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Microbial functional heterogeneity induced in a petroleum-polluted soil profile

Journal of Hazardous Materials 2024年 465卷 133391页

作者： Zhang, Ruihuan Zhuang, Jugui Guo, Xue Dai, Tianjiao Ye, ZhenCheng Liu, Rongqin Li, Guanghe Yang, Yunfeng State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing 100084 China State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China School of Water Resources and Environment China University of Geosciences (Beijing) Beijing 100083 China Shanghai SUS Environment Remediation Co. LTD Shanghai 201703 China Institute of Environment and Ecology Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen 518055 China

Microbial taxonomic diversity declines with increasing stress caused by petroleum pollution. However, few studies have tested whether functional diversities vary similarly to taxonomic diversity along the stress gradient. Here, we investigated soil microbial communities in a petrochemically polluted site in China. Total petroleum hydrocarbon (TPH) concentrations were higher in the middle (2–3 m) and deep soil layer (3–5 m) than in the surface soil layer (0–2 m). Accordingly, microbial taxonomic α-diversity was decreased by 44% (p < 0.001) in the middle and deep soil layers, compared to the surface soil layer. In contrast, functional α-diversity decreased by 3% (p < 0.001), showing a much better buffering capacity to environmental stress. Differences in microbial taxonomic and functional β-diversities were enlarged in the middle and deep soil layers, extending the Anna Karenina Principle (AKP) that a community adapts to stressful environments in its own way. Consistent with the stress gradient hypothesis, we revealed a higher degree of network connectivity among microbial species and genes in the middle and deep soil layers compared to the surface soil layer. Together, we demonstrate that microbial functionality is more tolerant to stress than taxonomy, both of which were amenable to AKP and the stress gradient hypothesis. © 2023 Elsevier B.V.

关键词： Anna Karenina Principle Ecological network Petroleum hydrocarbon pollution Stress gradient hypothesis α- and β-diversity

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Comprehensive Assessment of Health and Ecological Risk of Cadmium in Agricultural Soils Across China: A Tiered Framework

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SSRN 2023年

作者： Huang, Xinhua Li, Xuzhi Zheng, Liping Zhang, Ya Sun, Li Feng, Yanhong Du, Junyang Lu, Xiaosong Wang, Guoqing State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control Nanjing Institute of Environmental Sciences Ministry of Ecology and Environment Nanjing210042 China College of Environment Science and Engineering Yangzhou University Yangzhou225127 China

Soil cadmium (Cd) contamination has been increasingly serious in agricultural land across China, posing unexpected risks to human health concerning crop safety and terrestrial ecosystems. This study collected Cd concentration data from 3388 soil sites in agricultural regions through reference retrieval and sampling survey. To assess the pollution status and Cd associated risks, a tiered framework was applied based on Accumulation index, deterministic method (Hazard quotient), and probabilistic assessment (Monte Carlo and Joint Probability Curve). The results revealed the widespread Cd enrichment in agricultural soils, mainly concentrated in Central, Southern, and Southwest China. Risk assessments demonstrated the greater risks related to crop safety, while the ecological risks posed by soil Cd were manageable. Notably, agricultural soils in southern regions of China exhibited more severe risks to both crop safety and soil ecosystem, compared to other agricultural regions. Furthermore, source analysis identified industrial emission as the primary contributor to Cd pollution and the associated risks. The study provides a theoretical basis for policymakers to prevent and manage Cd pollution in farmland soils of China. © 2023, The Authors. All rights reserved.

关键词： Cadmium

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Rapid oxidation of black phosphorus induced by copper ions via promoting oxygen bonding and phosphate desorption

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National Science Open 2024年第5期3卷 100-113页

作者： Zhiyu Zhu Sha Yang Kun Lu Shipeng Dong Xiaoyan Sun Jieyin Zheng Shixiang Gao Wei Liu Liang Mao State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentChemistry and Biomedicine Innovation CenterNanjing UniversityNanjing 210093China Nano Structural Materials Center School of Materials Science and EngineeringNanjing University of Science and TechnologyNanjing 210094China School of Environmental Science and Engineering Zhejiang Gongshang UniversityHangzhou 310018China Nanjing Qixia District Hospital Nanjing 210046China Cambridge A-Level Centre Nanjing Jinling High SchoolNanjing 210005China

Black phosphorus(BP)has garnered significant interest in the field of biomedicine because of its exceptional *** oxidation product of BP phosphate has been utilized in numerous studies for the purpose of repairing bone defects and inducing apoptosis and autophagy in cancer ***,this process has drawbacks in terms of low yield and a slow rate of phosphate *** this study,we found that the oxidation rate of BP was increased 120-fold and the yield proportion of phosphate BP product was increased from 30%to 85%with the presence of less than 0.1%copper ions(Cu^(2+))in the reaction *** enhancement was attributed to the fact that the presence of Cu^(2+)promoted the bonding of oxygen on the BP surface and then the desorption of phosphate molecules from the BP *** study offers a novel perspective on the process of BP oxidation and introduces innovative concepts for the development of biological drug delivery systems capable of rapid decomposition.

关键词： black phosphorus reaction pathway reaction efficiency copper ions reaction mechanism

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Oxygen Vacancies-Dominated Reactive Species Generation from Peroxymonosulfate Activated by Moo3-X for Pollutant Degradation

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SSRN 2023年

作者： Wang, Xiaolei Liu, Xiantang Tong, Yunping Liu, Cun Ding, Yingzhi Gao, Juan Fang, Guodong Zha, Xianghao Wang, Yujun Zhou, Dongmei College of Chemistry and Environmental Science Kashi University Kashi844000 China Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil Science Chinese Academy of Sciences Nanjing210008 China State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China University of Chinese Academy of Sciences Beijing100049 China

Interface oxygen vacancies (OVs) are commonly used to improve the catalytic performance of activators in persulfate-based advanced oxidation processes, but the underlying mechanism was not fully explored. This work reports a facile heat treatment method to regulate OVs in MoO3-x to elucidate the mechanism of peroxymonosulfate (PMS) activated by OVs to degrade organic pollutants. Electron spin resonance, free radical quenching, X-ray photoelectron spectroscopy, and Raman spectroscopy confirmed that both reducing Mo species and OVs of MoO3-x surface were responsible for PMS activation. Further experiments and Density Function Theory (DFT) calculation suggest that OVs in MoO3-x induced the formation of superoxide radical (O2•−), and then O2•− was transformed into singlet oxygen (1O2) or mediated PMS activation to generate radicals, which contritbued to 70.2% of PCB28 degradation. The steady-state concentrations of free radicals calculated with the kinetics model show that OVs were more favorable to mediate PMS to generate hydroxyl radicals (•OH) under oxic conditions, while reducing Mo species would like to induce PMS to produce sulfate radicals (SO4•−). Overall, this study is dedicated to a new insight into the in-depth mechanism of PMS activation by OVs-rich catalysts and provides a novel strategy for reactive species regulation in PMS based oxidation process. © 2023, The Authors. All rights reserved.

关键词： Oxygen vacancies

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Evidence of sewage discharge on the coalescence mechanism of aquatic microbial communities during high amplitude hydrological periods

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Science of the Total environment 2025年 959卷 178223页

作者： Kou, Xin Huang, Shier Bian, Rui Tang, Qingwen Wang, Hui Liu, Song Wang, Li Qi, Weixiao Cao, Xiaofeng Lan, Huachun Liu, Huijuan Qu, Jiuhui Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China Center for Ecological Civilization Tsinghua University Beijing100084 China Center of Tsinghua Think Tanks Tsinghua University Beijing100084 China School of Environment Northeast Normal University Changchun130117 China Co. Ltd. Zunyi564501 China Chishui River Middle Basin Watershed ecosystem Observation and Research Station of Guizhou Province Zunyi564501 China

Microbial community coalescence is a ubiquitous ecological process in various ecosystems. However, limited research has addressed the effects of the coalescence on microbial ecological processes and network structure, particularly in the context of sewage discharge during high amplitude hydrological periods. Employing 16S rRNA sequencing and species source tracking analysis, we investigated the coalescence pattern of bacterioplankton in the Chishui river and sewage across various hydrological periods. The results demonstrated that the downstream bacterioplankton mainly originated from the upstream water body, and the sewage discharge from the wastewater treatment plants (WWTPs) had less impact on the downstream bacterioplankton. In the low-water period, the bacterioplankton community showed significant coalescence, and the specialist species and functional taxa gathered in the downstream. Bacterioplankton displayed distinct ecological succession patterns after community coalescence, with notable variations in the abundance of dominant group. Bacterioplankton community assembly was dominated by stochastic processes in river and the sewage over different hydrological periods. The ecological networks exhibited the highest complexity in the high-water period, whereas their stability was most pronounced in the low-water period. Species diversity, as opposed to functional and phylogenetic diversity, might be a more accurate indicator to predict changes in microbial network structure. Our findings will provide new perspectives on the mechanisms of aquatic microbial community coalescence in natural environments. © 2024 Elsevier B.V.

关键词： Anthropogenic

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Facile Green Preparation of Single- and Two-Component Modified Activated Carbon Fibers for Efficient Trace Heavy Metals Removal from Drinking Water

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SSRN 2022年

作者： Zuo, Qi Zheng, Hong Zhang, Pengyi Zhang, Yu Zhang, Jiejing Zhang, Baichao Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid Wastes National Laboratory of Mineral Materials School of Materials Science and Technology China University of Geosciences Beijing100083 China State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China

Trace heavy metals exist in drinking water, having great adverse effects on human health and making it a huge challenge to remove. Herein, novel materials have been prepared by a simple and green method using single- (polydopamine (PDA) or 2,3-dimercaptopropanesulfonic sodium (DMPS)) (PDA-OACF or DMPS-OACF) and two-component (PDA and DMPS) (DMPS-PDA-OACF) functionalized activated carbon fibers pretreated by hydrogen peroxide for the removal of trace heavy metals. The as-prepared DMPS-OACF (7.5,20) under DMPS addition of 7.5 mg and sonication time of 20 min retained large specific surface area, micro-mesoporous structure and rich functional groups and showed better adsorption performance for trace lead and mercury. It also exhibited wide applicable ranges of pH (3.50-10.50) and concentration (50-1136 ppb), rapid adsorption kinetics, and excellently selective removal performance for trace lead. The maximum lead adsorption capacity reached 16.03 mg/g when the effluent lead concentration met World Health Organization (WHO) standard and the adsorbent can be regenerated by EDTA solution. The fitting results of adsorption kinetics and isotherm models revealed that the lead adsorption process was multi-site adsorption on heterogeneous surfaces and chemical adsorption. The excellent adsorption properties for trace heavy metals were attributed that the sulfur/oxygen/nitrogen-containing functional groups boosted diffusion and adsorption by electrostatic attraction and coordination, suggesting that DMPS-OACF (7.5,20) has great application potential in the removal of trace heavy metals. © 2022, The Authors. All rights reserved.

关键词： Adsorption

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Waste sludge disintegration, methanogenesis and final disposal via various pretreatments: Comparison of performance and effectiveness

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environmental Science and Ecotechnology 2021年第4期8卷 119-129页

作者： Haiyang He Xiaodong Xin Wei Qiu Dong Li Zhicen Liu Jun Ma State Key Laboratory of Urban Water Resource and Environment School of EnvironmentHarbin Institute of TechnologyHarbin150090China Department of Environmental Science and Engineering Huaqiao UniversityXiamen361021China Collaborative Innovation Center of Atmospheric Environment and Equipment Technology Jiangsu Key Laboratory of Atmospheric Environment Monitoring and Pollution ControlSchool of Environmental Science and EngineeringNanjing University of Information Science&TechnologyNanjing210044China School of Geosciences The University of EdinburghEdinburghEH89JUUK

This study compared the three wastewater pretreatments of ozonation,Fe2þ-S2O82and freeze-thawing(F/T)in the disintegration,anaerobic digestion(AD)and final disposal of the *** F/T pretreatment increased the dewaterability and settleability of the sludge by 7.8%and 47.1%,*** ozonation pretreatment formed more volatile fatty acids(VFAs),with a peak value of 320.82 mg SCOD/L and controlled the release of *** Fe2þ-S2O82pretreatment removed heavy metals through the absorption and flocculation of ferric particles formed *** the anaerobic digestion of the sludge,the ozonation pretreatment accelerated the hydrolysis rate(k)rather than the biochemical methane potential(B0)of the sludge due to the high VFA content in the ***,the F/T pretreatment facilitated the B0 with great economic efficiency by enhancing the solubilisation of the *** Fe2þ-S2O82pretreatment decreased the methane production,the ferric particle was a unique advantage in the disintegration and harmless disposal of the *** digested sludge had more VFAs after ozonation pretreatment,which contributed to the recycling of *** addition,the lower sludge volume could save the expense of transportation and disposal by ozonation *** pretreatments had different *** comparative study provided information allowing the selection of the type of pretreatment to achieve different objectives of the treatment and disposal of sludge.

关键词： Sludge disintegration Anaerobic sludge digestion Effectiveness comparison Different pretreatments

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High-Performance Iron-Doped Molybdenum Disulfide Photocatalysts Enhance Peroxymonosulfate Activation for Water Decontamination

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SSRN 2022年

作者： Li, Zhongxu Dong, Shuangshi Sun, Meng Ministry of Education Jilin University Jilin Changchun130021 China Jilin Provincial Key Laboratory of Water Resources and Environment Jilin University Jilin Changchun130021 China Center for Water and Ecology State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China

Although Fe-based catalysts for peroxymonosulfate (PMS) activation for environmental remediation are effective, the poor regeneration of ferric (Fe (III)) to ferrous ions (Fe (II)) in conventional Fe-based catalysts compromises the durability of PMS activation. Given this, an iron-doped molybdenum disulfide MoS2 (Fe-MoS2) catalyst was prepared via a one-step hydrothermal method, and it was demonstrated to sustain PMS activation for removing tetracycline hydrochloride (TCH) from aqueous solution under visible-light irradiation. The as-prepared Fe-MoS2 catalysts feature dual metallic active sites of Fe and Mo atoms to enhance photoelectrons production from MoS2 for Fe (II) regeneration, thereby preventing iron leakage. Moreover, the Fe-MoS2 catalysts exhibited good recyclability, enabling multiple cycles of TCH degradation in the presence of PMS under the irradiation of visible-light. In addition, we confirmed that the generated radicals (SO4•−, O2•−, and •OH) and non-radical species (1O2 and h+) were responsible for TCH degradation. We also determined critical intermediates during TCH degradation and proposed TCH degradation pathways. This study develops a high-performance Fe-doped MoS2 photocatalyst for PMS activation and paves the way for leveraging dual metallic sites on catalysts for enhancing water purification. © 2022, The Authors. All rights reserved.

关键词： Molybdenum compounds

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Cattle manure biochar and earthworm interactively affected C02 and N20 emissions in agricultural and forest soils:Observation of a distinct difference

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环境科学与工程前沿 2022年第3期16卷 141-153页

作者： Xiaoqiang Gong Jinbiao Li Scott X.Chang Qian Wu Zhengfeng An Chengpeng Huang Xiangyang Sun Suyan Li Hui Wang Department of Renewable Resources University of AlbertaEdmontonAlberta T6G 2E3Canada College of Forestry Beijing Forestry UniversityBeijing 100083China State Key Joint Laboratory of Environmental Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China Department of Renewable Resources University of AlbertaEdmontonAlberta T6G 2E3Canada Co-Innovation Center for Sustainable Forestry in Southern China Nanjing Forestry UniversityNanjing 210037China Department of Renewable Resources University of AlbertaEdmontonAlberta T6G 2E3Canada Key Laboratory of Grassland Resources of the Ministry of Education and Key Laboratory of Forage Cultivation Processing and High Efficient Utilization of the Ministry of AgricultureCollege of GrasslandResources and EnvironmentInner Mongolia Agricultural UniversityHohhot 010011China State Key Laboratory of Subtropical Silviculture Zhejiang A&F UniversityLin'an 311300China College of Forestry Beijing Forestry UniversityBeijing 100083China State Key Joint Laboratory of Environmental Simulation and Pollution Control School of EnvironmentTsinghua UniversityBeijing 100084China

The application of manure-derived biochar offers an alternative to avoid the direct application of manure to soil causing greenhouse gas *** fauna,especially earthworms,can markedly stimulate carbon dioxide(CO2)and nitrous oxide(N2O)emissions from *** study therefore investigated the effect of cattle manure biochar(added at rates of 0,2％,or 10％,coded as BC0,BC2 and BC10,respectively)application,with or without earthworm Aporrectodea turgida,on emissions of CO2 and N2O and changes of physic-chemical properties of agricultural and forest soils in a laboratory incubation *** BC10 treatment significantly enhanced cumulative CO2 emissions by 27.9％relative to the untreated control in the agricultural *** the contrary,the BC2 and BC10 treatments significantly reduced cumulative CO2 emissions by 16.3％-61.1％and N2O emissions by 92.9％-95.1％compared to the untreated control in the forest *** addition of earthworm alone significantly enhanced the cumulative CO2 and N2O fluxes in agricultural and forest *** CO2 and N2O fluxes were significantly increased when BC2 and BC10 were applied with earthworm in the agricultural soil,but were significantly reduced when BC10 was applied with earthworm in the forest *** study demonstrated that biochar application interacted with earthworm to affect CO2 and N2O emissions,which were also dependent on the soil type *** study suggests that manure biochar application rate and use of earthworm need to be carefully studied for specific soil types to maximize the climate change mitigation potential of such management practices.

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Molecular Insight into the Allocation of Organic Carbon to Heterotrophic Bacteria: Carbon Metabolism and the Involvement in Nitrogen and Phosphorus Removal

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SSRN 2024年

作者： Sui, Qianwen Di, Fei Zhong, Hui Chen, Meixue Wei, Yuansong State Key Joint Laboratory of Environmental Simulation and Pollution Control Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing100085 China Department of Water Pollution Control Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing100085 China University of Chinese Academy of Sciences Beijing100049 China South China University of Technology China

Carbon metabolism and nutrient removal are crucial for biological wastewater treatment. This study focuses on analyzing carbon allocation and utilization by heterotrophic bacteria in response to increasing COD concentration in the influent. The study also assesses the effect of denitrification and biological phosphorus removal, particularly in combination with anaerobic ammonia oxidation (anammox). The experiment was conducted in a SBR operating under anaerobic/anoxic/oxic conditions. As the acetate concentration in the influent increased, intracellular COD accounted for 95.72% of the COD removed. By regulating the NO3- concentration in the anoxic stage, the nitrite accumulation rate reached 69.46%, which could serve as an electron acceptor for anammox. Most genes related to the tricarboxylic acid (TCA) cycle declined, while the genes involved in the glyoxylate cycle, gluconeogenesis, PHA synthesis increased. This suggests that glycogen accumulation and carbon storage, rather than direct carbon oxidation, was the dominant pathway for carbon metabolism. However, the genes responsible for the reduction of NO2-N (nirK) and NO (nosB) decreased, contributing to NO2- accumulation. The study also employed metagenomic analysis to reveal microbial interactions. The enrichment of specific bacterial species, including Dechloromonas sp. (***.10), Ca. Competibacteraceae bacterium (***.8), Ca. Desulfobacillus denitrificans (***.17), and Ignavibacteriae bacterium (***.9), played a collaborative role in facilitating nutrient removal and promoting the combination with anammox. © 2024, The Authors. All rights reserved.

关键词： Denitrification

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