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Mitigating China's Prefecture-Level Economic Risk of Water Scarcity: The Role of Water Conservation and Carbon Neutrality Policies

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SSRN 2024年

作者： Jiang, Feng Wang, Saige Chen, Bin Wang, Hao Duan, Cuncun State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Beijing Normal University Beijing100875 China Faculty of Geographical Science Beijing Normal University Beijing100875 China Faculty of Architecture Civil and Transportation Engineering Beijing University of Technology Beijing100124 China College of Water Sciences Beijing Normal University Beijing100875 China

Inadequate water quantity and substandard water quality exacerbates China’s water scarcity, posing significant economic risks. However, the impact of policies on water scarcity risks (WSR) remains unexplored. This study integrated WSR assessment with policy scenarios related to water conservation and carbon neutrality. Firstly, we developed a 2017 inventory of quantity-based and quality-based water consumption for China's 304 prefectures. Then, using multi-regional input-output analysis, we assessed local WSR and transboundary flows across prefectures. Thirdly, we formulated four scenarios for China's water conservation and carbon neutrality policies in 2030 and 2060, exploring their potential effects on WSR mitigation. The results showed that China's total quantity-based and quality-based WSR accounted for 8.0% of GDP in 2017. By 2060, 89% of prefectures' WSR would be alleviated due to water-saving measures and low-carbon transition, though 11% of prefectures might experience offsetting effects. These findings offer valuable insights for water resources management in addressing economic risks. © 2024, The Authors. All rights reserved.

关键词： Water conservation

Coupling Ga(OH)3 and chromate as a universal cocatalyst for CO2 photoreduction by H2O

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Catalysis Today 2025年 458卷

作者： Xu, Xuanwen Lu, Yuehao Wang, Shuying Fan, Lele Dong, Pengyu Wang, Zheng Jiang, Ruiyu Key Laboratory for Advanced Technology in Environmental Protection of Jiangsu Province Yancheng Institute of Technology Yancheng224051 China School of Chemistry and Chemical Engineering Yancheng Institute of Technology Yancheng224051 China School of Mechanics and Safety Engineering Zhengzhou University 100 Kexue Road Henan Zhengzhou450001 China State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing100085 China

Development of effective and universal cocatalysts are very important to the photocatalytic conversion of CO2 by H2O. Herein, CO evolution from this reaction was successfully promoted by co-catalytic coupling featuring Ga(OH)3 loading onto photocatalyst surfaces and in situ addition of Na2CrO4. This strategy exhibited excellent universality for a series of Ta- and Ga-based photocatalysts. Modifications of Ga(OH)3 created active sites for CO production on the photocatalyst surfaces. The in situ addition of Na2CrO4 improved CO evolution activity when two factors were satisfied: (1) active sites for CO evolution were created using the proper cocatalysts and (2) the photocatalyst surfaces were sufficiently quenched by hydroxide ions. © 2025 Elsevier B.V.

关键词： Photocatalytic activity

A Vision of Automotive Urban Minerals Formation and Re-Supply in China and Japan

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SSRN 2023年

作者： Xu, Guochang Liu, Fei Miao, Youping Wang, Binze Zhang, Zhengyang Li, Jinhui Matsubae, Kazuyo Zeng, Xianlai State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China Graduate School of Environmental Studies Tohoku University Aoba 468-1 Aramaki Aobaku Sendai980-8574 Japan Material Cycles Division National Institute for Environmental Studies Onogawa 16-2 Tsukuba305-8506 Japan

Urban mining of end-of-life vehicles plays a vital role in supplementing the mineral requirements. Through an urban metabolism analysis, we evaluated formations of 33 automotive urban minerals and their re-supply potentials for new vehicle production in China and Japan. Results show that the total mass of automotive urban minerals will increase to 47 Mt in China and 4.8 Mt in Japan in 2050, respectively. Under the current state of recycling, circularities of 13 target metals for vehicles rise, ranging from 5.4−26% in 2020 to 17−70% in 2050 in China, whereas Japan's range shrinks from 13−111% in 2020 to 29−72% in 2050. For re-supply potentials of 33 metals stocks in 2030, the lowest supply potentials found are Li, Co, Ni, Pt Dy, Nd, and Cu in China and Japan, which can meet 2−3 years and 6−7 years of demands for new vehicle in both countries even with 100% overall material recycling. © 2023, The Authors. All rights reserved.

关键词： Minerals

Insight in the Mechanism of Alkaline Treatment Methods Effecting Dewatered Sludge Fermentation from Microbial Characteristics

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SSRN 2022年

作者： Xing, Yixiao Xiao, Huang Wang, Hongjie Yu, Jianghua Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control School of Environmental Science and Engineering Nanjing University of Information Science & Technology Nanjing210044 China Shenzhen518055 China

This work explored the effecting mechanisms of alkali treatment methods (alkali pretreatment and alkali process treatment) on volatile fatty acids (VFAs) yield in anaerobic fermentation (AF) of dewatered sludge (DS). Alkali process treatment improved VFAs accumulation and the maximum VFAs yield was 3.55 times higher than alkali pretreatment. Acetic acid comprised 40% of VFAs in the alkali process treatment system, compared to less than 19% in the alkali pretreatment group. The DS was most considerably dissolved during the alkali process treatment, soluble chemical oxygen demand (sCOD), soluble protein and carbohydrate concentration were 3100.72, 1256.46, and 308.78 mg/L, respectively. Microbial community analysis indicated that the alkaline process treatment reduced the microbial diversity, and the dominant phyla were single and prominent (Firmicutes and Actinobacteria). Burkholderiaceae , Rikenellaceae , Corynebacteriaceae , and Microthrixaceae were promoted at the genus level. Additionally, carbohydrate metabolism was the highest, but lipid metabolism was the lowest by alkali process treatment. As a whole, alkali process treatments increased carbohydrate and amino acid metabolism and reduced lipid metabolism. This study offers an effectual microbial strategy for improving acid production from AF of DS. © 2022, The Authors. All rights reserved.

关键词： Anaerobic digestion

A Newly Developed Lagrangian Chemical Transport Scheme: Part 1. simulation of a Boreal Forest Fire Plume

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SSRN 2023年

作者： Liu, Yayong Huang, Yufei Liggio, John Hayden, Katherine Mihele, Cris Wentzell, Jeremy Wheeler, Michael Leithead, Amy Moussa, Samar Xie, Conghui Yang, Yanrong Zhang, Yuheng Han, Tianran Li, Shao-Meng State Key Joint Laboratory of Environmental Simulation and Pollution Control College of Environmental Sciences and Engineering Peking University Beijing100871 China Air Quality Research Division Science and Technology Branch Environment and Climate Change Canada TorontoONM3H 5T4 Canada

Forest fire research over the last several decades has improved the understanding of their emissions and impacts. Nevertheless, the evolution of forest fire plumes remains poorly quantified and understood. Here, a Lagrangian chemical transport model, the Forward Atmospheric Stochastic Transport model coupled with the Master Chemical Mechanism (FAST-MCM), has been developed to simulate the transport and chemical transformations of boreal forest fire plumes emitted over several hours. The model results for NOx, O3, HONO, HNO3, pNO3 and 70 VOC species are compared with airborne in-situ measurements within plume centers and their surrounding portions during the transport. Comparisons between simulation results and measurements show that the FAST-MCM modeling technique can predict the physical and chemical evolution of forest fire plumes very well in general. The results indicate that the model can be an important tool used to aid the understanding of the downwind impacts of forest fire plumes. © 2023, The Authors. All rights reserved.

关键词： Fires

Revealing the Theoretical Wind Potential of the Qinghai-Tibet Plateau: A Novel Bayesian Monte-Carlo Framework for the Weibull Bivariate Distribution

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SSRN 2024年

作者： Wang, Liting Liu, Renzhi Zeng, Weihua Zhang, Lixiao Peng, Huaiwu Calautit, John Kaiser Ma, Bingran Zhang, Ruijia Ma, Xiyao Li, Xiaohan State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Beijing Normal University Beijing100875 China Key Laboratory of Adaptation and Evolution of Plateau Biota Northwest Institute of Plateau Biology Chinese Academy of Sciences Qinghai Xining810001 China Northwest Engineering Corporation Limited POWERCHINA Shaanxi Xi’an710065 China Department of Mechanical Engineering Institute of Ecology Chinese Research Academy of Environmental Sciences Beijing100012 China

Understanding the regional theoretical wind potential (TWP) is crucial for wind power planning and construction. However, previous studies on the TWP encounter several issues: variable quality of wind speed data, lack of quantification of uncertainties in wind speed distribution parameters, and unscientific and inconsistent methods used in the TWP calculation. To address these issues, this study has introduced a framework called the Hierarchical Bayesian-Monte Carlo (HBMC), which processed multi-year and multi-source wind speed data in a probabilistic and hierarchical manner. It could quantify the uncertainties of wind speed distributions and their parameters, better integrating historical experience and addressing prediction errors. Additionally, the changes in wind speeds and air densities with height across the blade sweep and the maximum possible power coefficient were considered in the estimation of TWP, thus modifying the traditional method of TWP evaluation. The wind speed distributions in the Qinghai-Tibetan Plateau (QTP) followed Weibull functions, with the prior distributions of their parameters k and λ being gamma functions. Sampling the posterior distributions of k and λ using the Metropolis-Hastings algorithm revealed that the within-chain errors for k and λ were less than 0.193 and 0.0244 m/s, respectively. The variances between chains were uniform, and all sampling chains converged. The results of the K-S test indicated that the discrepancy between the predicted and actual wind speeds was less than 0.089 m/s. Furthermore, the HBMC model identified significantly more areas with high TWP than traditional methods, suggesting that it can more effectively pinpoint optimal locations for wind power development. In the QTP, 19.31% of the area had a maximum level TWP, 21.43% a high level, and 19.78% a moderate level. Therefore, this study has established a flexible and adaptable methodological framework that enhances the theoretical system and could support re

关键词： Wind speed

Optimization and Mechanism of Tetrabromobisphenol a Removal by Dithionite Under Anaerobic Conditions: Response Surface Methodology and Degradation Pathway

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SSRN 2022年

作者： Wang, Zhuoyue Song, Wei Li, Ji Zhang, Xiaolei Wang, Hongjie School of Civil and Environmental Engineering Harbin Institute of Technology Shenzhen518055 China School of Civil and Transportation Engineering Guangdong University of Technology Guangzhou510006 China Shenzhen Key Laboratory of Water Resource Utilization and Environmental Pollution Control Shenzhen518055 China State Key Laboratory of Urban Water Resource and Environment School of Environment Harbin Institute of Technology Harbin150090 China

In this study, dithionite (DTN) was used to degrade Tetrabromobisphenol A (TBBPA), a widely applied brominated flame retardants, under anaerobic conditions with the reaction terminator of nitrite. The optimization of reaction parameters including TBBPA concentration, DTN concentration and pH value were conducted by response surface methodology (RSM) based on central composite design (CCD). The degradation process could be simulated accurately by a quadratic model with the correlation coefficient R 2 of 0.9550. The interaction between pH and DTN concentration was significant with the p-value of 0.0017. Moreover, the maximum TBBPA removal was 87.6% and obtained at TBBPA concentration of 2.00 μM, the DTN concentration of 322.31 μM, and the pH of 6.14 under anaerobic conditions. It was found that the factors influenced TBBPA removal followed the order: pH > DTN concentration > TBBPA concentration. The major active products from DTN are SO 3 2 − and S 2 O 3 2− . In addition, different inhibitions of natural water matrix including chloride, bicarbonate, sulfide and humic acid on TBBPA degradation had been confirmed. According to the identified six intermediates via gas chromatography-mass spectrometry (GC-MS), two steps of the degradation pathways were speculated, including the breakage of C-Br bond and C-C bond. This study providesa convenient way to degrade TBBPA. © 2022, The Authors. All rights reserved.

关键词： Gas chromatography

Quantifying the impacts of COVID-19 on Sustainable Development Goals using machine learning models

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Fundamental Research 2024年第4期4卷 890-897页

作者： Chenyang Shuai Bu Zhao Xi Chen Jianguo Liu Chunmiao Zheng Shen Qu Jian-Ping Zou Ming Xu School of Management Science and Real Estate Chongqing UniversityChongqing 400044China bSchool for Environment and Sustainability University of MichiganAnn ArborMI 489United Stats Michigan Institute for Computational Discovery&Engineering University of MichiganAnn ArborMI 48109United States College of Economics and Management Southwest UniversityChongqing 400044China Center for Systems Integration and Sustainability Department of Fisheries and WildlifeMichigan State UniversityEast LansingMI 48824United States Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control School of Environmental Science and EngineeringSouthern University of Science and TechnologyShenzhen 518055China School of Management and Economics Beijing Institute of TechnologyBeijing 100081China Center for Energy&Environmental Policy Research Beijing Institute of TechnologyBejing 100081China Key Laboratory of Jiangxi Province for Persistent Plutants Control and Resources Recycle Nanchang Hangkong UniversityNanchang 330063China Department of Civil and Environmental Engineering University of MichiganAnn ArborMI 48109United States

The COvID-19 pandemic has posed severe threats to global sustainable ***,a comprehensive quantitative assessment of the impacts of COVID-19 on Sustainable Development Goals(SDGs)is still *** research quantified the post-COVID-19 SDG progress from 2020 to 2024 using projected GDP growth and population and machine learning models including support vector machine,random forest,and extreme gradient *** results show that the overall SDG performance declined by 7.7%in 2020 at the global scale,with 12 socioeconomic SDG performance decreasing by 3.0%-22.3%and 4 environmental SDG performance increasing by 1.6%-9.2%.By 2024,the progress of 12 SDGs will lag behind for one to eight years compared to their pre-COVID-19 trajectories,while extra time will be gained for 4 environment-related ***,the pandemic will cause more impacts on countries in emerging markets and developing economies than those on advanced economies,and the latter will recover more quickly to be closer to their pre-covID-19 trajectories by ***-COVID-19 economic recovery should emphasize in areas that can help decouple economic growth from negative environmental *** results can help government and non-state stakeholders identify critical areas for targeted policy to resume and speed up the progress to achieve SDGs by 2030.

关键词： Sustainable development goals COVID-19 Machine learning Global development Sustainable development assessment

Degradation of 2,4,6-trichlorphenol by producing hydrogen using ultrasonic mist generated from photocatalysts suspension

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Emerging Contaminants 2020年第1期6卷 155-161页

作者： Huihui Li Xin Chang Yuanzheng Zhang Siyao Zhang Yunrong Dai Lifeng Yin State Key Laboratory of Environment Simulation and Pollution Control School of EnvironmentBeijing Normal UniversityBeijing100875PR China School of Water Resources and Environment School of Scientific ResearchChina University of GeosciencesBeijing100083PR China

Photocatalytic hydrogen production synergized with the oxidation of pollutants is an environmentally friendly and economical approach to generate clean energy and remove the pollution from *** this study,photocatalytic hydrogen production cooperating with 2,4,6-trichlorophenol(2,4,6-TCP)degradation have been reinforced by introducing an ultrasonic *** degradation of 2,4,6-TCP in a mist of three photocatalysts(g-C3N4,TiO2,and Bi2O3)generated by ultrasonic atomization was performed under 254 nm ultraviolet(UV254)light *** results showed that,under UV254 irradiation,three different photocatalysts(g-C3N4,TiO2,and Bi2O3)all accelerated both hydrogen production and 2,4,6-TCP ***,2,4,6-TCP degradation and photocatalytic hydrogen production exhibited an obvious synergistic effect,since 2,4,6-TCP has a strong tendency to react with photo-generated holes and their second radicals so as to inhibit the recombination of carriers,and thus improved the efficiency of hydrogen production ***,by introducing ultrasonic atomization,the atomized droplets acted as micro-photocatalytic units to replace the macrophotocatalytic reaction ***,the mass transfer distance for free radicals was restricted and the utilization of light energy by photocatalysts was ***,the reaction efficiency was *** results reveal environmentally friendly and economical potential of hydrogen production by photocatalytic degradation of 2,4,6-TCP in atomized droplets.

关键词： Ultrasonic atomization Photocatalysis Hydrogen production 2,4,6-Trichlorophenol Degradation