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Microbial dynamics and CO consumption enhancement via co-digestion with carbohydrate-rich synthetic wastewater

Science of the Total environment 2025年 968卷 178887页

作者： Li, Chunxing Bao, Ruihan Sun, Yan Quan, Jiawei Angelidaki, Irini Yuan, Zengwei State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China Lishui Institute of Ecology and Environment Nanjing University Nanjing211200 China Department of Chemical and Biochemical Engineering Technical University of Denmark Kgs. LyngbyDK-2800 Denmark

Due to the toxicity and low mass transfer of CO, its efficient conversion is crucial for syngas biomethanation. In the present study, anaerobic co-digestion of CO and carbohydrate-rich synthetic wastewater was conducted to facilitate the CO conversion performance, followed by microbial analysis with and without methanogenic activity inhibition (namely, digestion and acidification systems). The results indicated that glucose addition in co-digestion system dramatically enhanced CO consumption. The maximum consumption rate (μ-max) of CO increased by about 65 % with adding glucose. However, CO presented partial inhibition on methanogenic activity without declining methane yield. Microbial analysis showed that microbial diversity increased in co-digestion systems. Hydrogenotrophic methanogens from Methanobrevibacter became dominant in all individual and co-digested systems. Methanogenic activity inhibited community proved the bacteria mainly mediated CO conversion, and glucose addition promoted the growth of acetogenic bacteria from Firmicutes, relating to the enhancement in CO consumption. Species from Synergistota worked as the main syntrophic oxidizers, along with Defluviitoga, Syntrophomonas, and Syntrophaceticus, assisting methane production by hydrogenotrophic methanogens. The outcomes in the present study supply an efficient strategy for synergetic treatment of syngas (CO-rich gas) and organic waste/wastewater for energy recovery. © 2025 Elsevier B.V.

关键词： Carbohydrate-rich synthetic wastewater Carbon monoxide Carboxydotroph Co-digestion Microbial analysis Syngas biomethanation

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Combination of suspect and nontarget screening with exposure assessment for per- and polyfluoroalkyl substance prioritization in Chinese municipal wastewater

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environment International 2025年 198卷 109384页

作者： Mu, Hongxin Chen, Ling Zhou, Rong Gu, Luyao Yu, Yue Tang, Jin Zhang, Houhu Ren, Hongqiang Wu, Bing Bu, Yuanqing Research Center of Solid Waste Pollution and Prevention Nanjing Institute of Environmental Science Ministry of Ecology and Environment Nanjing210042 China State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University Nanjing210023 China School of Environmental Science and Engineering Nanjing University of Information Science and Technology 219 Ningliu Road Nanjing210044 China

Municipal wastewater treatment plants (WWTPs) are significant sources of per- and polyfluoroalkyl substances (PFASs) in aquatic environments, making their identification and priority rank crucial for risk control. Wastewater samples were collected from 148 municipal WWTPs in China to determine the occurrence and risk prioritization of PFASs. A total of 61 PFASs were identified, including 14 legacy and 47 emerging PFASs, using machine learning prediction-enhanced suspect and nontarget screening techniques. PFASs were detected in all wastewater samples, with perfluorocarboxylic acid (PFCA), perfluorosulfonic acid (PFSA), fluoromeric sulfonic acid (FTSA), and perfluoroalkyl sulfonamide-like (PFSM) substances being the predominant classes. The exposure loads of legacy and emerging PFASs to the Chinese population were 71.8 and 52.9 μg·day−1·people−1, respectively, and textile and clothing products might be the primary PFAS exposure pathways. Through a risk prioritization method integrating toxicity and exposure data, ten legacy and five emerging PFASs were flagged as high-priority substances requiring additional attention. As the PFAS risk removal efficiency by conventional biological treatment processes was only 0.7 %, the PFAS risk priority patterns in influent and effluent were similar (r = 0.86, p © 2025 The Author(s)

关键词： Wastewater treatment

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Enhanced synergistic removal of Cu(II) and Cr(VI) with multifunctional biomass hydrogel from strong-acid media

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Chemosphere 2023年 345卷 140490页

作者： Wang, Liting Jiang, Yanni Lu, Lingxiao Zhang, Weiguo Li, Tanshang Liu, Zicheng Liu, Fuqiang Li, Aimin State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China Nanjing University & Yancheng Academy of Environmental Protection Technology and Engineering Yancheng224000 China

Simultaneous recovery of heavy metal ions (HMIs) such as Cu(II) and Cr(VI) from strong-acid media was a great challenge due to the inhibition of protons. Herein, a novel biomass hydrogel (CMC/PEI-PD) containing various groups (bis-picolylamine, amino, and hydroxyl groups) was newly prepared by a facile two-step process. The static experiments relating pH, kinetics and isothermal co-adsorption confirmed the synergistic effect towards Cu(II) and Cr(VI) consistently. Specifically, the adsorption capacities of Cu(II) and Cr(VI) at pH 2.0 increased by 23.73% and 40.18% in comparison with the single systems. Moreover, coexistence of inorganic anions and cations could further increase the adsorption of Cu(II) and Cr(VI) by 59.90% and 43.39%, respectively. At the same time, the adsorption and desorption ratios for both HMIs remained stable. The superior performance came from the two dominant mechanisms of co-removal. On the one hand, Cu(II) chelated by bis-picolylamine group attracted Cr(VI) in the form of cation bridge, thus promoting Cr(VI) adsorption. On the other hand, the protonated amine group attracted Cr(VI) by electrostatic interaction and weakened the inter-cationic repulsion by electrostatic shielding, thus promoting Cu(II) adsorption. In addition, the dynamic column experiment towards simulated acidic electroplating wastewater involving Cu(II)–Cr(VI)–Ni(II) certified the high efficiency and feasibility of the co-removal. Therefore, CMC/PEI-PD owned great potential in the separation of typical HMIs even directly from strong-acid media. © 2023 Elsevier Ltd

关键词： Biomass

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The Occurrence, Tissue Distribution, and Pbt Potential of Per- and Polyfluoroalkyl Substances in the Freshwater Organisms from the Yangtze River Via Nontarget Analysis

SSRN

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SSRN 2023年

作者： Jiao, Zhaoyu Yu, Nanyang Mao, Jiadi Jiao, Liping Wang, Xuebing Shi, Wei Yu, Hongxia Wei, Si State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing China Third Institute of Oceanography Ministry of Natural Resources Xiamen China

Numerous emerging per- and polyfluoroalkyl substances (PFASs) occur in the aquatic environment, posing a threat to aquatic ecosystems and human health. In this study, we conducted a nontarget analysis on 3 surface water samples and 92 tissue samples of 16 fish collected from the Yangtze River to investigate the patterns, tissue distribution, and environmental impacts of legacy and emerging PFASs. A total of 43 PFASs from 11 classes were identified, including 17 legacy PFASs and 26 emerging PFASs. Among the 43 PFASs, seven PFASs were reported in biota for the first time while five PFASs were reported in the environment for the first time. Chlorine substituted perfluoroalyl ether sulfonic acids were the major emerging PFASs detected in organisms. Our results showed that most PFASs tended to bioaccumulate in the liver, whereas perfluorinated sulfonamides tended to accumulate in the blood. Method for evaluating the persistence, bioaccumulation and toxicity (PBT) of PFASs were developed by combining the in-silico methods and experimental data. Long-chain PFASs were found to have extremely higher PBT scores than short-chain PFASs. Additionally, most emerging PFASs exhibited comparable PBT characteristics with legacy PFASs, especially Cl-substituted PFASs. © 2023, The Authors. All rights reserved.

关键词： Ethers

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Flow analysis of major and trace elements in residues from large-scale sewage sludge incineration

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Journal of environmental Sciences 2021年第4期33卷 99-109页

作者： Siyuan Yu Hua Zhang Fan Lü Liming Shao Pinjing He State Key Laboratory of Pollution Control and Resource Reuse Tongji UniversityShanghai 200092China Institute of Waste Treatment&Reclamation College of Environmental Science and EngineeringTongji UniversityShanghai 200092China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China

Increase of sewage sludge(SS)has led to the construction of more incineration plants,exacerbating to the production of SS incineration ***,few studies have considered the mass balance of elements in large-scale SS incineration plants,affecting the residues treatment and *** this study,flow analysis was conducted for major and trace elements in the SS,the fly ash(sewage sludge ash,SSA)and bottom ash from two large-scale SS incineration *** elemental characteristics were compared with those of coal fly ash(CFA),and air pollution control residues from municipal solid waste incineration(MSWIA),as well as related *** results showed that the most abundant major element in SSA was Si,ranging from 120 to 240 g/kg,followed by Al(76–348 g/kg),Ca(26–113 g/kg),Fe(35–80 g/kg),and P(26–104 g/kg),and the trace elements were mainly Zn,Ba,Cu,and *** all the major elements were derived from *** trace elements in the SS incineration residues accounted for 82.4%–127%of those from SS,indicating that SS was the main source of trace *** partitioning of heavy metals in the SS incineration residues showed that electrostatic precipitator ash or cyclone ash with high production rates were the major pollutant *** differences in some major and trace elements could be indicators to differentiate SSA from CFA and *** with related land criteria,the pollutants in SSA should not be ignored during disposal and utilization.

关键词： Sewage sludge ash Sewage sludge incineration Electrostatic precipitator ash Cyclone ash Flow analysis Mass balance

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Modulation of marine heatwaves by salinity effect in the Northeast Pacific Ocean in 2013-2014

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Acta Oceanologica Sinica 2025年第1期44卷 17-27页

作者： Xiaokun Wang Hai Zhi Ronghua Zhang Jiaxiang Gao Pengfei Lin School of Atmospheric Sciences Nanjing University of Information Science and TechnologyNanjing 210044China Henan Meteorological Disaster Prevention Technology Center Zhengzhou 450003China School of Marine Sciences Nanjing University of Information Science and TechnologyNanjing 210044China Laoshan Laboratory Qingdao 266237China Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Collaborative Innovation Center of Atmospheric Environment and Equipment TechnologySchool of Environmental Science and EngineeringNanjing University of Information Science and TechnologyNanjing 210044China State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China

Marine heatwaves(MHWs)are extreme ocean events characterized by anomalously warm upper-ocean temperatures,posing significant threats to marine *** various factors driving MHWs have been extensively studied,the role of ocean salinity remains poorly *** study investigates the influence of salinity on the major 2013-2014 MHW event in the Northeast Pacific using reanalysis data and climate model *** results show that salinity variabilities are crucial for the development of the MHW ***,a significant negative correlation exists between sea surface temperature anomalies(SSTAs)and sea surface salinity anomalies(SSSAs)during the MHW,with the SSSAs emerging simultaneously with SSTAs in the same *** salinity anomalies(SAs)result in a shallower mixed layer,which suppresses vertical mixing and thus sustains the upper-ocean ***,salinity has a greater impact on mixed layer depth anomalies than *** sensitivity experiments further demonstrate that negative SAs during MHWs amplify positive SSTAs by enhancing upper-ocean stratification,intensifying the ***,our analysis indicates that the SAs are predominantly driven by local freshwater flux anomalies,which are mainly induced by positive precipitation anomalies during the MHW event.

关键词： marine heatwave salinity effect ocean stratification and mixing sea surface temperature Northeast Pacific Ocean

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Transformation and drive mechanism of nitrogen functional genes at estuaries in dry and wet seasons

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Chemosphere 2024年 363卷 142938页

作者： Huang, Jian Jin, Changzhou Zhang, Hua Zhao, Bingbing Man, Yacan Zhang, Jiamei Shuai, Zichen School of Environmental and Energy Engineering Anhui Jianzhu University Hefei230601 China Anhui Provincial Key Laboratory of Environmental Pollution Control and Resource Reuse Hefei230601 China Pollution Control and Resource Utilization in Industrial Parks Joint Laboratory of Anhui Province Hefei230601 China

The nitrogen cycle plays a vital role in maintaining ecological health and biodiversity. In aquatic systems, nitrogen transformation genes significantly contribute to biological nitrogen cycling. Although the function of these genes is known to be influenced by environmental factors, there is limited research exploring the relationship between nitrogen transformation genes and environmental factors. Therefore, the correlations, between nitrogen transformation genes and environmental factors, were investigated at the estuaries of Chaohu lake (China) in different seasons. The results showed that the values of temperature, pH, organic compounds, nitrogen, and dissolved oxygen were higher in dry season, whereas the abundance of the genes was lower in dry season. In addition, the abundance of the anaerobic ammoxidation gene was much lower than the nitrification gene and denitrification gene. The results indicated that biological nitrification and denitrification were the primary mechanisms for nitrogen removal at estuaries in different seasons, and the reduction of nitric oxide may be a limiting step in the denitrification process. The Co-occurrence Network and Mantel test indicated that, during the dry season, the temperature was the primary driver of ammonification and nitrification functions, the NO3− and NO2− were the primary drivers of denitrification, and the total nitrogen (TN) and NH4+ were the main drivers of anaerobic ammonia oxidation. During the wet season, the dissolved oxygen was the primary driver of ammonification and nitrification functions, the chemical oxygen demand was the primary driver of denitrification, and the TN was the main driver of anaerobic ammonia oxidation. This study provides valuable insights into nitrogen cycling in surface water, contributing to a better understanding of this important process. © 2024 Elsevier Ltd

关键词： Genes

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Neurobehavioral Toxic Effects and Mechanisms of 2-Aminobenzothiazole Exposure on Zebrafish

SSRN

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SSRN 2023年

作者： Gu, Jie Guo, Liguo Chen, Chen Ji, Guixiang Wang, Lei Nanjing Institute of Environmental Sciences Ministry of Ecology and Environment Nanjing210042 China State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China

2-Aminobenzothiazole (NTH), a benzothiazole derivative, exhibits potent biochemical activities and plays a significant role in modern industry. Widespread and intensive utilization of NTH has led to its detection in aquatic environments, encompassing both groundwater and surface water. Despite its wide usage, the effect of NTH on developmental neurotoxicity in aquatic organisms remains uncharted. Therefore, the aim of this investigation was to create exposure models for short- and long-term studies in order to analyse the neurobehavioural toxic impact of NTH (0, 50, 500, and 5000 μg/L) on zebrafish, which includes motor function, anxiety, and memory performance, as well as to examine the mechanism of neurotoxicity. The results revealed a significant suppression of initial embryonic mobility by NTH. However, during short-term exposure experiments, it did not significantly impact the developmental neurobehavioral functions of zebrafish. In addition, significant effects on zebrafish were observed after long-term exposure to 50 and 500 μg/L NTH, mainly impacting locomotion, social behaviour, anxiety, and cognitive functions. Moreover, NTH caused oxidative damage in adult zebrafish brain tissue, which was accompanied by abnormal expression of oxidative damage-related genes. Furthermore, the Real-Time PCR results indicated a significant suppression of genes related to exposure to NTH, specifically those in the GABA synthesis pathway (gabrg2, gad2, gad1b, and abat) and the 5-HT synthesis pathway (tph2, tph1b, pet1, and htr1aa). Taken together, this study demonstrates for the first time that chronic exposure to NTH decreases the expression of genes associated with the zebrafish baramine synthesis pathway and the 5-hydroxytryptamine synthesis pathway. This suppression is accompanied by oxidative damage, ultimately resulting in neurobehavioural changes related to motor ability, anxiety, and memory performance. © 2023, The Authors. All rights reserved.

关键词： Aquatic organisms

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Biochar-supported nano-scale zerovalent iron activated persulfate for remediation of aromatic hydrocarbon-contaminated soil:an in-situ pilot-scale study

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Biochar 2022年第1期4卷 122-133页

作者： Yu Zeng Tai Li Yingzhi Ding Guodong Fang Xiaolei Wang Bo Ye Liqiang Ge Juan Gao Yujun Wang Dongmei Zhou Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil ScienceChinese Academy of SciencesNanjing 210008People’s Republic of China University of Chinese Academy of Sciences Beijing 100049People’s Republic of China School of Environmental and Safety Engineering Changzhou UniversityChangzhou 213164China School of Earth and Environment Anhui University of Science and TechnologyHuainan 232001People’s Republic of China Geological Survey of Jiangsu Province Nanjing 210018People’s Republic of China State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023People’s Republic of China

Biochar supported nano-scale zerovalent iron(nZVI/BC)for persulfate(PS)activation has been studied extensively for the degradation of pollutants on the lab scale,but it was rarely applied in practical soil remediation in the *** this research,we developed a facile ball-milling method for the mass production of nZVI/BC,which was successfully applied to activate persulfate for the remediation of organic polluted soil on an in-situ pilot ***-situ high-pressure injection device was developed to inject nZVI/BC suspension and PS solution into the soil with a depth of 0-70 *** removal efficiency of target pollutants such as 2-ethylnitrobenzene(ENB,1.47-1.56 mg/kg),biphenyl(BP,0.19-0.21 mg/kg),4-(methylsulfonyl)toluene(MST,0.32-0.43 mg/kg),and 4-phenylphenol(PP,1.70-2.46 mg/kg)at different soil depths was 99.7%,99.1%,99.9%and 99.7%,respectively,after 360 days of *** application of nZVI/BC significantly increased the degradation rates of contaminants by 11-322%,ascribed to its relatively higher efficiency of free radical generation than that of control *** addition,it was found that nZVI/BC-PS inhibited soil urease and sucrase enzyme activities by 1-61%within 55 days due to the oxidative stress for microbes induced by free radicals,while these inhibition effects disappeared with remediation time prolonged(>127 days).Our research provides a useful implementation case of remediation with nZVI/BC-PS activation and verifies its feasibility in practical contaminated soil remediation.

关键词： Persulfate Biochar Nanoscale zerovalent iron Pilot-scale Enzyme activities

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China Land Carbon Budget(CLCB1.0):a comprehensive estimate of the land carbon budget in China

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National Science Review 2025年第4期12卷 15-18页

作者： Jiangzhou Xia Xiaosheng Xia Xuhui Wang Weimin Ju Zhengyang Lin Zhangcai Qin Yuxing Sang Yanzi Yan Wenping Yuan Xu Yue Haicheng Zhang Hao Zhou Qiuan Zhu Tianjin Key Laboratory of Water Resources and Environment Tianjin Normal University School of Atmospheric Sciences Sun Yat-sen University Institute of Carbon Neutrality Sino-French Institute for Earth System ScienceCollege of Urban and Environmental SciencesPeking University International Institute for Earth System Sciences Nanjing University Jiangsu Center for Collaborative Innovation in Geographic Information Resource Development and Application School of Atmospheric Sciences Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies Key Laboratory of Tropical Atmosphere-Ocean System (Ministry of Education) Sun Yat-sen University Department of Soil and Environment Swedish University of Agricultural Sciences Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution Control Collaborative Innovation Center of Atmospheric Environment and Equipment Technology School of Environmental Science and Engineering Nanjing University of Information Science & Technology (NUIST) Carbon-Water Research Station in Karst Regions of Northern Guangdong School of Geography and Planning Sun Yat-sen University College of Meteorology and Oceanography National University of Defense Technology College of Geography and Remote Sensing Hohai University

The terrestrial ecosystem plays an important role in regulating the regional carbon balance, in particular for China, where ecological projects during past decades [1,2] have led to large increases in China's land carbon sinks, partially offsetting fossil fuel emissions. Therefore, accurate evaluation of land carbon fluxes in China is critical for improving our understanding of the magnitude of China's carbon budget, and projecting its future changes.

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