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SSRN 2023年

作者： Zeng, Yong Zhao, Yanwei Yang, Wei State Key Laboratory of Heavy Oil Processing Beijing Key Laboratory of Oil & Gas Pollution Control College of Chemical Engineering and Environment China University of Petroleum Beijing102249 China State Key Laboratory of Water Environment Simulation School of Environment Beijing Normal University Beijing100875 China

Ecological responses and thresholds at the community level are current research hotspots. Here, we propose a threshold determination method based on an ecological model of Baiyangdian (BYD) Lake in northern China. We used the Shannon–Wiener index, the ratio of total production to total respiration (P/R), and eco-exergy as community-level response indicators. The scatter points between the concentration gradient of PAHs and the community-level response indicators were obtained by running the BYD Lake model. Nonlinear regression was used to adapt these scatter points. During this process, response patterns were identified and the threshold result was determined. Although some species-response patterns were inconsistent, the community-level response patterns basically conformed to a Weibull cumulative distribution function. The threshold was not fixed, but rather case-oriented. The sensitivity and persistence of the community response curves determined the positions and ranges of threshold intervals. The sensitivity ranking of response indicators is P/R = eco-exergy > Shannon–Wiener index, and the persistence ranking of response indicators is Shannon–Wiener index > P/R = eco-exergy. Response indicators must be carefully selected because the results of different response indicators differ significantly. The method proposed in this paper provides reference for similar ecological response models and ecological threshold research. © 2023, The Authors. All rights reserved.

关键词： Polycyclic aromatic hydrocarbons

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Decoupled fungal and bacterial functional responses to biochar amendment drive rhizosphere priming effect on soil organic carbon mineralization

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Biochar 2024年第1期6卷 1489-1512页

作者： Chao He Jean Damascene Harindintwali Hao Cui Weiwei Zheng Qingyang Zhu Scott XChang Fang Wang Jingping Yang Institute of Environment Pollution Control and Treatment College of Environmental and Resource SciencesZhejiang University866 Yuhangtang RoadHangzhou 310058ZhejiangChina. State Key Laboratory of Soil and Sustainable Agriculture Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China. University of Chinese Academy of Sciences Beijing 100049China. State Key Laboratory of Plant Environmental Resilience Zhejiang UniversityHangzhou 310058China. Department of Renewable Resources University of AlbertaEdmontonAB T6G 2P5Canada.

The application of biochar to soil is widely recognized as a promising strategy for enhancing the accumulation and stability of soil organic carbon(SOC),which is crucial in mitigating climate ***,the influence of interactions between plants and biochar on soil microbial communities and their involvement in SOC mineralization and stability remains *** understanding is essential for optimizing carbon(C)sequestration in systems involving plants,soil,and *** this study,employing a 13C natural abundance approach,we investigated the effect of biochar on the maize rhizosphere priming effect(RPE)in paddy *** also examined alterations in microbial communities and functional genes related to C degradation and *** the 99 days of maize growth,biochar application increased RPE and total SOC while decreasing dissolved organic *** also elevated soil pH,resulting in shifts in fungal and bacterial community structure,favoring oligotrophic *** and bacterial assemblies were dominated by deterministic and stochastic processes,*** the abundance of fungal guilds varied irregularly,bacterial guilds were uniformly enriched under biochar-plant *** traits such as ecoenzymatic activities,bacterial guilds,and functional genes predominantly affected RPE under biochar *** functional genes associated with C degradation and fixation were concurrently enhanced with biochar *** results indicate that interactions between plants and biochar can enhance native SOC mineralization and accumulation in a short timeframe by modulating functional traits of soil microorganisms,particularly the bacterial community involved in C degradation and fixation.

关键词： Ecoenzymatic activities Functional genes Functional traits Microbial co-occurrence network Microbial guilds Taxonomic traits

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Ship emission variations during the COVID-19 from global and continental perspectives

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Science of the Total environment 2024年 954卷 176633页

作者： Yi, Wen He, Tingkun Wang, Xiaotong Soo, Yu Han Luo, Zhenyu Xie, Yongshun Peng, Xin Zhang, Weiwei Wang, Yongyue Lv, Zhaofeng He, Kebin Liu, Huan State Key Joint Laboratory of ESPC School of Environment Tsinghua University Beijing100084 China Key Laboratory of Beijing on Regional Air Pollution Control Beijing University of Technology Beijing100124 China

The COVID-19 pandemic and the International Maritime Organization's (IMO) 2020 fuel-switching policy have profoundly impacted global maritime activities, leading to unprecedented changes in shipping emissions. This study aimed to examine the effects from different scales and investigate the underlying drivers. The big data model Ship Emission Inventory Model (SEIM) was updated and applied to analyze the spatiotemporal pattern of global ship emissions as well as the main contributors in 2019 and 2020. Overall, ships emitted NOx, CO, HC, CO2, and N2O declined by 7.4 %–13.8 %, while SO2, PM2.5, and BC declined by 40.9 %–81.9 % in 2020 compared with 2019. The decline in CO2 emissions indicated a comparable reduction across vessel tonnages. Ship emissions occurring at cruising status accounted for over 90 % of the ship's CO2 emission reduction. Container ships, chemical tankers, and Ro-Ro vessels were the primary contributors to the emission reductions, with container ships alone responsible for 39.4 % of the CO2 decrease. The ship's CO2 emissions variations revealed the decline-rebound patterns in response to the pandemic. Asian-related routes saw emissions drop in February 2020, followed by a rebound in May, while European and American routes experienced declines starting in May, with a recovery in August. Further analysis of CO2 emission in Exclusive Economic Zones (EEZs) showed high temporal consistency between vessel CO2 emissions, sailing speeds, and international trade volumes across continents, and exhibited heterogeneity in main contributing ship type of emission reduction on continental scale. Our study reveals the short-term fluctuation characteristics of global ship emissions during the pandemic, particularly focusing on their spatiotemporal evolution and the inherent disparities. The results highlight the correlation between global ship emissions and trade, as well as the operational status of ships, and their rigidity. © 2024 Elsevier B.V.

关键词： Low emission

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Climate Downscaling Using Neural Operator: Spatiotemporal Multimodal Fusion Operator with state-Query Coupled Kernel

Climate Downscaling Using Neural Operator: Spatiotemporal Mu...

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2025 IEEE International Conference on Acoustics, Speech, and Signal Processing, ICASSP 2025

作者： Zhang, Haodi Wang, Yichi Jian, Yifan Jiang, Jiahui Bai, Zhaohai Ma, Lin College of Computer Science and Software Engineering Shenzhen University China Center for Agricultural Resources Research Institute of Genetic and Developmental Biology Chinese Academy of Sciences China State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University China

ISBN: (纸本)9798350368741

Climate downscaling is crucial for detailed small-scale analysis and for acquiring climate data in regions without weather stations. Operator learning has proven potential for this task. However, several challenges remain in operator learning, such as multimodal fusion, spatiotemporal fusion and input state and query adaptation. To address these challenges, we propose a Spatiotemporal Multimodal Fusion Operator with a state-Query Coupled Kernel (SMCK). This framework includes a latent space fusion encoder that encodes climate variables using position-wise multihead attention for multimodal fusion and integrates historical information to generate robust and precise representation. Additionally, we introduce a state-query coupled kernel that combines radial basis functions and discrete fourier encoding to enhance query location representation, while also adapting to the state to obtain the coupled kernel. Extensive experiments demonstrate that our method achieves state-ofthe-art performance and provides strong support for climate downscaling and the planning of climate-related strategies. © 2025 IEEE.

关键词： Climate downscaling Deep Learning Multimodal fusion Operator learning Time series forecasting

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Homogeneous selection is not always important in bacterial community in the eutrophic enclosed bay

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Ecological Processes 2022年第1期11卷 363-373页

作者： Junwei Zhu Yifan Ma Lingfeng Huang Wenjing Zhang State Key Laboratory of Marine Environmental Science Marine Biodiversity and Global Change Research CenterCollege of Ocean and Earth SciencesXiamen UniversityXiamenChina Xiamen Key Laboratory of Urban Sea Ecological Conservation and Restoration Xiamen UniversityXiamenChina Fujian Key Laboratory of Coastal Pollution Prevention and Control Xiamen UniversityXiamenChina Key Laboratory of the Ministry of Education for Coastal and Wetland Ecosystems College of the Environment and EcologyXiamen UniversityXiamenChina

Background:Previous studies have found that coastal eutrophication increases the influence of homogeneous selection on bacterial community ***,whether seasonal changes affect the dominance of homogenous selection in bacterial community assembly in eutrophic bays remains *** Bay is an enclosed bay with ongoing eutrophication,located in the southeast coast of *** investigated the bacterial community composition at two depths of the enclosed bay across seasons and the seasonal variation in community assembly ***:Diversity analyses revealed that the bacterial community composition among seasons differed *** contrast,there was little difference in the community composition between the two *** temperature was the key environmental factor influencing the community *** null model indicated that the relative importance of homogeneous selection decreased in the following order:spring>winter>autumn>*** selection did not always dominate the community assembly among seasons in the eutrophic *** effects of pure spatial variables on the community assembly were prominent in autumn and ***:Our results showed the seasonal influence of eutrophication on bacterial community *** seasonal variation in composition and structure of bacterial communities eclipsed the vertical *** could enhance the importance of homogeneous selection in the assembly processes,but the seasonal environmental differences interfered with the steady-state maintained by ongoing eutrophication and changed the community assembly *** selection was not always important in bacterial community in the eutrophic enclosed *** bacterial community was the most complex in summer,because the composition differed from other seasons,and the assembly process was the most *** findings have contributed to understanding bacterial community composition and asse

关键词： Homogeneous selection Subtropical enclosed bay Assembly processes Bacteria community

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How do inundation provoke the release of phosphorus in soil-originated sediment due to nitrogen reduction after reclaiming lake from polder

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Journal of environmental Sciences 2022年第8期34卷 147-157页

作者： Hezhong Yuan Bingchan Jia JuanWu Haixiang Wang Jianghua Yu Yiwei Cai Enfeng Liu Qiang Li Qingfei Zeng Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control and Collaborative Innovation Center of Atmospheric Environment and Equipment Technology(CICAEET) School of Environmental Science and EngineeringNanjing University of Information Science and TechnologyNanjing 210044China State Key Laboratory of Lake Science and Environment Nanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing 210008China Gaochun District Water Authority Bureau Nanjing 211300China College of Geography and Environment Shandong Normal UniversityJi’nan 250359China Department of Soil Science University of Wisconsin-MadisonMadison 53706USA

Different N and P fractions inmicrocosm incubation experiment was measured using highresolution in-situ Peeper and DGT techniques combining with sequential extraction *** results showed the synchronous desorption and release of PO_(4)^(3-),S^(2-)and Fe^(2+)from the solid soil-originated *** trend indicated that the significant reduction of Fe-P and SO_(4)^(2-) occurred in the pore water during the *** concentrations of PO_(4)^(3-) in the overlying water and pore water increased to more than 0.1 and 0.2 mg/L at the beginning of the incubation *** NO_(3)^(-) concentrations from more than 1.5 mg/L to less than 0.5 mg/L combining with increasing NH^(4+) concentrations from less than 1mg/L tomore than 5 mg/L suggested the remarkable NO_(3)-reduction via dissimilatory nitrate reduction to ammonia(DNRA)pathway over *** NH^(4+) concentrations in the pore water aggravated the release of Fe^(2+) through reduction of Fe(Ⅲ)-P as electric acceptors under anaerobic *** process further stimulated the remarkable releasing of labile PO_(4)^(3-) from the solid phase to the solution and potential diffusion into overlying ***,high S^(2-) concentration at deeper layer indicated the reduction and releasing of S^(2-)from oxidation states,which can stimulated the NO_(3)^(-)reduction and the accumulation of NH^(4+)in the pore *** process can also provoke the reduction of Fe-P as electric acceptors following the release of labile PO_(4)^(3-)into pore ***,inundation potentially facilitate the desorption of labile P and attention should be paid during the reclaiming lake from polder.

关键词： Reclaiming lake from polder P release NO3-reduction Fe2+ Microcosmic incubation Experiment Peeper and DGT Peeper and DGT

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Degradation of polyacrylamide (PAM) and methane production by mesophilic and thermophilic anaerobic digestion: Effect of temperature and concentration

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Frontiers of environmental Science & Engineering 2020年第6期14卷 75-85页

作者： Mona Akbar Muhammad Farooq Saleem Khan Ling Qian Hui Wang State Key Joint Laboratory of Environment Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China Sino-Japan Friendship Center for Environmental Protection Beijing 100029China

Polyacrylamide(PAM)is generally employed in wastewater treatment processes such as sludge dewatering and therefore exists in the ***,it degrades slowly and can deteriorate methane yield during anaerobic digestion(AD).The impact or fate of PAM in AD under thermophilic conditions is still *** study mainly focuses on PAM degradation and enhanced methane production from PAM-added sludge during 15 days of thermophilic(55°C)AD compared to mesophilic(35°C)*** and PAM dose from 10 to 50 g/kg TSS were *** results showed that PAM degraded by 76%to 78%with acrylamide(AM)content of 0.2 to 3.3 mg/L in thermophilic ***,it degraded only 21%to 30%with AM content of 0.5 to 7.2 mg/L in mesophilic *** methane yield was almost 230 to 238.4 mL/g VSS on the 8th day in thermophilic AD but was 115.2 to 128.6 mL/g VSS in mesophilic *** investigation revealed that thermophilic AD with continuous stirring not only enhanced PAM degradation but also boosted the organics release from the sludge with added PAM and gave higher methane yield than mesophilic AD.

关键词： Polyacrylamide(PAM)degradation Acrylamide(AM) Mesophilic anaerobic digestion Thermophilic anaerobic digestion Methane production

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Efficient Inactivation of Uv Resistant Bacteria (Urb) by Combined Uv and Chlorine Disinfection

SSRN

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SSRN 2024年

作者： Cao, Ke-Fan Chen, Zhuo Wei, En-Jing Huang, Bang-Hao Gao, Yu-Jia Wu, Yin-Hu Hu, Hong-Ying Environmental Simulation and Pollution Control State Key Joint Laboratory Key Laboratory of Microorganism Application and Risk Control of the Ministry of Ecology and Environment School of Environment Tsinghua University Beijing100084 China Beijing Laboratory for Environmental Frontier Technologies Beijing100084 China Beijing Key Lab for Source Control Technology of Water Pollution College of Environmental Science and Engineering Beijing Forestry University Beijing100083 China Tsinghua Jiangsu Suzhou215163 China

Ultraviolet (UV) is widely used for wastewater and reclaimed water disinfection due to its high efficiency. However, some bacteria exhibit strong resistance to UV disinfection (referred to as UV resistant bacteria, or URB), which can survive after disinfection and pose various risks. In this study, two bacterial strains with strong UV resistance (Deinococcus soli and Sphingomonas panni) were isolated from reclaimed water. Neither single UV disinfection nor single chlorine disinfection can effectively inactivate these URB strains. To effectively control URB, the combined disinfection of UV and chlorine was investigated, and the results showed a significant improvement in inactivation efficiency with synergistic effects. Further analysis using total antioxidant capacity tests, qPCR detection, and SYTO9/PI staining techniques revealed that the main mechanism behind the synergistic effects was the enhanced damage to intracellular content and DNA. Finally, through cost analysis and disinfection tests with actual reclaimed water, the performance of the combined disinfection method was comprehensively evaluated. The results demonstrate combined disinfection has lower costs, higher inactivation rates, and less selectivity. This study can provide a reliable method for controlling the risks caused by URB in water. © 2024, The Authors. All rights reserved.

关键词： Cost benefit analysis

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Research progress on biochar materials for new pollutants removal in the aquatic environment:a mini-review

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Frontiers of environmental Science & Engineering 2025年第3期19卷 99-118页

作者： Wulve Fan Xiaolin Shen Zhiliang Zhu Xiaochang Liu Hua Zhang Yanling Qiu Daqiang Yin State Key Laboratory of Pollution Control and Resource Reuse Tongji UniversityShanghai 200092China Key Laboratory of Yangtze River Water Environment(Ministry of Education) Tongji UniversityShanghai 200092China National Engineering Research Centre of Urban Water Resources Shanghai 200082China School of Urban and Regional Science Shanghai University of Finance and EconomicsShanghai 200433China

Antibiotics,endocrine-disrupting compounds(EDCs),per-and polyfluoroalkyl substances(PFAS),and microplastics(MPs)are crucial constituents of the pollutants frequently detected in various aquatic *** pollutants can negatively affect human health and aquatic *** eliminate these new pollutants from water economically and environmentally,biochar is considered an efficient environmental functional material because of its excellent *** numerous studies have reported the concentration,distribution,and removal methods of individual new pollutants,a comprehensive and systematic understanding of biochar-based materials for the removal of multiple new pollutants from aquatic environments remains to be comprehensively ***,in this mini-review,recent research progress on biochar materials in the decontamination of new pollutants,including antibiotics,EDCs,PFAS,and MPs in different water sources,is summarized,and different mechanisms and influencing factors during the removal process are discussed to have a profound understanding of the application of biochar in the water *** studies on biochar materials for the removal of new pollutants are indicated to enlighten future exploration and alleviate new pollutant burdens in aquatic environments.

关键词： Biochar materials New pollutants Aquatic environment pollution Removal mechanisms

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Urban food-energy-water nexus:a case study in Beijing

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Chinese Journal of Population,Resources and environment 2021年第3期19卷 274-282页

作者： Xinqing Li Lixiao Zhang Pengpeng Zhang Yan Hao Xin Xiong State Key Joint Laboratory of Environmental Simulation and Pollution Control School of EnviromentBeijing Normal UniversityBeijing100875China

Food,energy and water(FEW)are indispensable,irreplaceable and safeguarding resources with tangled interlinkages among each other,often framed in terms of‘nexus’.Cities have become the bustling hubs of resource consumption and production,facing the most intense ***,food security,fresh water shortage and fossil energy exhaustion have become the greatest challenge for the sustainable development of cities in the *** analysis and simulation of dynamic evolution of urban FEW demand and supply and its nexus would add significant and practical value for macro-management such as ensuring the security of urban *** Beijing as the case study,we established a dynamic model for the FEW demand and supply from the perspective of cross-ectoral and cross-regional nexus with the Stella modelling platform,then it was run for simulating the dynamic changes and nexus characteristics of FEW during the interval between 2016 and *** results showed that:①The gap between local production and demand of these three resources in Beijing will continue to *** 2035,Beijing will need 2.16 million tons of grain,0.83 million tons of meat,4.6 billion m3 of water and 91.65 million tons of standard coal of energy while the resources produced and supplied by locality independently will be 0.21 million tons,0.23 million tons,3.3 billion cubic meters and 16.5 million tons of standard coal *** has to draw on cross-boundary production to meet FEW-use with the increasing gap between local supply and demand.②There is a developing trend of the absolute quantity of interaction among ***,the‘outsourcing’feature is obvious and the indigenous nexus links of three resources are shifting to back-end supply chain such as transportation and treatment.③The change of nexus indexes are mainly affected by the mutual and strong dependence between food and *** and energy depend more and more on each other;in contrast,the inter-relationshi

关键词： Food-energy-water(FEW) Nexus Dynamic simulation Stella

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