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The Microbial Oxidation of Pharmaceuticals in an Anaerobic Aqueous environment: Effect of Isolated Fractions of Dissolved Organic Matter from Different Sources

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SSRN 2023年

作者： Li, Qingshan Bu, Qingwei Bai, Zhuoshu Wu, Xiaoze Yu, Gang Cao, Hongmei Yang, Lei Tang, Jianfeng School of Chemical & Environmental Engineering China University of Mining & Technology-Beijing Beijing100083 China Advaced Interdisciplinary Institute of Environment and Ecology Beijing Normal University Beijing102206 China State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental Science Chinese Academy of Sciences Beijing100085 China Key Laboratory of Urban Environment and Health Institute of Urban Environment Chinese Academy of Sciences Xiamen361021 China

Hyporheic zones are the interface between surface water and groundwater, which are characterized by high contents of dissolved organic matter (DOM) and diverse microbial communities. DOM consists of different fractions which possess distinct physiochemical properties. How the effect of diverse DOM fractions on the biodegradation of pharmaceuticals under reducing conditions is scarcely known. To address this knowledge gap, we explored the effect of fractions of DOMs collected from four different sources on the anaerobic microbial oxidation of two typical pharmaceuticals, i.e., ritonavir (RTV) and tetracycline (TC) by using simulated anaerobic microcosms. The results showed that humic acid and fulvic acid fractions from allochthonous DOM promoted the biodegradation of TC (12.2% per mgC/L) and RTV (14.5% per mgC/L), and hydrophilic fractions had no significant influence on the biodegradation. However, algal-derived DOM from autochthonous DOM promoted the biodegradation of TC (4.17% per mgC/L) and inhibited the biodegradation of RTV. Combining correlated analysis and partial least squares path model found that the level of humification and aromatization of DOM fractions increased had a positive contribution to pharmaceuticals biodegradation. Further, the promotive mechanism was explained by response of quinone moieties in DOM as extracellular electron acceptors that yields more energy to support microbial metabolism. These results provide a more comprehensive understanding of diverse DOM fractions mediating microbial anaerobic oxidation of trace organic contaminants and extend the insight into contamination control and remediation technology. © 2023, The Authors. All rights reserved.

关键词： Biodegradation

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Microbial effects on flow rates and dissolved organic carbon migration through inactive supply wells: Insights into the mechanisms of biological clogging

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Journal of Hydrology 2025年 660卷

作者： Wen, Zhang Li, Xu Zhu, Qi Huang, Jianlong Jakada, Hamza School of Environmental Studies China University of Geosciences NO. 68 Jincheng Street East Lake High-Tech Development Zone Hubei Wuhan430074 China State Key Laboratory of Deep Coal Mining and Environment Protection School of Earth and Environment Anhui University of Science and Technology Huainan232001 China Department of Civil Engineering Baze University Abuja Nigeria

Inactive supply wells (ISWs) can act as preferential flow paths facilitating the transfer of dissolved nutrients, petroleum pollutants and other undesirable constituents between aquifers, which can degrade groundwater quality, through a process known as cross-contamination. Specifically, dissolved organic carbon (DOC) can migrate into deep aquifers through ISWs, influencing the migration and transformation of various contaminants. DOC also participates in biogeochemical reactions driven by microbial activity, which can foster biological clogging near ISWs, reducing flow rates and hindering the migration of contaminants. However, the role of biological clogging in altering flow rates and DOC migration through ISWs has not been exhaustively investigated. To address this gap, a novel cross-contamination model for DOC was developed, incorporating advection, radial dispersion, multispecies and multiphase reactive transport and biological clogging, with the aim of elucidating the effects of the microbial processes on flow rates and DOC migration. The finite-difference method was employed to solve the model, and discuss the impacts of biological clogging on hydraulic conductivity, flow rates, spatial concentration distribution and breakthrough curves (BTCs). Our results showed that microbial growth near ISWs results in a reduction in porosity (approximately 45 %) and hydraulic conductivity (approximately 64 %) in a confined aquifer. In addition, biological clogging decreases flow rates, while higher concentrations of dissolved oxygen (DO) exacerbate the clogging, further reducing flow rates. Finally, microbial consumption of DOC results in a reduction in its migration range. These biological effects play a crucial role in the protection of groundwater resources, and these findings provide valuable insights for the management of ISWs, especially regarding biological clogging mechanisms and the protection of deep groundwater resources. © 2025 Elsevier B.V.

关键词： Aquifers

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Advantages of Bi-Bio-Selector for Nitrogen and Phosphorus Removal (Bbsnp) Process in Treating Low C/N Wastewater: In View of Performance, Microbial Mechanism, Co2 Emission and Economy

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SSRN 2022年

作者： Li, Donghui Li, Weiguang Zhang, Duoying Zhang, Kailei Lv, Longyi Zhang, Guanglin School of Environment Harbin Institute of Technology Harbin150090 China State Key Laboratory of Urban Water Resource and Environment Harbin Institute of Technology Harbin150090 China School of Civil Engineering Heilongjiang University Harbin150080 China Tianjin Key Laboratory of Clean Energy and Pollution Control School of Energy and Environmental Engineering Hebei University of Technology Tianjin300401 China

For solving the challenge of difficult nutrient removal, high running cost and CO2 emission at low C/N, BBSNP process was developed. In this study, full-scale BBSNP and AAO were run parallelly under low C/N (3.5-2) municipal wastewater. It showed BBSNP was less influenced by low C/N than AAO and achieved better nitrogen removal performance. The mechanism of performance advantage in BBSNP was analyzed by mass balance and high throughout sequencing. It demonstrated BBSNP developed unique microbial community at C/N of 2. Higher abundance of Saccharibacteria, Flavobacterium, Ottowia, Dokdonella, Candidatus_Nitrotoga and Nitrospira in BBSNP was responsible for better COD utilization efficiency, denitrification, denitrifying phosphorus removal and nitrification. Meanwhile, under low C/N, BBSNP could save 9.81% organic carbon and 14.77% oxygen requirement, reduce 53.3% running cost and 21.21% CO2 emission. This research provided theory reference and technology support in treating low C/N wastewater. BBSNP had good applying perspective in AAO-type WWTPs upgrade. © 2022, The Authors. All rights reserved.

关键词： Denitrification

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Field Study of Meeting Thermal Needs of Occupants in Old Residential Buildings in Low-Temperature environments Using Personalized Local Heating

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SSRN 2023年

作者： Yang, Zhen Zhang, Weirong Liu, Hongkai Zhang, Weijia Qin, Mingyuan Key Laboratory of Green Built Environment and Energy Efficient Technology Beijing University of Technology Beijing100124 China Chongqing Research Institute of Beijing University of Technology Chongqing401121 China College of Automotive Engineering Jilin University Changchun130025 China Faculty of Engineering Universiti Malaya Kuala Lumpur50603 Malaysia

Outdated structures and devices in old residential buildings can no longer functionally meet the thermal needs of users and require reasonable supplementary measures to meet the demand. Personalized local heating, owing to its thermal comfort and energy-saving performance, is a good solution for addressing the thermal needs of the occupants. The objective of this study is to examine the influence of personalized local heating on the thermal comfort of occupants in old residential buildings under low-temperature heating. A field study was conducted with 16 participants in typical old residential buildings under different conditions from January to February 2023. The findings revealed that all personalized local heating methods could increase the overall thermal sensation of the participants at background temperatures of 16°C and 19°C, but only a few of them were effective in enhancing the participants' overall thermal comfort. The thermal acceptability vote (TAV) of participants, whether using local individual or personalized local combined heating, varied over time. At 16°C, the participants prefer heating localized combinations of body parts, while at 19°C, they prefer localized individual heating. The analysis showed that the corrective power of heating devices for human thermal comfort is related to the background environment temperature, with stronger corrective power at lower temperatures. Furthermore, as long as the problem of uneven local heating is effectively resolved, radiant devices are the preferred environmental conditioning devices for occupants. This study provides important guidance, both for improving thermal comfort in old residential buildings and for expanding the application of personalized local heating. © 2023, The Authors. All rights reserved.

关键词： Thermal comfort

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Highly Efficient Catalytic Ozonation Degradation of Levofloxacin by Facile Hydrogenation-Modified Red Mud Wastes

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SSRN 2023年

作者： Yan, Chaoqun Cheng, Zhiliang Zhang, Xuan Zhang, Yumei Chen, Xianghan Zeng, Guoquan Xu, Heng Key Laboratory of Bio-resource and Eco-Environment of Ministry of Education College of Life Sciences Sichuan University Sichuan Chengdu610065 China School of Chemistry and Chemical Engineering Chongqing University of Technology Chongqing400054 China

Iron-rich red mud (RM) is a potential catalyst. However, as industrial waste, is strongly alkaline, low effectiveness, and safety concerns are problems that cannot be ignored, it is urgent to mine out a reasonable disposal and utilization technology for the waste. In this study, an effective catalyst (H-RM) was obtained by facile hydrogenation heating modification of red mud. Then above-prepared H-RM was applied in the catalytic ozonation degradation of levofloxacin (LEV). The H-RM exhibited more remarkable catalytic activities than the RM in terms of LEV removal, and the optimal efficiency can reach over 90% within 50 min. The mechanism experiment proved that the concentration of dissolved ozone and hydroxyl radical significantly increased, which enhanced the oxidation effect. Hydroxyl radical (•OH) played a dominant role in the degradation of LEV. In the safety test experiment, it was concluded that lower levels of total hexavalent chromium (total Cr(Ⅵ)) in the solid catalyst and leaching of water-soluble Cr (Ⅵ) in aqueous solution. The results indicated that hydrogenation technology is an available detoxification method for RM and proved that H-RM is highly efficient for catalytic ozonation. This research provides an effective means to fulfill the reuse of industrial waste as an alternative to standard raw materials, and comprehensive utilization of the waste to attain the purpose of treating pollution with wastes. © 2023, The Authors. All rights reserved.

关键词： Hydrogenation

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Enhanced Photo-Fenton Degradation of Dyes Under Visible Light with Recyclable Γ-Fe2o3/Cqds：Catalyst Preparation, Performance and Mechanism Insight

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SSRN 2023年

作者： Xu, Qian Xue, Qian Tan, Shengmei Cheng, Zhiliang Qi, Xueqiang Yan, Chaoqun School of Chemistry and Chemical Engineering Chongqing University of Technology Chongqing400054 China Key Laboratory of Bio-resource and Eco-Environment of Ministry of Education College of Life Sciences Sichuan University Sichuan Chengdu610065 China

Abstract: A low band gap and visible light-responsive heterogeneous Photo-Fenton catalyst of γ-Fe2O3/CQDs micron composite was prepared under the one-pot hydrothermal method. The Photo-Fenton degradation of γ-Fe2O3/CQDstowards dye solution of rhodamine B (RhB), methyl blue (MB), and methyl orange (MO) was studied comparatively with α-Fe2O3. The γ-Fe2O3/CQDs exhibited remarkable catalytic performance for various dyes and with a first-order rate (k) of 14 times higher than that of initial α-Fe2O3 with a low concentration of H2O2 of 0.049 mmol. L-1 and a wider pH range of 3.1 to 7.1. The microstructure of the compounds was observed by XRD, SEM, TEM, FT-IR, and XPS characterization results suggested that the γ-Fe2O3/CQDs nanocomposite was formed through the stable Fe–O–C bonds, thus, the band gap decreased, and it is more favorable for the distance of holes and electrons. The free radical trapping experiment and EPR analysis indicated that •OH and 1O2 were the major active species during the typical photo-Fenton reaction. What’s more, the γ-Fe2O3/CQDs also exhibited good stability and magnetic properties. DFT conclusion shows that the mechanism of the potential determination step (PDS) on α-Fe2O3 (220) is the cleavage of H2O2 with an energy barrier of only 0.08 eV, which is 0.54 eV lower than that of OH* on γ-Fe2O3(220). Thus it can be deemed that γ-Fe2O3/CQDs perform much higher catalytic activity for the dissociation of H2O2 than α-Fe2O3. This work gives a feasible and economical countermeasure of visible light Photo-Fenton dispose of dye wastewater with a recyclable magnetic γ-Fe2O3/CQDsmicron catalyst. © 2023, The Authors. All rights reserved.

关键词： Free radicals

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Selective C–H Acylation of Quinolin-2(1h)-One with Α-Oxocarboxylic Acids at the C3 Position by Sliver Catalysis and its Application in the Synthesis of Palbociclib

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SSRN 2023年

作者： He, Jingwen Zhang, Lixi Xu, Hao Zhu, Dancheng Shen, Chao College of Environment Zhejiang University of Technology Zhejiang Hangzhou310032 China Key Laboratory of Pollution Exposure and Health Intervention of Zhejiang Province College of Biology and Environmental Engineering Zhejiang Shuren University Hangzhou310015 China

An efficient and selective method C3-H acylation of quinolin-2(1H)-one with at the C3 position has been developed. Active molecules containing acylquinolones were synthesized by silver-catalyzed decarboxylation of α-oxycarboxylic acids with quinolin-2(1H)-one in moderate to good yields. This reaction affords a broad substrate scope and good tolerance of functional groups. In addition, using this protocol, the marketed drug Palbociclib could be synthesized easily. © 2023, The Authors. All rights reserved.

关键词： Catalysis

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Synthesis of unique-morphological hollow microspheres of MoS2@montmorillonite nanosheets for the enhancement of photocatalytic activity and cycle stability

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Journal of Materials Science & technology 2020年第6期41卷 88-97页

作者： Peng Chen Shilin Zeng Yunliang Zhao Shichang Kang Tingting Zhang Shaoxian Song Hubei Key Laboratory of Mineral Resources Processing and Environment Wuhan University of TechnologyLuoshi Road 122WuhanHubei430070China School of Resources and Environmental Engineering Wuhan University of TechnologyLuoshi Road 122WuhanHubei430070China

In this work,MoS2@montmorillonite nanosheets hollow microspheres(MoS2@MMTNS-HMS)with a novel morphology structure was successfully synthesized through loading MoS2 to the surface of MMTNS-HMS via hydrothermal *** novel material has been characterized through the measurements of SEM,TEM,Raman spectra and UV–vis absorption *** results have shown that MoS2@MMTNS-HMS emerges higher light-utilization efficiency,density of edge active sites and separation of photoelectrons,owing to its unique hollow structure,vertically-aligned MoS2 nanosheets,which greatly enhances its photocatalytic ***,the cycle stability of MoS2@MMTNS-HMS is much higher than that of pristine MoS2,which is attributed to that MMTNS-HMS greatly inhibits the oxidation of MoS2 during ***2@MMTNS-HMS could be a promising photocatalyst for the applications in the elimination of organic pollutants.

关键词： MoS2 Montmorillonite Hollow microsphere Photocatalytic Methyl orange

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Sustainable Cu2(OH)2CO3/g-C3N4/cellulose acetate-derived porous composite membrane for Congo red and tetracycline removal with photocatalytic self-cleaning properties under natural solar irradiation

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Sustainable Horizons 2023年 5卷

作者： Kong, Lingchao Wang, Qinyu Wang, Yi Yan, Qinlin Qiu, Wenhui Zheng, Chunmiao State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control Southern University of Science and Technology Guangdong Shenzhen518055 China School of Environment Harbin Institute of Technology Harbin150090 China Department of Ocean Science and Engineering Southern University of Science and Technology Shenzhen518055 China EIT Institute for Advanced Study Zhejiang Ningbo315200 China

A highly efficient and sustainable Cu/CN@CA composite membrane was synthesized for the removal of typical dyes and antibiotics by incorporating a Cu2(OH)2CO3/g-C3N4 heterojunction (Cu/CN) onto a cellulose acetate (CA) membrane. The 0.2Cu/CN@CA membrane with optimized Cu/CN doping achieved superior Congo red (CR) and tetracycline (TC) adsorption capacities of 250.8 and 48.43 mg/g, respectively. Notably, the exhausted 0.2Cu/CN@CA after adsorption saturation could be effectively self-cleaned under natural solar irradiation. Consecutive adsorption-photocatalytic experiments revealed its fine stability and recyclability. Mechanistic exploration based on experimental analysis and DFT (Density Function Theory) calculations revealed that cellulose acetate accommodates the charge transfer interactions between g-C3N4 and Cu2(OH)2CO3, wherein many photogenerated electrons were generated and migrated from g-C3N4 to Cu2(OH)2CO3. This type II heterojunction transfer pathway induced the strong oxidizability of the 0.2Cu/CN@CA membrane with plenty of active species for the photocatalytic degradation of the adsorbed CR and TC contaminants under solar light irritation. This study provided a novel sustainable membrane-based adsorbent for the enhanced dye and antibiotic contaminant remediation of aquatic environments. © 2023

关键词： Adsorption

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Corrosion Performance of Stainless Steel Reinforcement in the Concrete Prepared with Seawater and Coral Waste and Its Ecological Effects

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Journal of Renewable Materials 2020年第5期8卷 513-534页

作者： Xingguo Feng Yiji Zhang Xiangyu Lu Yiwen Xu Leyuan Zhang Chao Zhu Tong Wu Yashi Yang Xuhui Zhao Jiangsu Key Laboratory of Coast Ocean Resources Development and Environment Security Hohai UniversityNanjing210098China State Key Laboratory of Green Building Materials Beijing100024China Key Laboratory of Marine Materials and Related Technologies Ningbo Institute of Materials Technology and EngineeringChinese Academy of SciencesNingbo315201China College of Water Conservancy Engineering Wanjiang University of TechnologyMaanshan243000China School of Materials Science and Engineering Beijing University of Chemical TechnologyBeijing100029China

Durability and ecological effects of the stainless steel reinforced coral waste concrete were compared with those of the carbon steel reinforced ordinary *** results showed that the corrosion current densities of the stainless steel in the coral waste concrete were less than one-tenth of those of the carbon steel in the same grade ordinary *** stainless steel in the seawater coral waste concrete maintained passivation even after more than two years of immersion in 3.5%NaCl solution,while the carbon steel counterparts in the ordinary concrete were seriously corroded under the same ***,the corrosion current density of the stainless steel reinforcement decreased slightly with the strength grade of the coral waste *** ecological evaluation indicated that the non-renewable energy consumption and CO_(2)emission of per cubic meter of the newly constructed stainless steel reinforced coral waste concrete were 23.72%and 1.419%less than those of the carbon steel reinforced ordinary concrete with the same grade,while the aforementioned two parameters of the former material were reduced by 44.81%and 32.0%in comparison to the latter one in 50 years duration.

关键词： Coral waste stainless steel seawater green concrete corrosion

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