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Identification of high oxygen-consuming substances in stormwater drainage systems illicitly connected with sewage system

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Journal of environmental sciences 2024年第4期138卷 132-140页

作者： Chen Xu Zuxin Xu Wenhai Chu Shanshan Wu Rong Xiao Lei Su State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China Ministry of Education Key Laboratory of Yangtze River Water Environment Tongji UniversityShanghai 200092China Guangzhou Resource Environmental Protection Technology Co. Ltd.Guangzhou 510030China

The dissolved oxygen content in water is an important indicator for assessing the quality of the water environment,and maintaining a certain amount of dissolved oxygen is essential for the healthy development of the ecological *** a water body is anoxic,the activity of anaerobic microorganisms increases and organic matter is decomposed to produce a large number of blackening and odorizing substances,resulting in black and odorous water bodies,which is a very common and typical phenomenon in ***,there is still a relatively universal occurrence of illicitly connected stormwater and sewage pipes in the urban drainage pipe network in China,which makes oxygen-consuming substances be directly discharged into rivers through stormwater pipes and consume the dissolved oxygen in the water bodies,resulting in an oxygen deficiency of the *** induces seasonal or year-round black and stink phenomena in urban ***,identifying high oxygen-consuming substances,which lays the foundation for the subsequent removal of oxygen-consuming substances,is *** a series of comparisons of water quality indicators and analysis of organic characteristics,it was found that the oxygen consumption capacity of domestic sewage was higher than that of industrial wastewater in the selected area of this study,and the oxygen-consuming substances of domestic sewage were small molecular amino *** comparing 20 conventional free amino acids,it was found that seven of them consumed oxygen easily,and compared with chemical oxygen consumption,biological oxygen consumption was in a leading position.

关键词： Urban drainage system Oxygen-consuming substances Domestic sewage Amino acid

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Advanced modeling of the absorption enhancement of black carbon particles in chamber experiments by considering the morphology and coating thickness

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Frontiers of environmental science & engineering 2024年第9期18卷 129-142页

作者： Xiaodong Wei Jianlin Hu Chao Liu Xiaodong Xie Junjie Yin Song Guo Min Hu Jianfei Peng Huijun Wang 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&TechnologyNanjing 210044China Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters Key Laboratory of Meteorological Disaster(Ministry of Education)Nanjing University of Information Science and TechnologyNanjing 210044China Nansen−Zhu International Research Centre Institute of Atmospheric PhysicsChinese Academy of SciencesBeijing 100029China East China Air Traffic Management Bureau CAAC Shanghai 200335China State Key Joint Laboratory of Environmental Simulation and Pollution Control International Joint Laboratory for Regional Pollution Control(IJRC)(Ministry of Education)College of Environmental Sciences and EngineeringPeking UniversityBeijing 100871China Tianjin Key Laboratory of Urban Transport Emission Research&State Environmental Protection Key Laboratory of Urban Ambient Air Particulate Matter Pollution Prevention and Control College of Environmental Science and EngineeringNankai UniversityTianjin 300071China

Measurements studies have shown that the absorption of radiation by black carbon(BC)increases as the particles ***,there are significant discrepancies between the measured and modeled absorption enhancement(E_(abs)),largely due to the simplifications used in modeling the mixing states and shape *** took advantage of chamber experiments on BC aging and developed an efficient method to resolve the particle shape based on the relationship between the coating fraction(ΔD_(ve)/D_(ve),0)and fractal dimension(D_(f)),which can also reflect the variations of D_(f)during the whole BC aging *** with externally and partly mixed states(0≤ΔD_(ve)/D_(ve),0≤0.5)can be considered to be uniformly distributed with the D_(f)values of 1.8–2.1,whereas the Df values are constrained in the range 2.2–2.8 for fully mixed states(ΔD_(ve)/D_(ve),0>0.5).The morphological parameters(i.e.,the effective density and the dynamic shape factor)were compared with the measured values to verify the simulated *** simulated mean deviations of morphological parameters were smaller than 8%for the method resolving the particle *** applying a realistic shape and refractive index,the mass absorption cross for fully mixed states can be improved by 11%compared with a simplified core–shell *** on our understanding of the influence of D_(f)andΔD_(ve)/D_(ve),0 on E_(abs),we propose a two-stage calibration equation to correct the E_(abs)values estimated by the core–shell model,which reduces the simulation error in the Mie calculation by 6%–14%.

关键词： Black carbon Mixing states Fractal dimension Dynamic shape factor Absorption enhancement

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reliability modeling of the bivariate deteriorating product with both monotonic and non-monotonic degradation paths

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Journal of Systems engineering and Electronics 2021年第4期32卷 971-983页

作者： SUN Fuqiang GUO Hongxuan LIU Jingcheng School of Reliability and Systems Engineering Beihang UniversityBeijing 100191China Science and Technology on Reliability and Environmental Engineering Laboratory Beihang UniversityBeijing 100191China Wuhan Maritime Communication Research Institute Wuhan 430079China

Fiber optical gyroscope(FOG)is a highly reliable navigation element,and the degradation trajectories of its two accuracy indexes are monotonic and non-monotonic *** this paper,a flexible accelerated degradation testing(ADT)model is used for analyzing the bivariate dependent degradation process of *** time-varying copulas are employed to consider the dynamic dependency structure between two marginal degradation processes as the Wiener process and the inverse Gaussian *** statistical inference is implemented by utilizing an inference function for the margins(IFM)*** is demonstrated that the proposed method is powerful in modeling the joint distribution with various margins.

关键词： fiber optical gyroscope bivariate accelerated degradation testing Wiener process inverse Gaussian process time-varying copulas dependence

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Evaluation on quality and health risk of groundwater in a highly urbanized watershed, China

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environmental science and Pollution Research 2024年第18期31卷 27136-27154页

作者： Li, Jingjing Zhang, You-Kuan Zhao, Yuqing College of Environmental Science and Engineering Guilin University of Technology Guilin541004 China Urban Planning & amp Design Institute of Shenzhen Shenzhen518000 China The Guangxi Key Laboratory of Theory and Technology for Environmental Pollution Control Guilin University of Technology Guilin541006 China Collaborative Innovation Center for Water Pollution Control and Water Safety in Karst Area Guilin University of Technology Guilin541004 China School of Environmental Science and Engineering Southern University of Science and Technology Shenzhen518055 China

Urbanizations and industrializations may accelerate the contamination and deterioration of groundwater quality. This study aimed to evaluate the quality and potential human health risks associated with shallow groundwater in Shenzhen, China, a city characterized by high levels of urbanization and industrialization. The hydrochemistry characteristics, water quality levels, and human health risks of main ions, nutrient elements, and metals in 220 samples collected from Maozhou River Basin (MRB) located in the northwest of Shenzhen were investigated. It showed that chemical constituents of the groundwater were further complicated by seawater intrusion and urbanization expansion. Water quality evaluated by fuzzy comprehensive method showed that 21.05% of samples distributed around reservoirs were classified into grade II or better. Nearly 79% of samples distributed in the densely populated urban land were classified into grade III or worse, indicating pollution from anthropogenic factors cannot be ignored. For the river tidal reach where river stage fluctuated about 0.5 to 1.5 m within a tidal cycle, the chemical composition of groundwater was influenced by frequent water exchange with the river. The carcinogenic and non-carcinogenic health risks for different age groups, from the high to the low, were children, adult women, adult men, adolescent women, and adolescent men, respectively. Approximately 39% of groundwater samples distributed around the densely populations area with health risk larger than 5 × 10−5 were unacceptable for children. This investigation would be helpful for improving groundwater management and as a practical reference for sustainable groundwater exploitation in the MRB. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.

关键词： Groundwater

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Barriers and opportunities towards monitoring and asset management of EU transport infrastructure

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ce/papers 2023年第5期6卷 491-497页

作者： Scibilia, Elena Hoff, Inge De Urquia, Miguel A. Vliet, Agnieszka Bigaj-van Norwegian University of Science and Technology Department of Civil and Environmental Engineering Trondheim Norway Ferrovial Construction Innovation department Madrid Spain Department of Structural Reliability TNO The Hague Netherlands

Recent technological developments have clear potential to support paradigm shift from corrective maintenance towards risk-based/predictive maintenance through data-informed decision-making. The most promising developments are already taken up by local communities. Acknowledging that successful development, rollout and implementation of standardisation is only possible with thorough understanding of the full context, the H2020 CSA IM-SAFE project evaluated the main barriers and opportunities that need to be overcome to enable well-functioning monitoring and maintenance of transport infrastructure. As the European countries have different political, economic and social situations, the analyses have been performed on the national level, and the outcomes have been aggregated to identify main barriers at EU level. This paper presents the outcomes of the analysis of PEST barriers and SWOT analyses and discusses the connection between the barriers and the limitations in the existing EU monitoring standards and opportunities for the national implementation. Finally, the article highlights the importance to consider different scenarios and their potential environmental constraints in order to ensure that the exploitation opportunities are successful and sustainable in the long-term. © 2023 The Authors. Published by Ernst & Sohn GmbH.

关键词： Standardization

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Multi-timescale feature extraction method of wastewater treatment process based on adaptive entropy

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Chinese Journal of Chemical engineering 2024年第12期76卷 264-271页

作者： Honggui Han Yaqian Zhao Xiaolong Wu Hongyan Yang School of Information Science and Technology Beijing University of TechnologyBeijing 100124China College of Environmental Sciences and Engineering Beijing University of TechnologyBeijing 100124China Beijing Key Laboratory of Computational Intelligence and Intelligent System Beijing 100124China Engineering Research Center of Digital Community Ministry of EducationBeijing 100124China

In wastewater treatment systems,extracting meaningful features from process data is essential for effective monitoring and ***,the multi-time scale data generated by different sampling frequencies pose a challenge to accurately extract *** solve this issue,a multi-timescale feature extraction method based on adaptive entropy is ***,the expert knowledge graph is constructed by analyzing the characteristics of wastewater components and water quality data,which can illustrate various water quality parameters and the network of relationships among ***,multiscale entropy analysis is used to investigate the inherent multi-timescale patterns of water quality data in depth,which enables us to minimize information loss while uniformly optimizing the ***,we harness partial least squares for feature extraction,resulting in an enhanced representation of sample data and the iterative enhancement of our expert knowledge *** experimental results show that the multi-timescale feature extraction algorithm can enhance the representation of water quality data and improve monitoring capabilities.

关键词： Feature extraction Knowledge graph Wastewater treatment process Adaptive entropy

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Enhanced degradation of florfenicol by microscale SiC/Fe:Dechlorination via hydrogenolysis

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Chinese Chemical Letters 2024年第7期35卷 218-221页

作者： Yun-Fei Zhang Chun-Hui Zhang Jian-Hui Xu Lei Li Dan Li Jin-Hong Fan Jiale Gao Xin Quan Qi Wu Yue Zou Yan-Ling Liu Dongguan University of Technology School of Environment and Civil EngineeringDongguan 523830China State Key Laboratory of Pollution Control and Resource Reuse School of Environmental Science and EngineeringTongji UniversityShanghai 200092China

Herein,the degradation of florfenicol(FLO)over zero-valent iron(ZVI)enhanced by SiC was systematically *** was found that 5 g/L of ZVI/SiC(1:3)at pH 3.0 could completely degrade 20 mg/L of FLO within 1 h,with a Kobsvalue of 0.0873 min^(-1),12.5 times greater than that of pure ZVI(0.0069 min^(-1)).Vibrating sample magnetometer(VSM)characterizations revealed that the use of SiC supporter reduces the magnetic intensity of ZVI,which mitigates iron particle agglomeration,increases Brunauer-Emmett-Teller(BET)surface area,and enhances FLO degradation ***,ZVI/SiC exhibits a much lower hydrogen evolution potential(HEP)and significantly higher corrosion currents compared to pure *** was proposed to undergo degradation via reductive dechlorination,involving a hydrogenolysis mechanism that entails the cleavage of theσ*** study provides new insights into the reduction hydrogenation mechanism of ZVI.

关键词： Zero-valent iron Silicon carbide Reductive dechlorination Hydrogenolysis Florfenicol

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Hydrothermal temperature-dependent compositions and copper complexing behaviors of hydrochar-derived dissolved organic matter: Insights from FT-ICR MS and multi-spectroscopic analysis

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Journal of environmental sciences 2025年第6期152卷 685-700页

作者： Bingfa Chen Xincai Gu Muhua Feng Yanfang Feng Bingyu Wang Bensheng You Jingcheng Zheng Hong Liu Shiqun Han State Environmental Protection Key Laboratory of Aquatic Ecosystem Health in the Middle and Lower Reaches of Yangtze River Nanjing 210093China Key Laboratory of Agro-Environment in Downstream of Yangtze Plain Ministry of Agriculture and Rural AffairsInstitute of Agricultural Resources and EnvironmentJiangsu Academy of Agricultural SciencesNanjing 210014China School of Environmental Science and Engineering Suzhou University of Science and TechnologySuzhou 215009China State Key Laboratory of Lake Science and Environment Nanjing Institute of Geography and LimnologyChinese Academy of SciencesNanjing 210008China School of Environmental and Biological Engineering Nanjing University of Science and TechnologyNanjing 210094China Jiangsu Synthetic Innovation Center for Coastal Bio-agriculture School of WetlandsYancheng Teachers UniversityYancheng 224002China

The copper complexing of dissolved organic matter released from hydrochar(HDOM)affects the former’s environmental *** this study,how hydrothermal temperatures(180,220 and 260℃)influence the molecular-level constitutions and Cu(II)binding features of HDOM were elucidated via fourier transform ion cyclotron resonance mass spectrometry and multi-spectroscopic *** findings demonstrated that the almost HDOM molecules had the traits of lower polarity and higher *** the hydrothermal temperature increased,the molecules with particularly high relative strength gradually disappeared,average molecular weight,percentages of CHON and aliphatic compounds of HDOM reduced while the percentages of CHO and aromatic compounds *** general,the fluorescence quenching of Cu(II)weakened as hydrothermal temperature rose and the Cu(II)binding stability constants of fluorophores in HDOM were 4.50–*** addition,the Cu(II) binding order of fluorophores in HDOM showed temperature heterogeneities, andpolysaccharides or aromatic rings of non-fluorescent substances had the fastest responsesto Cu(II) binding. Generally, fluorescent components tend to bind Cu(II) at relatively traceconcentrations (0–40 μmol/L), whereas non-fluorescent substances tend to the bind Cu(II)at relatively higher concentrations (50–100 μmol/L). This study contributed to the predictionof the potential environmental behaviors and risks of Cu(II) at the molecular level afterhydrochar application.

关键词： Hydrochar Dissolved organic matter Molecular characterizations Cu(II)binding Two-dimensional correlation analysis(2D-COS)

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Ligand-tuning of coordination compound for improved oxygen evolution

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Chinese Journal of Chemical engineering 2024年第12期76卷 292-300页

作者： Kunpeng Yang Yuanjun Liu Yuyu Liu Xingmei Guo Xiangjun Zheng Junhao Zhang Guoxing Zhu School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 202018China School of Chemistry and Chemical Engineering Jiangsu UniversityZhenjiang 202013China Key Laboratory of Advanced Electrode Materials for Novel Solar Cells for Petroleum and Chemical Industry of China School of Chemistry and Life SciencesSuzhou University of Science and TechnologySuzhou 215009China

Controllable regulation of the reconstruction process for the pre-catalysts towards oxygen evolution remains as a great *** this study,we report a bi-ligand strategy to facilitate the structural transformation of coordination compounds to metal oxyhydroxides during oxygen evolution with enhanced activity.A coordination compound consisting of 1,10-ferrocene acid(Fc)and Ni^(2+)was synthesized,in which terephthalic acid was *** second ligand of terephthalic acid facilitates the reconstruction process,inducing an enhanced catalytic *** 1 mol·L^(-1)KOH aqueous solution,the optimized catalyst can drive a current density of 10 mA·cm^(-2)under a lower overpotential of 220 *** this catalyst,zinc-air batteries can be *** obtained zinc-air battery presents a large specific capacity of 718 mA·h·g^(-1)with excellent cycling stability for over 100 h far exceeding that of Pt/C+RuO_(2)battery fabricated with commercial *** excellent performance and low cost of this catalyst will open up broad prospects for the development of advanced systems for water electrolysis and zinc air batteries.

关键词： Catalysis Electrochemistry Zinc-air battery Coordination compounds Oxygen evolution

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Synthesis of reduced graphene oxide supported FeCu and its environmental applications

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environmental science and Pollution Research 2024年第47期31卷 57655-57665页

作者： Ahmad, Ayyaz Qureshi, Abdul Sattar Hassan, Ali Arshad, Muhammad Khurshid, Hifsa Mehmood, Umar Guo, Xuhong State-Key Laboratory of Chemical Engineering East China University of Science and Technology Shanghai200237 China Department of Chemical Engineering and Technology MNS University of Engineering and Technology Multan Pakistan Institute of Biotechnology & amp Genetic Engineering University of Sindh Jamshoro Pakistan State Key Laboratory of Bioreactor Engineering East China University of Science and Technology Shanghai200237 China Institute of Environmental Sciences and Engineering School of Civil and Environmental Engineering National University of Sciences and Technology Islamabad44000 Pakistan Dhahran31261 Saudi Arabia Punjab Human Capital Investment Project Planning & ampDevelopment Board Lahore Pakistan

A significant share of wastewater produced during different processes is released to the surroundings without further treatment. Therefore, polluted water sources are triggering diseases like typhoid. To avoid this, various techniques have been developed for the removal of contaminants from the water. Iron-copper bimetallic nanoparticles (NPs) supported on the reduced graphene oxide (rGOFeCu) were prepared which showed excellent antibacterial activity, efficient dechlorination of 1,1,1-trichloroethane (TCA), and removal of methylene blue (MB). The characterization of prepared nanocomposites was done by transmission electron microscopy (TEM) and X-ray diffraction (XRD). Iron-based bimetallic NPs supported on the graphene were successfully synthesized as confirmed by TEM. Iron has a strong antibacterial effect on microorganisms, especially bacteria. We conducted the antibacterial activity of different compositions of nanocomposite toward Escherichia coli to understand the efficacy of prepared nanocomposites. In the same time and concentration conditions, rGOFeCu showed the best antibacterial activity, as compared to the graphene-based iron. Results show that the excellent antibacterial activity was exhibited by using rGO-Fe95Cu05 within two hours. More than 98% of cell inhibition was observed. The further increase in copper loading has no major effect on antibacterial activity. rGO-Fe95Cu05 exhibited excellent removal efficiency of TCA (99%) within 30 min as compared to other compositions of FeCu. It was found that rGO-Fe95Cu05 exhibited excellent removal efficiency against degradation of methylene blue (MB) through activation of sodium percarbonate (SPC). The results indicated that more than 99% of MB was removed within 15 min. The rGOFeCu represented a great potential material for antibacterial activity towards E. coli and remediation of other pollutants in the wastewater such as TCA and removal of MB. Graphical Abstract: (Figure presented.) © The Author(s), under e

关键词： Escherichia coli

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