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A Novel Self-sourced Extracellular Polymeric Substances-Doped Residual Sludge-Based Biochar Loaded with Nano Zero-Valent Iron Reinforces Anaerobic Digestion Methanogenesis: Performance and Community Structure Succession

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SSRN 2024年

作者： Li, Jibin Wu, Siqi Zhang, Weiming Pan, Bingcai Hua, Ming State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University Nanjing210023 China

Anaerobic digestion is an effective wastewater energization technology, but suffers from low energy conversion efficiency. In this study, a novel composite of extracellular polymeric substances-doped residual sludge-based biochar loaded with nano zero-valent iron (NZVI@EPSBC) was successfully prepared, which had a significant promotion effect on anaerobic digestion methanogenesis. In comparison to the control, the methane yield with 100 mg/L NZVI@EPSBC was raised by approximately 1.4-fold. The NZVI@EPSBC did not significantly change the morphology of the inoculated granular sludge, but induced the secretion of proteins and humic substances in the extracellular EPS, which are beneficial for carbon conversion and extracellular electron transport at the microscopic scale. Meanwhile, the quantitative analysis of the electron transport system also confirmed that NZVI@EPSBC could significantly improve the electron transfer efficiency in microbial respiratory chain throughout the experimental cycle, in which the highest respiratory efficiency increase of 26.51% at 48 h. Taxonomic analysis of microbial communities showed that NZVI@EPSBC exhibited complete retention of bacteria and archaea compared to the raw sludge, while realizing an efficient cooperative pattern of syntrophic bacteria by regulating the relative abundance of specific functional bacteria, like Anaerolineaceae and Methanosaeta. Overall, the study offers a valuable strategy for achieving resourcefulness of residual sludge and extracellular polymeric substances along with facilitating efficient energy recovery from wastewater. © 2024, The Authors. All rights reserved.

关键词： Anaerobic digestion

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Reproductive Influences of Erythromycin and Sulfamethoxazole on Caenorhabditis elegans over Generations Mediated by Lipid Metabolism

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Chemical Research in Chinese Universities 2023年第3期39卷 434-440页

作者： YU Zhenyang WANG Lei LI Gaotian ZHANG Jing Ecological Technique and Engineering College Shanghai Institute of TechnologyShanghai201418P.R.China Jiaxing Tongji Institute for Environment Jiaxing314051P.R.China State Key Laboratory of Pollution Control and Resource Reuse Key Laboratory of Yangtze River Water EnvironmentMinistry of EducationCollege of Environmental Science and EngineeringTongji UniversityShanghai200092P.R.China

Antibiotics are emerging pollutants with ***,their reproductive toxicities over generations and underlying mechanisms were seldom *** the present study,reproductive effects of erythromycin(ERY)and sulfamethoxazole(SMZ)were studied on Caenorhabditis elegans(***)with multi-generational exposure from F1 to F4,and their effects in the non-direct exposed offspring of F1 and F4(T4 and T4’)were explored to investigate trans-generational *** high concentrations,ERY and SMZ inhibited the reproduction and the inhibition decreased with more generations’*** low concentrations,SMZ stimulated reproduction in T4,opposite to its inhibition in *** analysis on ten enzymes and proteins in lipid and glucolipid metabolism showed that ERY commonly inhibited fatty acid synthetase(FAS)in F1 to F4,while ERY and SMZ showed stimulation and inhibition on other *** biomarker response(IBR)index values showed that ERY and SMZ stimulated the overall metabolism in F1,and the stimulation decreased and even altered to inhibition in later *** comparing multi-and trans-generational effects,ERY and SMZ at high concentration caused inhibition on reproduction in T4 and stimulation in T4’,which were opposite to those in F1 and F4.

关键词： Multi-generational effect Antibiotic Reproduction Lipid metabolism

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The regulating strategy of hierarchical structure and acidity in zeolites and application of gas adsorption: A review

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Chinese Chemical Letters 2024年第11期35卷 214-225页

作者： Jie Ma Jianxiang Wang Jianhua Yuan Xiao Liu Yun Yang Fei Yu Research Center for Environmental Functional Materials State Key Laboratory of Pollution Control and Resource ReuseCollege of Environmental Science and EngineeringTongji UniversityShanghai 200092China School of Civil Engineering Kashi UniversityKashi 844000China Shanghai Baoye Engineering Technology Ltd. Shanghai 200941China College of Marine Ecology and Environment Shanghai Ocean UniversityShanghai 201306China

Gas adsorption remains an attractive area of *** hierarchical structure can reduce diffusion limitations and facilitate molecular transport,while acid sites can be used as adsorption *** make zeolites widely used in the field of gas *** to obtain zeolite adsorbents with better adsorption properties by modulating the hierarchical structure and acid sites is a pressing issue *** review highlights the strategies to modulate the hierarchical structure as well as the acid sites;and then explains how these strategies are *** mechanism of zeolite adsorption on gases is then described in terms of these two ***,the adsorption properties of zeolites for certain gases under specific conditions are *** outlook of zeolite hierarchical structures and acid site modulation strategies is given.

关键词： Zeolite Regulation strategy Hierarchical structure Acid sites Gas adsorption

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Occurrence, partition behavior, source and ecological risk assessment of nitro-PAHs in the sediment and water of Taige Canal, China

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Journal of Environmental Sciences 2023年第2期124卷 782-793页

作者： Jijie Kong Tao Ma Xiaoyu Cao Weidi Li Fengxiao Zhu Huan He Cheng Sun Shaogui Yang Shiyin Li Qiming Xian School of Environment Nanjing Normal UniversityNanjing 210023China School of Geography Nanjing Normal UniversityNanjing 210023China The State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China Fujian Provincial Key laboratory of Eco-Industrial Green Technology College of Ecological and Resource EngineeringWuyi UniversityWuyishan 354300China Nanjing Institute of Environmental Sciences Ministry of Ecology and EnvironmentNanjing 210042China

Nitrated polycyclic aromatic hydrocarbons(NPAHs)are widespread organic pollutants that possess carcinogenic and mutagenic properties,so they may pose a risk to the environment and human *** this study,the concentrations of 15 NPAHs and 16 polycyclic aromatic hydrocarbons(PAHs)in 30 surface water samples and 26 sediment samples were measured in 2018 from the Taige Canal,one of the main rivers flowing into Taihu Lake,*** total NPAH concentrations in water and sediment ranged from 14.7 to 235 ng/L and 22.9 to 96.5 ng/g dw,respectively.9-nitrophenanthrene(nd–76.3 ng/L)was the dominant compound in surface water,while 2+3-nitrofluoranthene(1.73–18.1 ng/g dw)dominated in *** PAHs,concentration ranging from 1,097 to 2,981 ng/L and 1,089 to 4,489 ng/g dw in surface water and sediment,*** was a strong positive correlation between the log octanol-water partition coefficient(Kow)and log sediment-water partition coefficient due to hydrophobic *** fugacity fraction value increased with the decrease of log Kow,and chrysene was transferred from water into *** residual NPAHs in surface water and sediment of the Taige Canal have partial *** engine and coal combustion emissions were probably the principal sources of NPAHs in surface water and *** results of ecological risk assessment showed that some NPAHs inwater(e.g,1-nitropyrene and 6-nitrochrysene)and sediment(e.g.,2-nitrobiphenyl,5-nitroacenaphthene,9-nitrophenanthrene and 2+3-nitrofluoranthene)had moderate ecological risks,which should be of concern.

关键词： Nitrated polycyclic aromatic hydrocarbons(NPAHs) Occurrence Partition behavior source apportionment Ecological risk assessment

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A critical review on quantitative evaluation of aqueous toxicity in water quality assessment

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Chemosphere 2023年 342卷 140159页

作者： Zhang, Linyu Zhang, Yu Zhu, Mengyuan Chen, Ling Wu, Bing State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University Nanjing210023 China

Conventional chemical techniques have inherent limitations in detecting unknown chemical substances in water. As a result, effect-based methods have emerged as a viable alternative to overcome these limitations. These methods provide more accurate and intuitive evaluations of the toxic effects of water. While numerous studies have been conducted, only a few have been applied to national water quality monitoring. Therefore, it is crucial to develop toxicity evaluation methods and establish thresholds based on quantifying toxicity. This article provides an overview of the development and application of bioanalytical tools, including in vitro and in vivo bioassays. The available methods for quantifying toxicity are then summarized. These methods include aquatic life criteria for assessing the toxicity of a single compound, comprehensive wastewater toxicity testing for all contaminants in a water sample (toxicity units, whole effluent toxicity, the potential ecotoxic effects probe, the potential toxicology method, and the lowest ineffective dilution), methods based on mechanisms and relative toxicity ratios for substances with the same mode of action (the toxicity equivalency factors, toxic equivalents, bioanalytical equivalents), and effect-based trigger values for micropollutants. The article also highlights the advantages and disadvantages of each method. Finally, it proposes potential areas for applying toxicity quantification methods and offers insights into future research directions. This review emphasizes the significance of enhancing the evaluation methods for assessing aqueous toxicity in water quality assessment. © 2023 Elsevier Ltd

关键词： Water quality

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Microstructure-Dependent Ion Selectivity in Graphene Oxide-Based Membranes

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ACS Applied Materials and Interfaces 2025年第22期17卷 32806-32815页

作者： Ren, Jing Chen, Xinran Tong, Xin State Key Laboratory of Pollution Control and Resource Reuse Shanghai Institute of Pollution Control and Ecological Security Tongji Advanced Membrane Technology Center School of Environmental Science and Engineering Tongji University 1239 Siping Road Shanghai200092 China

Graphene oxide (GO) membranes hold promise for precise separation due to their unique laminar structures and tunable separation properties. However, although water transport in GO membranes has been extensively investigated, the key mechanisms governing ion transport and selectivity remain poorly understood. In this work, we fabricated pristine and propylenediamine (PPD)/pentamethylenediamine (PTD)-cross-linked GO membranes via vacuum filtration and employed low-field nuclear magnetic resonance (LF-NMR) to elucidate their nanoscale pore architectures, including pinholes and structural defects. Our results show that cross-linking leads to a more ordered arrangement of the nanochannels and reduces the dimensions of structural defects. Ion diffusion experiments demonstrated that the membrane microstructure plays a crucial role in determining the tortuosity of the ion transport pathways. Notably, large structural defects dominate ion transport;when present, ions tend to bypass the interlayer nanochannels, leading to reduced ion selectivity. In contrast, intrinsic pinholes are too small to significantly contribute to ion transport. Molecular dynamics simulations showed that interlayer spacing, ion properties, and interactions with the membrane jointly govern ion diffusion within the GO-based nanochannels. More importantly, the simulation results deviated from experimental observations, further implying the pivotal role of large structural defects in ion transport. These findings provide valuable guidelines for designing next-generation GO-based membranes with improved ion selectivity and performance for precise separation. © 2025 American Chemical Society.

关键词： Crosslinking

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Inhibition effect of magnetic field on nitrous oxide emission from sequencing batch reactor treating domestic wastewater at low temperature

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Journal of Environmental Sciences 2020年第1期32卷 205-212页

作者： Dan Xu Hongmin Ji Hongqiang Ren Jinju Geng Kan Li Ke Xu State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing University

This study aims to investigate the effect of a magnetic field on nitrous oxide(N2O)emission from a sequencing batch reactor treating low-strength domestic wastewater at low temperature(10℃).After running for 124 days in parallel,results indicated that the conversion rate of N2O for a magnetic field-sequencing batch reactor(MF-SBR)decreased by34.3%compared to that of a conventional SBR(C-SBR).Meanwhile,the removal efficiencies for total nitrogen(TN)and ammonia nitrogen(NH4-N)of the MF-SBR were 22.4%and 39.5%higher than those of the ***-throughput sequencing revealed that the abundances of AOB(Nitrosomonas),NOB(Nitrospira)and denitrifiers(Zoogloea),which could reduce N2O to N2,were promoted significantly in the *** activities(Nir)and gene abundances(nos Z nir S and nir K)for denitrification in the MF-SBR were also notably higher compared to *** study shows that application of a magnetic field is a useful approach for inhibiting the generation of N2O and promoting the nitrogen removal efficiency by affecting the microbial characteristics of sludge in an SBR treating domestic wastewater at low temperature.

关键词： Magnetic field Low temperature N2O emission Biological nitrogen removal High-throughput 16S rRNA gene sequencing

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Pyrrhotite-sulfur-limestone composite for high rate nitrogen and phosphorus removal from wastewater: Column study

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Chemosphere 2024年 347卷 140711页

作者： Yang, Yinuo Huang, Gaopan Chen, Changxin Li, Ruihua State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University 163# Xianlin Avenue Nanjing210023 China

Pyrrhotite-sulfur-limestone composite (PSLC) was prepared and PSLC autotrophic denitrification biofilter (PSLCAD) was constructed with PSLC particle (2–4.75 mm) in this study. During treating synthetic, municipal and industrial secondary effluent, PSLCAD showed good NO3−-N and PO43--P removal, and the highest TON (Total oxidized nitrogen) removal rate of PSLCAD was up to 1749.91 mg/L/d. At HRT 0.5 h, and influent NO3−-N 21.09 mg/L, TON removal rate was up to 1005.12 mg/L with effluent NO3−-N 0.10 mg/L. PSLCAD achieved effluent PO43--P below 0.2 mg/L when influent PO43--P was around 0.5 mg/L. HRT down to 0.5 h had no negative impacts on N removal. Effluent pH below 7 was harmful to denitrification performance of PSLCAD. TON removal rate increased with influent NO3−-N increasing, but influent NO3−-N over 103.55 mg/L decreased NO3−-N removal rate. In PSLCAD biofilter, the most dominant bacteria were Thiobacillus and Sulfurimonas, and they played the most important role in denitrification, but the abundance of heterotrophic denitrifiers was also quite high. PO43− was mainly removed through precipitate of Fe–P in PSLCAD. The synergistic effects between pyrrhotite and sulfur autotrophic denitrification were much enhanced, and that caused PSLCAD to achieve high rate N and P removal. © 2023 Elsevier Ltd

关键词： Limestone

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Risk assessment and identification of factors influencing the historical concentrations of microcystin in Lake Taihu, China

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Journal of Environmental Sciences 2023年第5期127卷 1-14页

作者： Chen Cheng Alan D.Steinman Kaiye Zhang Qi Lin Qingju Xue Xing Wang Liqiang Xie State Key Laboratory of Lake Science and Environment Nanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing 210008China University of Chinese Academy of Sciences Beijing 100049China Annis Water Resources Institute Grand Valley State University740 West Shoreline DriveMuskegonMIUSA National Engineering Laboratory for Lake Pollution Control and Ecological Restoration Chinese Research Academy of Environmental SciencesBeijing 100012China State Environmental Protection Key Laboratory of Drinking Water Source Protection Chinese Research Academy of Environmental SciencesBeijing 100012China

Understanding the history of microcystins(MCs)pollution in large lakes can help inform future lake *** collected sediment cores from Lake Taihu to:investigate the long-term record of MCs(MC-LR,MC-YR,and MC-RR),explore the main environmental drivers of MCs,and assess their public health and ecological *** showed that MCs content in all cores increased over *** core from north Taihu had the highest MC concentrations,with an average total MCs(sum of MC-LR,MC-YR,and MC-RR=TMCs)content of(74.31±328.55)ng/*** core from eastern Taihu showed the lowest average TMCs content of(2.91±3.95)ng/*** showed that sediment MCs at the three sites were positively correlated with sediment ***-LR and MC-YR in northern and western Taihu negatively correlated with both the sediment total organic carbon/sediment total nitrogen ratio(STOC/STN)andwater nitrate(NO_(3)^(−)-N)concentration,but three MC congeners at eastern Taihu showed positive correlations with water orthophosphate(PO_(4)^(3−)-P),NO_(3)^(−)-N,and STOC/*** additive model analysis at each site revealed that NO_(3)^(−)-N was the main TMCs driver in northern andwestern Taihuwhere phytoplankton dominated,whereasPO_(4)^(3−)-P was the main TMCs driver in eastern Taihu where macrophytes *** the whole lake scale,total phosphorus(TP)andPO_(4)^(3−)-P were the most important environmental drivers influencing MCs;TP explained 47.4%,44.2%,and 47.6%while orthophosphate explained 34.8%,31.2%,and 34.7%of the deviance on TMCs,MC-LR,and MC-YR,***_(3)^(−)-N also showed a strong effect on MCs variation,especially on *** assess-ment showed that both ecological and public health risk has increased in recent *** conclude that while control of phosphorus and nitrogen input should be a major focus for future lake management,lake zone-specificmanagement strategiesmay also be important.

关键词： Microcystins pollution history Orthophosphate Nitrate Risk assessment Lake Taihu

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Comprehensive understanding of guest compound intercalated layered double hydroxides: Design and applications in removal of potentially toxic elements

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Critical Reviews in Environmental Science and Technology 2023年第4期53卷 457-482页

作者： Cui, Shihao Peng, Yutao Yang, Xiao Gao, Xing Guan, Chung-Yu Fan, Beibei Zhou, Xue Chen, Qing Beijing Key Laboratory of Farmland Soil Pollution Prevention and Remediation College of Resources and Environmental Sciences China Agricultural University Beijing China School of Agriculture Sun Yat-sen University Guangdong Shenzhen China Key Laboratory of Land Surface Pattern and Simulation Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences Beijing China State Key Laboratory for Pollution Control and Reuse School of Environmental Science and Engineering Tongji University Shanghai China Department of Environmental Engineering National I-Lan University Yilan Taiwan

Layered double hydroxides (LDHs) and LDHs-derived materials are emerging as potential engineered adsorbents for the protection of water environment. Particularly, LDHs intercalated with different guest compounds (GC-LDHs), which differ from traditional interlayer anions (such as Cl−, SO42−, NO3−, CO32−, and PO43−), are widely reported by recent studies showing their promising multifunctional roles in water purification. Herein, this review systematically presents the synthesis methods and characterization techniques of GC-LDHs and their application as adsorbents in removing potentially toxic elements (PTEs) from the aqueous phase. This review also elaborates on the important roles of complexation, chelation, precipitation, isomorphic substitution, and ion exchange in the process of PTE removal by GC-LDHs. Among them, compared with PTE cations, ion exchange is an additional mechanism for the removal of PTE oxyanions by GC-LDHs. Furthermore, the influence of pH, ionic strength, temperature, physiochemical properties of original LDHs and guest compounds on the GC-LDHs adsorption performance are also summarized. Finally, the development trends and future challenges related to GC-LDHs are proposed. © 2022 Taylor & Francis Group, LLC.

关键词： Ion exchange

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