparticles, with each method resulting in a distinct distribution of nanoparticles within the membrane. This study highlights the potential of the resultant membranes in addressing the challenges of wastewater treatment, offering a facile and promising avenue for heavy metal removal. © 2024, The Authors. All rights reserved.

关键词： Membranes

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Efficient Co2 Photoreduction Triggered by Oxygen Vacancies in Ultrafine Bi5o7br Nanowires

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SSRN 2022年

作者： Mao, Danjun Yang, Shuxue Hu, Yuan He, Huan Yang, Shaogui Zheng, Shourong Sun, Cheng Jiang, Zhifeng Qu, Xiaolei Wong, Po Keung State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China School of Environment Nanjing Normal University Nanjing210023 China School of Life Sciences The Chinese University of Hong Kong NT Shatin999077 China Institute for Energy Research Jiangsu University Zhenjiang212013 China Institute of Environmental Health and Pollution Control School of Environmental Science & Engineering Guangdong University of Technology Guangzhou510006 China

Sluggish charge kinetics, poor photoabsorption and low CO2 affinity have been regarded as the main obstacles inhibiting the efficiency of CO2 photoreduction. Herein, freestanding ultrafine Bi5O7Br nanowires with abundant oxygen vacancies were initially fabricated to synchronously optimize these critical processes. The 1D ultrafine configuration and abundant oxygen vacancies endow the Bi5O7Br nanowires with extended photoadsorption, boosted charge separation and enhanced interfacial CO2 adsorption and activation. Density functional calculations reveal that the presence of oxygen vacancies on the Bi5O7Br surface can not only afford abundant localized electrons and lower the CO2 reaction energy barriers, but also have a stronger covalent interaction and more efficient electron exchange and transfer between CO2 and oxygen vacancies. Without any co-catalyst or sacrifice reagent, OV-rich Bi5O7Br nanowires show a 27.76-fold enhancement of CO2 photoreduction activity relative to bulk Bi5O7Br in the gas-solid system. This work may inspire the future design of ultrafine catalysts for artiﬁcial photosynthesis. © 2022, The Authors. All rights reserved.

关键词： Bromine compounds

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Accumulation and Speciation of Arsenic in Pteris vittata Gametophytes and Sporophytes: Effects of Calcium and Phosphorus

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Pedosphere 2019年第4期29卷 540-544页

作者： YANG Guangmei WANG Yuanguo ZHU Lingjia HAN Yonghe Peter CHRISTIE Jiangsu Vocational College of Agriculture and Forestry State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing University Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil ScienceChinese Academy of Sciences Tongren Polytechnic College

Dear Editor, Environmental arsenic (As) contamination of both soil and water systems is a worldwide problem, and As can enter the human food chain through contaminated agricultural products and drinking water and cont... 详细信息

关键词： Accumulation Speciation Pteris vittata Gametophytes

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