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controlling outsourced emissions matters for decarbonizing China's urban wastewater sector at all life-cycle stages

Cell Reports Sustainability 2025年第4期2卷

作者： Zhang, Linmei Liu, Beibei Chen, Bin Chen, Shaoqing School of Economics and Management Zhejiang Sci-Tech University Hangzhou 310018 China Zhejiang Academy of Eco-Civilization Zhejiang Sci-Tech University Hangzhou 310018 China School of Environmental Science and Engineering Sun Yat-sen University Guangzhou 510275 China State Key Laboratory of Pollution Control & Resource Reuse School of Environment Nanjing University Nanjing 210023 China The Johns Hopkins University-Nanjing University Center for Chinese and American Studies Nanjing 210093 China State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Beijing Normal University Beijing 100875 China Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology (Sun Yat-sen University) Guangzhou 510275 China Institute of Carbon Neutrality and Green Development (Sun Yat-sen University) Guangzhou 510275 China

The climatic impact of the wastewater sector is significant given greenhouse gas (GHG) emissions through the whole supply chain. However, there has been a lack of investigation into trade-related leakage and the drivers of GHG emissions associated with wastewater treatment. Here, we develop a system-based modeling framework to track the outsourcing of emissions across regions, quantifying key socioeconomic drivers across the life-cycle stages of wastewater treatment in China, covering over 6,000 treatment plants nationwide. We find that outsourced emissions constitute over 41% of the total carbon footprint of China's wastewater sector. Over 90% of wastewater-related embodied GHG emissions traced back to production in northern, northwestern, and northeastern China. Variations in carbon intensity, production structure, and final demand structure can play an important role in emission reduction amid construction, treatment, and reuse stages. Our findings highlight the importance of coordinating supply-chain emission mitigation among regions for a deep decarbonization of the wastewater sector. © 2025 The Author(s)

关键词： carbon footprint Chinese regions outsourcing of emissions socioeconomic drivers urban wastewater sector

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Upcycling of Pb from Lead Smelting Residues to Lead Halide Perovskite for Piezocatalytic Hydrogen Production

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SSRN 2024年

作者： Mo, Xiaofeng Wang, Mengye Song, Han Li, Jie Wu, Zhen Lin, Zhang School of Environment and Energy Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling South China University of Technology Guangdong Guangzhou510006 China School of Materials Sun Yat-Sen University Shenzhen518063 China School of Metallurgy and Environment Central South University Changsha410083 China School of Environment and Resource Southwest University of Science and Technology Sichuan Mianyang621010 China

Organic lead halide perovskite is a promising piezocatalyst for piezocatalytic H2 production, meanwhile, large amount of unutilized lead resources in lead smelting residues have caused ecological security and resource waste problems. Here, we report an efficient Pb upcycling approach to recover lead halides from lead smelting residues to create lead halide perovskites (r-FAPbBr3-xIx), distinguished by the remarkable piezoelectric properties, for piezocatalytic H2 evolution. Zinc impurities, concurrently from these residues, found their utilization in the partial substitution of Pb2+ within the halide octahedra of r-FAPbBr3-xIx. The intervention of zinc enhancing desorption of hydrogen from r-FAPbBr3-xIx and culminating in a pronounced H2 yield as 157.80 μmol·g−1·h-1. Notably, the used r-FAPbBr3-xIx that lost its functional prowess could be regenerated and exhibited a piezocatalytic capacity similar to its initial state, perpetuating a sustainable cycle of utility. This pioneering route to Pb upcycling furnishes an alternative avenue for the preparation and utilization of lead-based perovskites. © 2024, The Authors. All rights reserved.

关键词： Hydrogen production

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Detrimental role of residual surface acid ions on ozone decomposition over Ce-modified γ-MnO2under humid conditions

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Journal of environmental Sciences 2020年第5期32卷 43-53页

作者： Xiaotong Li Jinzhu Ma Changbin Zhang Runduo Zhang Hong He State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Center for Excellence in Regional Atmospheric Environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China University of Chinese Academy of Sciences Beijing 100049China State Key Laboratory of Chemical Resource Engineering Beijing University of Chemical TechnologyBeijing 100029China

In the study,the catalyst precursors of Ce-modifiedγ-MnO2 were washed with deionized water until the pH value of the supernatant was 1,2,4 and 7,and the obtained catalysts were named *** space velocity of 300,000 hr-1,the ozone conversion over the pH=7 catalyst under dry conditions and relative humidity of 65%over a period of 6 hr was 100%and 96%,***,the ozone decomposition activity of the pH=2 and 4 catalysts distinctly decreased under relative humidity of 65%compared to that under dry *** physical and chemical characterization demonstrated that the residual sulfate ions on the pH=2 and 4 catalysts decreased their hydrophobicity and then restrained humid ozone decomposition *** pH=2 and 4 catalysts had inferior resistance to high space velocity under dry conditions,because the residual sulfate ion on their surface reduced their adsorption capacity for ozone molecules and increased their apparent activation energies,which was proved by temperature programmed desorption of O2 and kinetic ***-term activity testing,X-ray photoelectron spectroscopy and density functional theory calculations revealed that there were two kinds of oxygen vacancies on the manganese dioxide catalysts,one of which more easily adsorbed oxygen species and then became *** study revealed the detrimental effect of surface acid ions on the activity of catalysts under humid and dry atmospheres,and provided guidance for the development of highly efficient catalysts for ozone decomposition.

关键词： Ozone decomposition Manganese dioxide Surface acid ions Moisture-resistant property Oxygen vacancy

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Oxygen Vacancies Induce Boosted Photocarriers Dynamics in Wo3/Ti3c2 Micro-Nano Structures with Enriched 2d-2d Interfaces for Trimethylamine Abatement

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SSRN 2025年

作者： Duan, Zeyu Zhong, Ao Tang, Qijun Wang, Haiqiang Wu, Zhongbiao College of Environmental & Resources Science Zhejiang University Key Laboratory of Environment Remediation and Ecological Health Ministry of Education Hangzhou310058 China Zhejiang Tianlan Environmental Protection Technology Co. Ltd. Zhejiang Provincial Key Laboratory of Air Pollution Monitoring and Synergestic Control Hangzhou311202 China School of Science and Engineering The Chinese University of Hong Kong Guangdong Shenzhen518172 China

Purification of nitrogenous malodorous VOCs using photocatalytic technology is of great importance, but efficient catalysts for nitrogen-containing molecules still need to be developed. Here, we have successfully synthesized WO3/Ti3C2 microstructures with enriched 2D-2D interfaces and reported boosted photogenerated carrier dynamics induced by oxygen vacancies at the interfaces using trimethylamine as a model for nitrogen-containing pollutants. Experimental results and theoretical calculations revealed that the oxygen vacancy modification could significantly improve the adsorption of trimethylamine molecules due to the nucleophilic nature of the N atom. In addition, benefiting from the intimate 2D-2D bonding between Ti3C2 MXene and WO3 nanosheets, the electron transport at the interfaces was greatly reinforced, and over 90% elimination of 50 ppm trimethylamine could be achieved within 30 min under visible-light irradiation. This work opens new avenues to construct visible-light-responsive semiconductor materials for nitrogen-containing VOCs’removal. © 2025, The Authors. All rights reserved.

关键词： Nanosheets

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Boosting Generation of Reactive Oxygen and Chlorine Species on Tnt Photoanode and Ni/Graphite Fiber Cathode Towards Efficient Oxidation of Ammonia Wastewater

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SSRN 2022年

作者： Lu, Sen Li, Xuechuan Liao, Yunkai Zhang, Zhenghua Zhang, Guan State Key Laboratory of Urban Water Resource and Environment Shenzhen Key Laboratory of Organic Pollution Prevention and Control School of Civil and Environmental Engineering Harbin Institute of Technology Shenzhen Shenzhen518055 China Institute of Environmental Engineering & Nano-Technology Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen518055 China

Photoelectrocatalytic (PEC) process combining the merits of photocatalysis and electrocatalysis is considered as a promising ammonia oxidation technology for water treatment. However, some key issues, such as the limited in situ generation of oxidants on photoanode, slow mass transfer problem and generation of nitrate/nitrite by–products hinder the further application of PEC process in the treatment of ammonia pollutant. In this study, the graphite felt (GF) cathodes modified by different transition metals (Ni, Fe, Mn, Co, Cu) were screened by physicochemical and photoelectrochemical characterizations. The results show that the Ni–GF cathode with more Ni 0 uniformly distributed on the GF surface had the best electrocatalytic activity to generate H 2 O 2 . The PEC system composed of 10 wt% Ni–GF cathode and optimized titania nanotubes (TNTs) photoanode selectively converted about 96.13% ammonia to N 2 within 90 min. Compared with the single TNTs photoanode system, the ammonia oxidation reaction rate constant of the synergistic PEC oxidation system was increased by about two times, which demonstrated the role of the oxidants simultaneously generated on both anode and cathode. The in situ generated reactive oxygen-based oxidants and chlorine-based oxidants interacted together, and ClO• acted a leading role in the ammonia oxidation which were confirmed by quenching and probe experiments. In addition, the contributions of •OH and ClO• were significantly improved in the synergistic PEC oxidation system, compared with the single TNTs photoanode oxidation system. Furthermore, the nitrate by–products generated by the ammonia oxidation were further reduced on the Ni–GF cathode. The large amount of active chlorine and active oxygen generated on the electrode diffused into the bulk, effectively overcoming the mass transfer limitation of direct oxidation. Therefore, the developed TNTs photoanode/Ni-GF cathode system can continuously and efficiently convert ammonia to N 2 without

关键词： Mass transfer

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A risk-based stochastic energy-water-carbon nexus analytical model to support provincial multi-system synergistic management – A case study of Shanxi, China

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Science of the Total environment 2024年 957卷 177608页

作者： Zheng, Y.L. Huang, G.H. Li, Y.P. Han, D.C. Luo, B. Liu, Y.Y. Tang, W.C. State Key Joint Laboratory of Environmental Simulation and Pollution Control China-Canada Center for Energy Environment and Ecology Research UR-BNU School of Environment Beijing Normal University Beijing China Environmental Systems Engineering Program University of Regina ReginaSKS4S 0A2 Canada Institute for Energy Environment and Sustainable Communities University of Regina 3737 Wascana Parkway ReginaSKS4S 0A2 Canada

The synergistic management of energy-water‑carbon (EWC) nexus systems is crucial for achieving the sustainable development goals (SDGs). Therefore, a non-deterministic interval chance-constrained fractional optimization model for EWC nexus system (ICCF-EWC) management has been developed in this study. This model is capable of handling uncertain parameters represented as stochastic probability distributions and interval values, providing an effective approach to addressing dual-objective optimization problems. Meanwhile, this model is expected to investigate the effect of water scarcity/carbon abatement pressure on the overall system, and potential synergistic abatement effects. A case study of Shanxi Province shows that over the next 30 years, the cumulative installed capacity for clean and renewable energy will exceed 65 %. The dominance of coal-fired electricity will be considerably diminished, with wind power overtaking coal/gas-fired power by around 30 %. Moreover, water scarcity and carbon mitigation pressure would promote the development of electricity conversion mode to clean energy rather than the large-scale carbon capture and storage (CCS) technology upgradation of thermal power. The results can help support low-carbon transition of power systems at a province-level in China and financial incentives related policy making to advance water conservation and carbon emission mitigation. The developed model can also be adapted to other energy resource-dependent regional power systems. © 2024 Elsevier B.V.

关键词： Carbon capture and utilization

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Current progress on fluoride occurrence in the soil environment: Sources, transformation, regulations and remediation

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Chemosphere 2023年 341卷 139901页

作者： Wang, Minghan Wang, Haoyang Lei, Ge Yang, Biao Hu, Teng Ye, Yingying Li, Wei Zhou, Yaoyu Yang, Xiao Xu, Huaqin College of Environment and Ecology Hunan Agricultural University Changsha410128 China School of Biology and Chemistry Key Laboratory of Chemical Synthesis and Environmental Pollution Control-Remediation Technology of Guizhou Province Minzu Normal University of Xingyi Xingyi562400 China Key Laboratory of Land Surface Pattern and Simulation Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing100101 China

Fluorine is a halogen element widely distributed in nature, but due to excessive emissions from industrial manufacturing and agricultural production, etc., the soil is over-enriched with fluoride and the normal growth of plants is under stress, and it also poses a great threat to human health. In this review, we summarized the sources of fluoride in soil, and then analyzed the potential mechanisms of fluoride uptake in soil-plant systems. In addition, the main influences of soil ecosystems on plant fluoride uptake were discussed, soil management options to mitigate fluoride accumulation in plants were also summarized. The bioremediation techniques were found to be a developmental direction to improve fluoride pollution. Finally, we proposed other research directions, including fluoride uptake mechanisms in soil-plant systems at the molecular expression levels, development of visualization techniques for fluoride transport in plants, interactions mechanisms between soil microhabitats and plant metabolism affecting fluoride uptake, as well as combining abiotic additives, nanotechnology and biotechnology to remediate fluoride contamination problems. © 2023

关键词： Soils

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Impacts of Climate Change on Chinese Agriculture: Greenhouse Gas Emission and Increased Costs of Agricultural Production

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SSRN 2024年

作者： Su, Meng Xia, Lin-Lin Chen, Lei Zhang, Yan Key Laboratory for City Cluster Environmental Safety and Green Development the Ministry of Education School of Ecology Environment and Resources Guangdong University of Technology Guangzhou510006 China Guangzhou Institute of Energy Conversion Chinese Academy of Sciences No.2 Nengyuan Rd. Wushan Tianhe District Guangzhou510640 China State Key Joint Laboratory of Environmental Simulation and Pollution Control School of Environment Beijing Normal University Xinjiekouwai Street No. 19 Beijing China

Previous researches has focused on the impact of climate change on agricultural factors such as yield, production value and price, but overlook how climate change affect food production. Based on a climate change impact function, this study aims to determine the relationship between climate change and production costs and associated greenhouse gas (GHG) emissions. We found that China's agricultural GHG emissions increased significantly due to climate warming, of which 67.1% was induced by temperature while no effect exerted by precipitation. Additionally, temperature affects 73.4% of the average production cost per hectare of the three main crops. Under SSP1-2.6, SSP2-4.5, and SSP5-8.5 scenarios, assuming constant technological and price levels, the production costs in 2060 will be 4.2, 5.3, and 6.3 times the 2020 values, respectively. Correspondingly, Agricultural GHG emissions will be 17.6, 22.5, and 27.3 times the 2020 values, respectively. Therefore, global warming poses a major challenge to China's future food production, arguing for effective scientific and executive actions to address this issue. Our study provides new insights into the impact of climate change on grain production in China, which is a reference for the development of decarbonization policies. © 2024, The Authors. All rights reserved.

关键词： Costs

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Single-Cell-Resolution Analysis Revealing Hydrodynamics and Morphology Effect on Biofilm Detachment

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SSRN 2023年

作者： Wang, Shuai Zhu, Huiyan Zhang, Rui Wang, Xiaoxiang Institute for Carbon-Neutral Technology Shenzhen Polytechnic Shenzhen518055 China State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control School of the Environmental Science and Engineering Southern University of Science and Technology Shenzhen518055 China School of Water Conservancy and Environment University of Jinan Jinan250022 China

Understanding the process of biofilm detachment is crucial for effectively managing biofilm life cycle and mitigating its adverse consequences. In this work, we used fluorescence experiments, computational fluid dynamics (CFD) simulations, and machine learning approaches, specifically artificial neural network (ANN), to investigate the mechanisms involved in the detachment of S. oneidensis MR-1 biofilm. The results found that external shearing stress contributed by hydrodynamics and the initial morphology of the biofilm can both affect the detachment of the biofilm. In areas of high biofilm roughness, fluid flow can generate vortices or eddies, which create pressure gradients and accelerate detachment. Sensitivity analysis based on machine learning showed that biofilm roughness initially increased detachment rates, but the effect reached a plateau when roughness exceeded 0.6. Additionally, the model revealed a sigmoidal trend of detachment rates with increasing relative thickness and a monotonic increasing trend with higher pressure exposure on the biofilm surface. © 2023, The Authors. All rights reserved.

关键词： Neural networks

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The hidden risk of microplastic-associated pathogens in aquatic environments

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Eco-environment & Health 2023年第3期2卷 142-151页

作者： Huan Zhong Mengjie Wu Christian Sonne Su Shiung Lam Raymond W.M.Kwong Yuelu Jiang Xiaoli Zhao Xuemei Sun Xuxiang Zhang Chengjun Li Yuanyuan Li Guangbo Qu Feng Jiang Huahong Shi Rong Ji Hongqiang Ren School of Environment Nanjing UniversityState Key Laboratory of Pollution Control and Resource ReuseNanjing 210023China Department of Bioscience Arctic Research CentreAarhus UniversityRoskildeDenmark Higher Institution Centre of Excellence(HICoE) Institute of Tropical Aquaculture and Fisheries(AKUATROP)Universiti Malaysia Terengganu21030 Kuala NerusTerengganuMalaysia Department of Biology York University4700 Keele StreetTorontoON M3J 1P3Canada Tsinghua Shenzhen International Graduate School Shenzhen 518055China State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing 100012China Yellow Sea Fisheries Research Institute Chinese Academy of Fishery SciencesQingdao 266071China Institute of Environmental Research at Greater Bay Area Key Laboratory for Water Quality and Conservation of the Pearl River DeltaMinistry of EducationGuangzhou UniversityGuangzhou 510006China Key Laboratory of Environment and Health(HUST) Ministry of Education&Ministry of Environmental Protectionand State Key Laboratory of Environmental Health(Incubation)School of Public HealthTongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China State Key Laboratory of Environmental Chemistry and Ecotoxicology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China School of Environmental Science and Engineering Guangdong Provincial Key Lab of Environmental Pollution Control and Remediation TechnologySun Yat-sen UniversityGuangzhou 510275China State Key Laboratory of Estuarine and Coastal Research East China Normal UniversityShanghai 200241China University Centre for Research and Development Department of ChemistryChandigarh UniversityGharuanMohaliPunjabIndia

Increasing studies of plastisphere have raised public concern about microplastics(MPs)as vectors for pathogens,especially in aquatic ***,the extent to which pathogens affect human health through MPs remains unclear,as controversies persist regarding the distinct pathogen colonization on MPs as well as the transmission routes and infection probability of MP-associated pathogens from water to *** this review,we critically discuss whether and how pathogens approach humans via MPs,shedding light on the potential health risks *** on cutting-edge multidisciplinary research,we show that some MPs may facilitate the growth and long-range transmission of specific pathogens in aquatic environments,ultimately increasing the risk of infection in *** identify MP-and pathogen-rich settings,such as wastewater treatment plants,aquaculture farms,and swimming pools,as possible sites for human exposure to MP-associated *** review emphasizes the need for further research and targeted interventions to better understand and mitigate the potential health risks associated with MP-mediated pathogen transmission.

关键词： Microplastics Pathogens Colonization Transmission Public health

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