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Biodegradation of polycyclic aromatic hydrocarbons enhanced by a newly isolated Acinetobacter sp. YY-1 and exogenous quorum sensing signaling molecule N-acyl-homoserine lactones

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Bioresource Technology 2025年 433卷 132718页

作者： Huang, Zhixiong Yu, Xiaolong Ma, Yunjie Wang, Jianqiao Zheng, Yan State Key Laboratory of Soil Pollution Control and Safety School of Environmental Science and Engineering Southern University of Science and Technology Shenzhen518055 China Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control School of Environmental Science and Engineering Southern University of Science and Technology Shenzhen518055 China College of Environment and Resource Xiangtan University Xiangtan411105 China Key Laboratory for Water Quality and Conservation of the Pearl River Delta Ministry of Education School of Environmental Science and Engineering Guangzhou University Guangzhou510006 China

Remediation of persistent organic pollutants like polycyclic aromatic hydrocarbons (PAHs) remains a great challenge, but biodegradation offers the best hope. Enhancing bacterial activity is crucial for successful microbe-based remediation. Quorum sensing (QS), a microbial communication mechanism, enables synchronized metabolic activities that may facilitate the adaptation of microbial communities to PAHs-contaminated environments. Its role in degrading two PAHs compounds, phenanthrene and pyrene, is investigated here. Acinetobacter sp. YY-1, newly isolated from activated sludge here, was found to be a QS-regulated PAHs degrader with high PAHs tolerance, maintaining stable bioactivity in the presence of 50–400 mg/L phenanthrene. Genomic analysis of YY-1 identified N-acyl-homoserine lactones (AHLs) synthase and receptor genes, with 2.4% of genes linked to aromatic compound degradation. PAHs degradation experiment showed that, with the addition of 40 μmol/L exogenous mixed AHLs, YY-1′s phenanthrene (100 mg/L) removal rose from 28.4% to 43.7% in 7 days, while pyrene (20 mg/L) removal increased from 13.4% to 36.8% in 7 days;QS inhibitors reduced the phenanthrene degradation to 16%. Metabolomics analysis of phenanthrene biodegradation metabolites suggested that exogenous AHLs likely increased the hydrophobicity of YY-1′s membrane and stress resistance, thereby enhancing PAHs biodegradation. Through establishing a linkage between QS regulation and the enhancement of PAHs biodegradation, this study offers insights into utilizing QS-mediated biodegraders for enhanced removal of xenobiotic organic pollutants. © 2025

关键词： Pyrene

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基于纳米金/介孔NiO/泡沫镍纳米复合材料的微型电极用于地下水重金属检测（英文）

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Engineering 2023年第8期 199-208页

作者： Boyuan Xue Qian Yang Kaidong Xia Zhihong Li George Y.Chen Dayi Zhang Xiaohong Zhou State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University National Key Laboratory of Science and Technology on Micro/Nano Fabrication Institute of Microelectronics Peking University Shenzhen Key Laboratory of Photonic Devices and Sensing Systems for Internet of Things Guangdong and Hong Kong Joint Research Centre for Optical Fiber SensorsShenzhen University College of New Energy and Environment Jilin University The Research Institute of Environmental Innovation (Suzhou) Tsinghua University

Heavy metals, notably Pb2+and Cu2+, are some of the most persistent contaminants found in groundwater. Frequent monitoring of these metals, which relies on efficient, sensitive, cost-effective, and reliable methods, is a necessity. We present a nanocomposite-based miniaturized electrode for the concurrent measurement of Pb2+and Cu2+by exploiting the electroanalytical technique of square wave *** also propose a facile in situ hydrothermal calcination method to directly grow binder-free mesoporous Ni O on a three-dimensional nickel foam, which is then electrochemically seeded with gold nanoparticles（Au NPs）. The meticulous design of a low-barrier Ohmic contact between mesoporous Ni O and Au NPs facilitates target-mediated nanochannel-confined electron transfer within mesoporous Ni O. As a result, the heavy metals Pb2+(0.020 mg.L-1detection limit; 2.0–16.0 mg.L-1detection range)and Cu2+(0.013 mg.L-1detection limit; 0.4–12.8 mg.L-1detection range) can be detected simultaneously with high precision. Furthermore, other heavy metal ions and common interfering ions found in groundwater showed negligible impacts on the electrode's performance, and the recovery rate of groundwater samples varied between 96.3% ± 2.1% and 109.4% ± 0.6%. The compactness, flexible shape, low power consumption, and ability to remotely operate our electrode pave the way for onsite detection of heavy metals in groundwater, thereby demonstrating the potential to revolutionize the field of environmental monitoring.

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Significant enhancement in water resistance of Pd/Al2O3 catalyst for benzene oxidation by Na addition

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Chinese Chemical Letters 2019年第7期30卷 1450-1454页

作者： Shunyu Kang Meng Wang Na Zhu Chunying Wang Hua Deng Hong He Center for Excellence in Regional Atmospheric Environment Key Laboratory of Urban Pollutant Conversion Institute of Urban Environment Chinese Academy of Sciences Xiamen 361021 China University of Chinese Academy of Sciences Beijing 100049 China State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing 100085 China

A series of Na-doped 1 wt% Pd/Al2O3 catalysts with different Na loadings were prepared by wet impregnation and tested for the catalytic oxidation of benzene. Suitable addition of Na had a remarkable promotion effect on water resistance and enhancement of low temperature activity of Pd/Al2O3 catalysts. The optimal mole ratio between Na and Pd was 1:1. The properties of the prepared catalysts were characterized by X-ray diffraction (XRD), Brunauer Emmett Teller (BET), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), O2-temperature-programmed desorption (O2-TPD), and in situ DRIFTS. Results indicated that the addition of Na not only decreased the content of adsorbed water species but also increased the amount of liable surface oxygen species, which are likely the key factors for the excellent water resistance of the catalyst. Na addition also improved the mobility of the lattice oxygen species, which was favorable for catalytic activity. Moreover, the well-dispersed negatively charged Pd particles and suitable redox properties derived from Na addition also contributed to the improved performance and water resistance of the Na1Pd1/Al2O3 catalyst. In situ DRIFTS results revealed that benzene was oxidized to maleate and acetate species via intermediate o-benzoquinone species, which finally turned into harmless CO2 and H2O.

关键词： Sodium addition Pd/Al2O3 Benzene Water resistance Catalytic oxidation

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Probabilistic ecological risk characterizing and source-specific risk apportionment of antibiotics in rivers in the sub-center of Beijing, China

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Journal of environmental Sciences 2025年

作者： Cong Men Yuting Ma Haoquan Jiang Haoxiang Tao Zifu Li Jiane Zuo School of Energy and Environmental Engineering Beijing Key Laboratory of Resource-Oriented Treatment of Industrial Pollutants University of Science and Technology Beijing Beijing 100083 China State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing 100084 China State Key Laboratory of Iron and Steel Industry Environmental Protection Central Research Institute of Building and Construction Co. Ltd. MCC Group Beijing 100088 China China Securities Co. Ltd. Beijing 100020 China Institute of Environment and Ecology Tsinghua Shenzhen International Graduate School Shenzhen 518055 China

The widespread occurrence of antibiotics in urban rivers has raised global concerns for ecological security. Quantitative source-specific risk apportionment of antibiotics is crucial for targeted and effective ecological risk management, but is rarely studied. In this study, a source-specific ecological risk apportionment model for antibiotics was developed by combining the ecological risk quotient (RQ) method and the positive matrix factorization (PMF) model. Based on twenty-two antibiotics in sixty-five water samples from thirteen sites in Beijing in wet and dry seasons, the spatial variation and probabilistic distribution of ecological risk associated with antibiotics were analyzed, and source-specific ecological risk was evaluated. Results showed that for the sum of all antibiotics, the mean concentration of all samples was 671.48 ng/L, and the lower limit of the 90 % confidence interval of RQs was more than ten times the threshold for the high-risk level. The main sources were identified as domestic sewage, pharmaceutical wastewater and livestock discharge. It should be noted that higher contributions to antibiotic concentrations from sources do not always result in higher levels of ecological risk. Domestic sewage and livestock discharge contributed roughly equivalent amounts (36.17 % and 37.59 %, respectively) to antibiotic concentrations. However, domestic sewage was the most dominant source for risk (63.30 %), and livestock discharge only contributed 7.37 % to risk. The study found that evaluating the source-specific ecological risk associated with antibiotics is essential in addition to identifying their sources. The source-specific ecological risk apportionment model developed in this study is also referential for related studies.

关键词： Antibiotics Urban river Ecological risk assessment Spatial distribution Source apportionment

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Fluorescence Characteristics and Source Analysis of DOM in CKDu Zone of the North Central Province in Sri Lanka in Wet Season

SSRN

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SSRN 2022年

作者： Hu, Dazhou Indika, Suresh Zhong, Hui Weragoda, Sujithra K. Jinadasa, K.B.S.N. Weerasooriya, Rohan Wei, Yuansong State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing100085 China Laboratory of Water Pollution Control Technology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing100085 China University of Chinese Academy of Sciences Beijing100049 China National Water Supply and Drainage Board Katugastota 20800 Sri Lanka Department of Civil Engineering Faculty of Engineering University of Peradeniya Peradeniya20400 Sri Lanka National Institute of Fundamental Studies Hantana Rd Kandy20000 Sri Lanka

Dissolved organic matter (DOM) should be purified for providing safe groundwater-based drinking water. Current research on groundwater in the chronic kidney disease of unknown etiology (CKDu) zone of the North Central Province (NCP) in Sri Lanka has focused mainly on groundwater aquatic chemistry, with limited attention paid to the spatial distribution, compositional sources and factors of DOM in groundwater. Therefore, two kind of groundwater samples from dug well and tube well in the NCP during the wet season were collected, and the structure, composition, source and spatial distribution characteristics of the DOM of these two groundwater types were determined, compared and analyzed by such analytical tools as parallel factor analysis (PARAFAC). Results show that the average concentrations of TOC in the groundwater of the two aquifers are generally greater than 5.0mg/l. The concentration of TOC in the groundwater of the shallow weathered aquifer is higher than that of the deep hard rock aquifer, while its distribution of the two aquifers are on contrary. The DOM in groundwater of shallow weathered aquifer has three types and four components, including humus like component C1(33.36%) and C2(38.60%), protein like component C3(13.09%) and heterogeneous organic component C4(14.95 %). In the deep hard rock aquifer, two types and two components are determined, including humus like component CⅠ(69.80%) widely existing in natural water and soluble microbial by-product CⅡ(30.20%) produced by microbial community activities. In the groundwater of shallow weathered aquifer, DOM is mainly exogenous input, the higher ion concentration in water affected the fluorescence intensity of humus and protein components. In the groundwater of deep hard rock aquifer, DOM has obvious endogenous characteristics, and higher pH value may inhibit the production of protein like fluorescent substances to a certain extent. © 2022, The Authors. All rights reserved.

关键词： Aquifers

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Asymmetrical Cu-O-Pr electron bridge induced by d-p-f gradient orbital hybridization for robust C2+ production in CO2 electroreduction

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Applied Catalysis B: environmental 2025年 378卷

作者： Chen, Xiaoping Mi, Jinxing Wu, Peng Huang, Hao Wang, Meng Chen, Jianjun Guo, Yanbing Li, Junhua State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing 100084 China Institute of Environmental and Applied Chemistry College of Chemistry Central China Normal University Wuhan 430079 China School of Environmental Science and Engineering Huazhong University of Science and Technology Wuhan 430074 China

One challenge confronting Cu-based catalysts in the electrocatalysis of carbon dioxide reduction reaction (CO2 RR) is the inevitable reduction to metallic Cu and uncontrollable structural collapse, resulting in low selectivity and rapid deactivation. In this work, we established a distinct and robust Cu-O-Pr electron bridge interface based on Cu 3d-O 2p -Pr 4 f gradient orbital coupling, which enabled effective stability for the reduction of CO2 to C2+ products. The effective gradient 3d-2p-4f orbital coupling precisely regulates the electron distribution of interfacial structures, while optimizing the electronic structure of Cu 3d states, and effective stabilization of the Cu⁺ -Cu⁰ asymmetric active sites. The unique interfacial Cu active sites exhibit exceptional electrochemical durability, maintaining a 72 % C2+ products Faradaic efficiency at a potential of −1.05 V (vs RHE) over an extended 120-hour testing period. In-situ experiments and theoretical calculations highlight that the Cu-O-Pr interface improved the coverage of localized *CO intermediates, and lowered the energy barrier for the C-C coupling to the C2+ product. Furthermore, *CO-*CO dimerization is preferred over *CO-*CHO coupling at the Cu-O-Pr interfacial active sites. This work offers valuable insights that inform the strategic design of Cu-based catalysts for the targeted electroreduction of CO2 to C2+ products.

关键词： CO2 Electroreduction CO2 utilization Cu-based Catalysts Orbital hybridization Rare-earth elements

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Identifying Direct Anchoring Sites of Ag on Tio2 to Design Highly Active Nh3-Sco Catalysts

SSRN

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SSRN 2023年

作者： Wang, Chunxue Li, Yuan Meng, Caixia Ma, Yixing Sun, Xin Li, Kai Ning, Ping Wang, Fei He, Hong Faculty of Environmental Science and Engineering Kunming University of Science and Technology Kunming650500 China National-Regional Engineering Center for Recovery of Waste Gases from Metallurgical and Chemical Industries Kunming650500 China State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental Sciences Chinese Academy of Sciences Beijing100085 China University of Chinese Academy of Sciences Beijing100049 China Division of Energy Research Resources Dalian National Laboratory for Clean Energy Dalian Institute of Chemical Physics Chinese Academy of Sciences Liaoning Dalian116023 China

The efficacy of NH3-selective catalytic oxidation (NH3-SCO) over Ag/TiO2 catalysts is greatly influenced by Ag species, which is largely dependent on the anchoring sites over TiO2. Despite efforts to identify the direct anchoring site of metal atoms on TiO2, conflicting views persist. In this study, we synthesized Ag/TiO2-X catalysts with varying hydroxyl (OH) group and defect contents on TiO2-X. Surprisingly, we discovered that OH groups on TiO2 are the direct anchoring sites of Ag, but not significantly related to defects. Through thermal treatment, we modulated the OH group content on TiO2 and observed that suitable sizes of metallic Ag nanoparticles (Ag0 NPs) formed on TiO2-800 exhibited superior NH3-SCO activity and were more conducive to the activation of O2 and dehydrogenation of NH3. Our findings provide novel insights for designing efficient NH3-SCO catalysts, and the use of OH groups as direct anchoring sites could be extended to other metals and supports. © 2023, The Authors. All rights reserved.

关键词： Titanium dioxide

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Application of multi-angle spaceborne observations in characterizing the long-term particulate organic carbon pollution in China

Research Square

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Research Square 2023年 rs3rs-3734829页

作者： Hang, Yun Pu, Qiang Zhu, Qiao Meng, Xia Jin, Zhihao Liang, Fengchao Tian, Hezhong Li, Tiantian Wang, Tijian Cao, Junji Fu, Qingyan Dey, Sagnik Li, Shenshen Huang, Kan Kan, Haidong Shi, Xiaoming Liu, Yang Gangarosa Department of Environmental Health Rollins School of Public Health Emory University AtlantaGA30322 United States Department of Environmental and Occupational Health Sciences School of Public Health University of Texas Health Science Center at Houston HoustonTX77030 United States School of Public Health Fudan University Shanghai200032 China School of Public Health and Emergency Management Southern University of Science and Technology Shenzhen518055 China State Key Laboratory of Environmental Simulation and Pollution Control School of Environment Beijing Normal University Beijing100875 China China CDC Key Laboratory of Environment and Population Health National Institute of Environmental Health Chinese Center for Disease Control and Prevention Beijing100021 China School of Atmospheric Sciences Nanjing University Nanjing210023 China Institute of Atmospheric Physics Chinese Academy of Sciences Beijing100101 China State Ecologic Environmental Scientific Observation and Research Station at Dianshan Lake Shanghai Environmental Monitoring Center Shanghai200235 China Centre for Atmospheric Sciences Indian Institute of Technology Delhi Hauz Khas New Delhi110016 India State Key Laboratory of Remote Sensing Science Aerospace Information Research Institute Chinese Academy of Sciences Beijing100101 China Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention Department of Environmental Science and Engineering Fudan University Shanghai200433 China

Ambient PM2.5 pollution is recognized as a leading environmental risk factor, causing significant mortality and morbidity in China. However, the specific contributions of individual PM2.5 constituents remain unclear, primarily due to the lack of a comprehensive ground monitoring network for constituents. This issue is particularly critical for carbonaceous species such as organic carbon (OC) and elemental carbon (EC), which are known for their significant health impacts, and understanding the OC/EC ratio is crucial for identifying pollution sources. To address this, we developed a Super Learner model integrating Multi-angle Imaging SpectroRadiometer (MISR) retrievals to predict daily OC concentrations across China from 2003 to 2019 at a 10-km spatial resolution. Our model demonstrates robust predictive accuracy, as evidenced by a random cross-validation R2 of 0.84 and an RMSE of 4.9 μg/m3, at the daily level. Although MISR is a polar-orbiting instrument, its fractional aerosol data make a significant contribution to the OC exposure model. We then use the model to explore the spatiotemporal distributions of OC and further calculate the EC/OC ratio in China. We compared regional pollution discrepancies and source contributions of carbonaceous pollution over three selected regions: Beijing-Tianjin-Hebei, Fenwei Plain, and Yunnan Province. Our model observes that OC levels are elevated in Northern China due to industrial operations and central heating during the heating season, while in Yunnan, OC pollution is mainly contributed by local forest fires during fire seasons. Additionally, we found that OC pollution in China is likely influenced by climate phenomena such as the El Niño-Southern Oscillation. Considering that climate change is increasing the severity of OC concentrations with more frequent fire events, and its influence on OC formation and dispersion, we suggest emphasizing the role of climate change in future OC pollution control policies. We believe this stu

关键词： Remote sensing

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Occurrence and Health Risk Assessment of Triazine Herbicides in Tap Water and Barreled Water in Urban and Suburban Areas of the Yangtze River Delta, China

SSRN

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SSRN 2022年

作者： Wang, Rui Zhang, Shengwei Zhu, Jincai Xiao, Kaiyan Wang, Feng Xu, Zhicheng Zheng, Hongyuan Cai, MingHong Ministry of Natural Resources Key Laboratory for Polar Science Polar Research Institute of China 451 Jinqiao Road Shanghai200136 China State Key Laboratory of Water Environment Simulation School of Environment Beijing Normal University Beijing100875 China School of Oceanography Shanghai Jiao Tong University 1954 Huashan Road Shanghai200030 China Department of Municipal and Environmental Engineering School of Civil Engineering Beijing Jiaotong University Beijing100044 China State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai200092 China Shanghai Ocean University China

Triazine herbicides are known to be toxic to humans and aquatic organisms. However, current research on triazine herbicides in water has focused on one commonly used chemical, namely atrazine, and largely ignores the potential risks of others, especially for drinking water intake. In this study, we tested for thirteen triazine herbicides in the drinking water of the Yangtze River Delta region by using the high-throughput organic analysis testing combined with high volume solid-phase extraction (Hi-throat/Hi-Volume SPE) technique. We found that that the eleven target triazine herbicides were detected in tap water (TW), and Σ11triazine herbicides ranged between 0.331-25.4 ng/L (mean: 5.29 ± 6.1 ng/L). The highest percentage in TW was terbutryn, which was different from atrazine dominating in other media. Nine triazine herbicides were detected in barreled water (BW), with Σtriazine herbicides in the range of 0.951 -2.37 ng/L (mean 1.67 ± 0.538 ng/L), most triazine herbicides concentrations were higher in TW than in BW. The quality of the water source has a significant influence on the distribution of triazine herbicides in BW. Furthermore, deep treatment reduced the content of some pesticide residues. The difference in herbicide species in drinking water was influenced by both the water treatment process and the source water. The total concentration of triazine herbicides in TW of most urban areas was higher than that in suburban areas. Triazine herbicides were ingested more through TW with an estimated daily intake (EDI) of 3–4 times higher (range 0.018–0.05 ng/kg-bw/d) than through BW (range 0.006–0.016 ng/kg-bw/d), indicating that the acute toxicities of the two groups of drinking water samples were negligible. This study provides the first overview of the occurrence, regional distribution characteristics, and associated potential human health risks of triazine herbicides in drinking water in China. © 2022, The Authors. All rights reserved.

关键词： Herbicides

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Chemical Characteristics of Air pollution with Significant Emission Changes During 2019-2021 in a Typical Industrial City of Eastern China

SSRN

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SSRN 2023年

作者： Huang, Xiangpeng Li, Changping Pan, Chao Li, Yue'e Zheng, Wei Lin, Guangwu Li, Haiwei Zhang, Yunjiang Wang, Junfeng Lei, Yali Ge, Xinlei Ye, Jianhuai Zhang, Hongliang Department of Environmental Science and Engineering Shanghai Key Laboratory of Atmospheric Particle Pollution and Prevention Fudan University Shanghai200438 China 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 and Technology Nanjing210044 China School of Environmental Science and Engineering Southern University of Science and Technology Shenzhen518055 China Suzhou Environmental Monitoring Center Suzhou215011 China China Energy Science and Technology Research Institute Co. Ltd. Nanjing210023 China Key Lab of Geographic Information Science of The Ministry of Education School of Geographic Sciences East China Normal University Shanghai200241 China Shanghai200062 China IRDR ICoE on Risk Interconnectivity and Governance on Weather Climate Extremes Impact and Public Health Fudan University Shanghai200241 China

Restrictions on emission controls were implemented in China to cope with the outbreak of the Coronavirus Disease 2019 (COVID-19), providing a chance to study the impacts of anthropogenic emissions on air quality. Subsequently, three-year measurements of PM2.5 chemical composition and light absorption were conducted in a typical megacity (Suzhou) of the Yangtze River Delta in China from 2019 to 2021. Overall, the annual observation period is divided into four stages: Normal Days, Chinese New Year, Lockdown, and Work Resumption. Our results show that the concentrations of chemical species (such as NO3-, SO42-, OC, EC) in PM2.5 and other gas species, including SO2, NO2, and CO from 2019 to 2021 decreased gradually, which were associated with emission reduction. During the four stages, the COVID-19 lockdown period had the lowest concentration of BC and PM2.5, indicating that strict emission control could significantly improve the air quality. The significant increase of O3 during the COVID-19 lockdown period is likely due to the reduced emission of NO from the traffic, which could weaken the effect of NO on O3 formation. The Normal Days in 2020 has the highest mass loadings of SO42-, NO3-, NH4+, OC, and EC, while the mass concentrations of SO42-, NO3-, NH4+, Cl-, and Na+ in the Lockdown were the lowest. Meanwhile, the aerosol light absorption has decreased yearly, and the significant decreases in light absorption were observed during the COVID-19 lockdown when compared to other stages. The highest frequency of Absorption Ångström exponent (AAE) ranges from 1.3 to 1.4, indicating that brown carbon played critical contributions to the light absorption. The mass concentration and fraction of fuel fossil were significantly higher than that of biomass burning during the whole campaign. The remarkable decline of fuel fossil during the COVID-19 lockdown can be attributed to the closure of factories and the reduction of vehicle emissions. The potential contribution source funct

关键词： COVID-19

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