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SSRN 2023年

作者： Su, Runhua Fu, Huimin Ding, Lili Fu, Bo He, Su Ma, Haijun Hu, Haidong Ren, Hongqiang State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University Nanjing210023 China National Research Base of Intelligent Manufacturing Service Chongqing Technology and Business University Chongqing400067 China School of Environmental and Civil Engineering Jiangsu Key Laboratory of Anaerobic Biotechnology Jiangnan University Wuxi214122 China

NZVI is commonly used in industrial wastewater treatment. However, its long-term inhibition mechanisms of metabolization in anaerobic sludge systems are not well understood. This study investigated the long-term effects of NZVI on methanogenic activity, microbial community, and transcription activity. The results demonstrated that only 5000 mg/L NZVI led to a significant reduction in cumulative methane production (14.4% of control) within 30 days. NZVI adversely affected cell viability, ATP production, and extracellular polymer (EPS), particularly at higher concentrations. Cell membranes played a crucial role in resisting chronic NZVI toxicity. Moreover, high NZVI levels hindered the transcription of key enzymes CoM and mcrA, while low NZVI levels down-regulated the transcription of cdh and hdr, respectively. Besides, amino-utilizing bacteria was reduced under the high NZVI concentration, while low NZVI changed dominant genus with potential protein hydrolysis function from Candidatus Cloacamonas to Sedimentibacter. The similar change was observed in the archaeal community © 2023, The Authors. All rights reserved.

关键词： Wastewater treatment

Distribution and Dynamics of Antibiotic Resistance Genes in a Three-Dimensional Multifunctional Biofilm During Greywater Treatment

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SSRN 2022年

作者： Liu, Ying Wu, Beibei Cui, Xiaocai Ren, Qingqing Ren, Tian Zhou, Yun Xia, Siqing College of Resources and Environment Huazhong Agricultural University Wuhan430070 China State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai200092 China

Antibiotic resistance genes (ARGs) have been identified as serious threats to public health. Despite the widespread in various systems, dynamics of ARGs in three-dimensional multifunctional biofilm (3D-MFB) treating greywater are largely undefined. This work tracked the distributions of eight target genes (intI-1, korB, sul1, sul2, tetM, ermB, blaCTX-M and qnrS) in cell-free liquid, extracellular polymeric substance (EPS) and intracellular polymeric substance (IPS) of 3D-MFB. Results showed that hydraulic retention times (HRT) at 9.0 h achieved the maximum biofilm thickness (137 ± 5 µm) and concentration (5.4 ± 0.1 g volatile suspended solids /m2), and highest linear alkylbenzene sulfonate (LAS) and total nitrogen removal rates at 99.4% and 79.6%, respectively. ARGs presented significant liquid-solid distribution feature, but non-significant with biofilm position. Intracellular ARGs (predominant by intI-1, korB, sul1 and sul2) at bottom biofilm were 210- to 4.2×104- fold higher than that in cell-free liquid. Low HRT and dissolved oxygen stimulated protein-enriched EPS production, leading to high LAS and ARGs accumulation in EPS. EPS-attached LAS showed a strong and nearly linear relationship with most of ARGs (R2 > 0.90, P © 2022, The Authors. All rights reserved.

关键词： Biofilms

Burden of the global energy price crisis on households

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Nature Energy 2023年第3期8卷 304-316页

作者： Guan, Yuru Yan, Jin Shan, Yuli Zhou, Yannan Hang, Ye Li, Ruoqi Liu, Yu Liu, Binyuan Nie, Qingyun Bruckner, Benedikt Feng, Kuishuang Hubacek, Klaus Energy and Sustainability Research Institute Groningen University of Groningen Groningen Netherlands School of Geography Earth and Environmental Sciences University of Birmingham Birmingham United Kingdom Key Laboratory of Regional Sustainable Development Modeling Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing China College of Resources and Environment University of Chinese Academy of Sciences Beijing China College of Economics and Management and Research Centre for Soft Energy Science Nanjing University of Aeronautics and Astronautics Nanjing China State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing China College of Urban and Environmental Sciences Peking University Beijing China School of Economics and Management North China Electric Power University Beijing China Department of Geographical Sciences University of Maryland College ParkMD United States

The Russia–Ukraine conflict has triggered an energy crisis that directly affected household energy costs for heating, cooling and mobility and indirectly pushed up the costs of other goods and services throughout global supply chains. Here we bridge a global multi-regional input–output database with detailed household-expenditure data to model the direct and indirect impacts of increased energy prices on 201 expenditure groups in 116 countries. On the basis of a set of energy price scenarios, we show that total energy costs of households would increase by 62.6–112.9%, contributing to a 2.7–4.8% increase in household expenditures. The energy cost burdens across household groups vary due to differences in supply chain structure, consumption patterns and energy needs. Under the cost-of-living pressures, an additional 78 million–141 million people will potentially be pushed into extreme poverty. Targeted energy assistance can help vulnerable households during this crisis. We emphasize support for increased costs of necessities, especially for food. © 2023, The Author(s), under exclusive licence to Springer Nature Limited.

关键词： Costs

Improving the Efficiency of Machine Learning in Predicting Sediment Heavy Metal Contamination by Adding Feature Selection Methods

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SSRN 2022年

作者： Deng, Ligang Gao, Xiang Xia, Bisheng Wang, Jinhua Dai, Qianying Fan, Yifan Wang, Siyuan Li, Huiming Qian, Xin State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University Nanjing210023 China School of Environment Nanjing Normal University Nanjing210023 China College of Mathematics and Computer Science Yan'an University Yan'An716000 China Key Laboratory of Water Pollution Control and Wastewater Reuse of Anhui Province Anhui Jianzhu University Hefei230009 China

Sediment cores were collected in Taihu Lake and analyzed by radionuclide dating to determine their chronology. Heavy metals and magnetic properties of each core slice were assessed. The concentrations of most heavy metals in Taihu Lake surged at 20 cm from the surface, along with the concentrations of single-domain magnetic particles, consistent with an influence of anthropic activities on the lake’s environment after the 1990s. Two feature selection methods, random forest (RF) and maximal information coefficient (MIC), were combined with a radial basis function support vector machine (RF-SVM) model to construct heavy metal simulation models, with the inclusion of selected key magnetic and physicochemical parameters. Compared with the modeling results obtained with the full set of parameters, a reasonable simulation performance was obtained with RF and MIC. RF performed better than MIC for Cd, Cr, Cu, Pb and Sb when fewer parameters were included. For heavy metals with high ecological risks (As, Cd, Cr, Hg, Pb, Sb), their correlation coefficients for observed and predicted data were 0.73 to 0.97 when only 14–27% of the parameters selected by RF were used as input variables. The RF-RBF-SVM enabled heavy metal predictions based on the magnetic properties of the lake sediments. © 2022, The Authors. All rights reserved.

关键词： Support vector machines

An efficient resin for solid-phase extraction and determination by UPLCMS/MS of 44 pharmaceutical personal care products in environmental waters

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Frontiers of Environmental Science & Engineering 2020年第3期14卷 177-187页

作者： Feng Zhu Zhijian Yao Wenliang Ji Deye Liu Hao Zhang Aimin Li Zongli Huo Qing Zhou Jiangsu Provincial Center for Disease Control and Prevention Nanjing 210009China State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China Jiangsu Guochuang Enviro-protection Technology Co.Ltd. No.19 Changqing AvenueNanjing 211100China

In this study,a hydrophilic resin named GCHM was fabricated based on poly(N-vinyl pyrrolidone-codivinylbenzene),characterized,and applied as a solid-phase extraction(SPE)*** to 44 pharmaceuticals and personal care products(PPCPs)belonging to 10 classes were recovered in environmental water *** variables affecting extraction,such as adsorbent amount,sample pH,and loading speed,were *** optimal conditions,the average absolute recovgy of 44 PPCPs was 75.6%using GCHM,indicating a better performance than the commercial Oasis^*** with home-made hydrophilic polymeric sorbent followed by ultra-performance liquid chromatography and tandem mass spectrometry was validated,and the method achieved good linearity(r2>0.991,for all analytes).In addition,the method detection limits of target compounds ranged from 0.03 to 0.6 ng/*** developed method was applied to determine PPCPs in 10 environmental water samples taken from the Yangtze River,Huaihe River,and Taihu Lake,1 groundwater sample from Changzhou in Jiangsu Province,1 wastewater sample from Xiamen and 2 seawater samples from the Jiulong River in Fujian Province,*** these samples,22 compounds were determined at levels ranging from 0.5 to 1590 ng/L.

关键词： Hydrophilic resin Solid phase extraction Pharmaceuticals and personal care product Ultra-performance liquid chromatography and tandem mass spectrometry Environmental water

Microplastics and Tcep Pollutants in Agricultural Soil: How Do They Disrupt Earthworm Homeostasis by Interfering with Their Metabolites and Gut Microbiota?

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SSRN 2022年

作者： Cao, Jing Wang, Qian Lei, Yumeng Jiang, Xiaofeng Li, Mei State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University Nanjing210023 China School of Environmental Science and Engineering Shanghai Jiao Tong University Shanghai 200240 China

Agricultural soil contamination with plastic film has become a critical global environmental problem, requiring greater research on the possible co-exposure effects of microplastics (MPs) and their additives in soil ecosystems. The presence of MPs and tris (2-chloroethyl) phosphate (Tcep) in agricultural soil was investigated at nine sites in this study. Polyethylene MPs (PE-MPs) and Tcep were found at all nine sites. To study co-exposure effects on soil microbiota and earthworms, and to model a more likely exposure situation, 0.05% (w/w) PE-MPs with three particle size ranges were combined with 1.0 mg/kg Tcep. After 28 days of exposure, there was no indication that added PE-MPs and/or Tcep significantly impacted the soil microbial community structure. In earthworm, size-selective intake, digestion, and egestion of PE-MPs may occur, and Tcep co-exposure affects the residual Tcep concentration in earthworm intestines (3.52–9.31 μg/g dw). Long-term earthworm PE-MPs intake caused intestinal damage, and Tcep co-exposure increased oxidative stress, thereby influencing their feeding behavior and growth, resulting in weight loss (3.42%–14.96%), especially for the most common PE-MPs sizes (0–300 μm). An LC-MS-based metabolomic analysis revealed significantly up-regulated citrate ( p © 2022, The Authors. All rights reserved.

关键词： Microplastic

Wavelength dependency and photosensitizer effects in UV-LED photodegradation of iohexol

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Water Research 2024年 255卷 121477页

作者： Xu, Meng-Yuan Zeng, Chao Lin, Yi-Li Zhang, Tian-Yang Fu, Qi Zhao, Heng-Xuan Luo, Zhen-Ning Zheng, Zheng-Xiong Cao, Tong-Cheng Hu, Chen-Yan Xu, Bin State Key Laboratory of Pollution Control and Resource Reuse Key Laboratory of Urban Water Supply Water Saving and Water Environment Governance in the Yangtze River Delta of Ministry of Water Resources College of Environmental Science and Engineering Tongji University Shanghai200092 China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092 China Department of Safety Health and Environmental Engineering National Kaohsiung University of Science and Technology Kaohsiung 824 Taiwan School of Chemical Science and Engineering Key Laboratory of Road and Traffic Engineering of Ministry of Education Tongji University Shanghai200092 China College of Environmental and Chemical Engineering Shanghai University of Electric Power Shanghai200090 China

Iodinated X-ray contrast media (ICM) are ubiquitously present in water sources and challenging to eliminate using conventional processes, posing a significant risk to aquatic ecosystems. Ultraviolet light-emitting diodes (UV-LED) emerge as a promising technology for transforming micropollutants in water, boasting advantages such as diverse wavelengths, elimination of chemical additives, and no induction of microorganisms’ resistance to disinfectants. The research reveals that iohexol (IOX) degradation escalates as UV wavelength decreases, attributed to enhanced photon utilization efficiency. Pseudo-first-order rate constants (kobs) were determined as 3.70, 2.60, 1.31 and 0.65 cm2 J−1 at UV-LED wavelengths of 255, 265, 275 and 285 nm, respectively. The optical properties of dissolved organic matter (DOM) and anions undeniably influence the UV-LED photolysis process through photon competition and the generation of reactive substances. The influence of Cl− on IOX degradation was insignificant at UV-LED 255, but it promoted IOX degradation at 265, 275 and 285 nm. IOX degradation was accelerated by ClO2−, NO3−and HA due to the formation of various reactive species. In the presence of NO3−, the kobs of IOX followed the order: 265 > 255 > 275 > 285 nm. Photosensitizers altered the spectral dependence of IOX, and the intermediate photoactivity products were detected using electron spin resonance. The transformation pathways of IOX were determined through density functional theory calculations and experiments. Disinfection by-products (DBPs) yields of IOX during UV-LED irradiation decreased as the wavelength increased: 255 > 265 > 275 > 285 nm. The cytotoxicity index value decreased as the UV-LED wavelength increased from 255 to 285 nm. These findings are crucial for selecting the most efficient wavelength for UV-LED degradation of ICM and will benefit future water purification design. © 2024

关键词： Photolysis

An Estimation of Future County-Level Cement Production and Associated Air Pollutant Emissions in China Through Artificial Neural Networks

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SSRN 2024年

作者： Xu, Jiayu Yang, Jinya Dong, Jiaxing Li, Siwei Xing, Jia Zhao, Yu State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University 163 Xianlin Rd. Jiangsu Nanjing210023 China Hubei Key Laboratory of Quantitative Remote Sensing of Land and Atmosphere School of Remote Sensing and Information Engineering Wuhan University Hubei 430079 China Tsinghua University China Nanjing University of Information Science and Technology Jiangsu 210044 China

Cement production and its air pollutant and carbon dioxides (CO2) emissions in China will be relocated greatly as a joint effect of diverse development of industrial economy and implementation of environmental policies for different regions. The future pathway and spatial pattern of emissions are important for policy making of air quality improvement and carbon emission abatement, as well as coordinating regional development. In this study, we developed an artificial neural network (ANN) model to predict cement production at the county level and to calculate the associated emissions of air pollutants and CO2 at the county level till 2060. Results show that the cement production will decline from 2,327 million metric tons (Mt) in 2015 to 770 Mt in 2060 under the Shared Socioeconomic Pathways 1 (SSP1). Counties closer to provincial capital will experience greater retirement of cement industry. Likewise, the emissions of air pollutants and CO2 will experience a steady downward trend driven by the declining cement production and the improvement of pollution control technologies. There will be a more significant regional heterogeneity in the reduction of production and emissions at city level compared to the province level. With the clearance for more than two-thirds of counties, future cement production and emissions will be more intensively distributed in a few cities. The shares of emissions in southwestern regions will grow from 2015 to 2060 while those of eastern regions will continue decreasing. The comparison between the changing spatial distributions of emissions and gross domestic product (GDP) indicates a positive effect of existing policies in reconciling regional economic development and air pollution controls. The outcome could support the analyses on the impact of industrial development on air quality and public health, and the method can be applied widely for other industrial sectors for a more comprehensive understanding of future emission relocation. ©

关键词： Carbon dioxide

Foliar Application of Sio2 and Zno Nanoparticles Affected Polycyclic Aromatic Hydrocarbons Uptake of Amaranth (Amaranthus Tricolor L.): A Metabolomics and Typical Statistical Analysis

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SSRN 2022年

作者： Cai, Yue Yuan, Binbin Ma, Xiaoyue Fang, Guodong Zhou, Dongmei Gao, Juan Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil Science Chinese Academy of Sciences Nanjing210008 China University of Chinese Academy of Sciences Beijing100049 China State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China

Nano-enabled foliar-application could be an ideal strategy for advancing agricultural productivity. However, it remains largely unknown whether they inhibit or promote uptake of pollutants. Here, we systematically examined how foliar applying SiO2 nanoparticle (nSiO2 ) and ZnO nanoparticle (nZnO) (20 nm, 100 mg·L-1 ), influence polycyclic aromatic hydrocarbons (PAHs) uptake in 4-week-old amaranth ( Amaranthus tricolor L.). Tesults showed that foliar application of nSiO2 or nZnO enhanced amaranth biomass by 20.2-26.4% but decreased PAHs bioaccumulation in leaves by 20.4-54.9% after 7-d incubation. Changes regarding amino acid related pathways (alanine/aspartate/glutamate metabolism and arginine biosynthesis) and energy maintenance pathways (TCA cycle) were observed after foliar application. Specific PLS-DA analyses with total PAHs uptake as the biological endpoint showed that the contents of PAHs positively correlated with valine (R2 = 0.799) and tyrosine (R2 = 0.789), but negatively correlated with D-tagatose (R2 = 0.805) and L-gulonolactone (R2 = 0.877), indicating greater oxidant stress under higher PAHs level. We propose that mechanisms of declined uptake of PAHs involves the biomass-dependent dilute effect and activation of biological response against PAHs accumulation. These findings provide a prospective vision on how nano-enabled foliar-application alleviates PAH-enriched environmental burden while produce higher-yield agricultural products, especially for low toxic and biocompatible nSiO2 © 2022, The Authors. All rights reserved.

关键词： Polycyclic aromatic hydrocarbons

Composition of Virus Communities and Dynamic Changes in Municipal Wastewater Treatment Plant in Tianjin, China

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SSRN 2023年

作者： Peng, Liang Yang, Fengxia Shi, Jingliang Liu, YiXin Pan, Liuzhu Mao, Daqing Luo, Yi College of Environmental Science and Engineering Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria Nankai University Tianjin300071 China State Key Laboratory of Pollution Control and Resource reuse School of the Environment Nanjing university Nanjing210093 China School of Medicine Nankai University Tianjin300071 China Agro-Environmental Protection Institute Ministry of Agriculture and Rural Affairs Tianjin300191 China

Environmental viruses in wastewater and sludge are widely recognized for their roles in waterborne diseases. However, previous studies mainly focused on RNA viruses, little is known about the diversity of DNA viral communities and their driving factors in municipal wastewater treatment environments. Herein, we conducted a pilot study to explore DNA virus profiles in municipal wastewater and recycled sludge by metagenomics method, as well as track their temporal changes in northern China. Results showed that 467 viral species were co-shared among all the samples. We identified 13 families of human viruses with a prevalence of 0.1%, which were rare but relatively stable in wastewater and sludge for six months. Adenoviridae, Parvoviridae, Herpersviridae were the most dominant human viral families in municipal wastewater and recycled sludge. A time series of samples revealed that the dynamic changes of human DNA viruses were stable based on qPCR results, particularly for high risk fecal-oral transmission viruses of adenovirus, bocavavirus, and polyomavirus. Concentrations of Adenovirus (5.39-7.48log10 copies/mL) and bocavirus (4.36-7.48 log10 copies/mL) were observed to be the highest in these samples compared to other viruses. Our findings demonstrated the high prevalence and persistence of DNA viruses in municipal wastewater treatment environments, also highlighting the value of enhancing public health responses based on wastewater-based viral epidemiology. © 2023, The Authors. All rights reserved.

关键词： DNA