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SSRN 2022年

作者： Tian, Jie Wei, Junyan Sun, Ping Liang, Yeping Guo, Ruixue Li, Beibei Qu, Ruijuan Zhou, Dongmei Wang, Zunyao State Key Laboratory of Pollution Control and Resources Reuse School of the Environment Nanjing University Jiangsu Nanjing210023 China

关键词： Magnetite

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Catalytic Ozonation of an Imidazole Ionic Liquid Via Fe3o4-Zno Nanocomposites: Performance, Products and Reaction Mechanism

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SSRN 2022年

作者： Tian, Jie Wei, Junyan Liang, Yeping Guo, Ruixue Li, Beibei Qu, Ruijuan Zhou, Dongmei Wang, Zunyao Sun, Ping State Key Laboratory of Pollution Control and Resources Reuse School of the Environment Nanjing University Jiangsu Nanjing210023 China

This study aimed to investigate the catalytic performance of Fe3O4-ZnO in the ozonation of 1-hexyl-3-methyl imidazolium bromide ([HMIM]Br). The Fe3O4-ZnO composite was prepared by a quick and convenient two-step coprecipitation method, and the optimum mass ratio of Fe3O4:ZnO was determined as 1:8. The structure, surface morphology, and chemical composition of the Fe3O4-ZnO composites were studied by characterization methods. The degradation efficiency of [HMIM]Br reached 96% in five minutes in catalytic ozonation with the Fe3O4-ZnO composite, an increase of 20% compared with ozonation alone. Moreover, the pseudo-first-order rate constant increased by a factor of approximately 1.5. With the increase in the Fe3O4-ZnO dosage, the degradation efficiency of [HMIM]Br first improved and then decreased, and the optimum dosage was 0.25 g/L. The increase in pH value and the introduction of Cu2+ effectively promoted the catalytic ozonation of [HMIM]Br with Fe3O4-ZnO, while the reducing inorganic ions inhibited the ozonation reaction. Different water matrices had little influence on the catalytic performance of Fe3O4-ZnO. Radical scavenging and EPR experiments showed that hydroxyl radicals (•OH), superoxide radicals (O2•-) and singlet oxygen (1O2) were the main active species in this system. Meanwhile, product identification showed that the degradation of [HMIM]Br mainly included hydroxylation, imidazole ring cleavage and bond cleavage. Toxicity prediction illustrated that the catalytic ozonation of [HMIM]Br could effectively reduce its toxicity. The efficiency, toxicity, reusability, and stability experiments suggested that the developed catalyst, Fe3O4-ZnO composite, had promising prospects in catalytic ozonation. © 2022, The Authors. All rights reserved.

关键词： Zinc oxide

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Revisiting the Role of H2o2 in Periodate Electro-Activation System: The Non-Dependence in Pollutant Removal

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SSRN 2024年

作者： Zhou, Zhengwei Ye, Guojie Zong, Yang Zhao, Zhenyu Hou, Chengsi Chen, Zuofeng Wu, Deli State Key Laboratory of Pollution Control and Resources Reuse College of Environmental Science & Engineering Key Laboratory of Urban Water Supply Water Saving and Water Environment Governance in the Yangtze River Delta of Ministry of Water Resources Shanghai Institute of Pollution Control and Ecological Security Tongji University Shanghai200092 China Shanghai Key Laboratory of Chemical Assessment and Sustainability School of Chemical Science and Engineering Tongji University Shanghai200092 China

The existence of hydrogen peroxide (H2O2) within the electro-activation of periodate (PI) system is conventionally considered as conducive to the removal of pollutants. However, this study discovered an unusual phenomenon: the pollutants removal did not depend on H2O2. The removal efficiency of pollutants and the yield of hydroxyl radical (·OH) are enhanced after quenching H2O2. Therefore, this study aims to revisit and delve deeper into the role of H2O2, particularly in the generation of active species. Mixed metal oxide and graphite felt are selected as the anode and cathode for the activation of PI in Bisphenol A (BPA) degradation. There exist two distinct pathways for PI activation, including direct cathodic electroreduction and indirect in-situ generated H2O2 catalysis. The BPA removal efficiency increased after adding catalase, with all efficiencies exceeding 80% within 40 minutes. Meanwhile, multiple probing techniques clearly identify the variety of active species and generation pathway such as Electron paramagnetic resonance (EPR), LC-QTOF-MS, and quenching experiment. Electrogenerated H2O2 serves as a precursor for the generation of superoxide radical anions (O2·-) and singlet oxygen (1O2), yet it diminishes the efficiency of direct cathode activation due to the consumption of PI. Furthermore, the system demonstrated excellent stability, applicability, and cleanliness, effectively removing contaminations without the accumulation of iodine byproducts. The degradation intermediates products of BPA are monitored and the toxicities are evaluated. The study provides novel insights into the regulation of active species for contaminant elimination and electrode design, holding significant implications for specialized sewage treatment. © 2024, The Authors. All rights reserved.

关键词： Hydrogen peroxide

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Accelerated Photochemical Generation of Reactive Species in Microdroplets by Humic-Like Substances: Role of the Air-Water Interface and Molecular Mechanism

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Environmental science & technology 2025年第24期59卷 2025 Jun 11页

作者： Longgang Chu Haoran Yu Xinhao Wang Zhaoyue Sun Danning Lu Ruobing Wang Hongjian Li Zhanghao Chen Juan Gao Davide Vione Cheng Gu State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University Nanjing 210023 P. R. China. Institute of Soil Science Chinese Academy of Sciences Nanjing 211135 P. R. China. Dipartimento di Chimica Università di Torino Via Pietro Giuria 5 Torino 10125 Italy.

Atmospheric humic-like substances (HULIS) are crucial components of aerosols that absorb light and produce reactive species, influencing air quality, climate change, and human health. However, most studies on the photochemical processes of HULIS have focused on bulk solutions, neglecting microdroplets, ubiquitous in aerosols, and exhibiting distinct physicochemical properties from bulk phases. Here, we report on the photochemical production of reactive species by three HULIS representatives. The steady-state concentrations of O, HO, OH, and excited triplet states (HS*) in microdroplets were significantly higher than those in the bulk aqueous phase. The partial solvation effect and high electric field in microdroplets could facilitate charge separation in light-excited HS, with the enhanced production of HS and HS* species. HS could increase the generation of O and HO and subsequent formation of OH. Fluorescence excitation-emission matrix spectroscopy combined with ion cyclotron resonance mass spectrometry showed that condensed aromatics and lignin were the most active HULIS components. These findings underscore the significant contribution of photosensitization by HULIS in microdroplets to the atmospheric oxidation capacity, which can have significant implications for the conversion of aqueous secondary organic aerosols and the overall quality of the atmospheric environment.

关键词： interface reaction microdroplet organic matter photochemistry reactive oxygen species

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Combined Application of Biochar and Metal-Tolerant Bacteria Alleviates Cadmium Toxicity by Modulating Antioxidant Defense Mechanism and Physio-Chemical Attributes in Rice (Oryza Sativa L.) Grown in Cadmium-Contaminated Soil.

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SSRN 2023年

作者： Ahmad, Shoaib Sehrish, Adiba Khan Zhang, Lidan Waseem, Muhammad Ullah, Inam Tabassam, Rohina Ali, Shafaqat State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Jiangsu Nanjing210023 China Department of Environmental Sciences Government College University Faisalabad Faisalabad38000 Pakistan State Key Laboratory of Pharmaceutical Biotechnology School of Life Sciences Nanjing University Nanjing210023 China

Agriculture soil contamination by heavy metal (Cadmium) is widespread issue and cause deleterious effect on crops. One of the most effective and eco-friendly methods for cadmium detoxification is microbe-assisted phytoremediation and soil amended application with biochar. In this current study synergistic effect of biochar with microbes were examined. Accordingly, a pot trail was performed to studied the synergistic effect of cadmium tolerant microbes (Bacillus cereus strain B2), biochar (Parthenium hysterophorus L.) on rice grown in cadmium contaminated soil (0, 10, 15 and 20 mg/kg). In compared to non-contaminated soil, results revealed that cadmium caused damage to plant health and maximum reduction in plant biomass, gas exchange parameters and chlorophyll content were observed on cadmium 20mg/kg. Among the sole application of biochar (2%) and microbes, highest plant height (33.68 %), Photosynthetic rate (23.52%) Stomatal conductance (48.93%), water use efficiency (21.41%), transpiration rate (58.87%), chlorophyll a (74.81%), chlorophyll b (31.28%), total chl (60.53%) and carotenoids (26.97%) were recorded at combined application of biochar and microbe. Similarly, Superoxidase (SOD), Catalase (CAT), Peroxidase (POD) and Absorbate peroxidase (APX) activities were significantly boosted at combined application of microbes and biochar (2%), which were (33.90%), (24.18%), (51.70%) and (19.06%) respectively, while significant reduction was found in the ROS (16.60%), (20.06%) and MDA (26.08%) content in rice plant. However, cadmium concentration in different parts of plant were decreased at higher concentrations of biochar (2%) with microbes. These finding indicates that combined application of Bacillus cereus strain B2 and biochar could be a promising strategy to reduce rice crop cadmium toxicity and boost its growth, physiology and defense system efficiently as compared to sole applications. © 2023, The Authors. All rights reserved.

关键词： Antioxidants

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Enhanced copper passivation in pig manure composting through iron nanoparticle amendment

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Science of the Total Environment 2025年 958卷 177950页

作者： Yang, Wenqing Zhong, Yuanping Zhuo, Qian Xiao, Liren Owens, Gary Chen, Zuliang Fujian Provincial Key Lab of Coastal Basin Environment Fujian Polytechnic Normal University Fujian Province Fuqing350300 China Fujian Key Laboratory of Pollution Control & Resource Reuse Fujian Province Fuzhou350007 China Environmental Contaminants Group Future Industries Institute University of South Australia Mawson Lakes Campus SA5095 Australia

As the world's leading producer of pigs, China is now experiencing large-scale pollution derived from agricultural usage of untreated pig manure, where passivation of metal toxicity in pig manure is a major challenge. Here, the effect of green synthesized iron nanoparticle (G-nFe) addition on copper (Cu) transformations during thermophilic aerobic composting of pig manure was investigated. The results revealed that following addition of G-nFe passivation of active Cu forms, including exchangeable (EXC-Cu), carbonate-bound (CAR[sbnd]Cu), and iron and manganese oxide-bound (IMO[sbnd]Cu) Cu increased by 66.8, 47.5, and 15.4 %, respectively. The fraction of Cu bound to organic matter (OM-Cu) also increased with composting and was influenced by G-nFe dose. Notably, addition of 500 mL kg−1 G-nFe increased OM-Cu to 52.9 %. Residual Cu (RES[sbnd]Cu) concentrations initially rose within the first five days of composting, followed by a subsequent decline, demonstrating that G-nFe addition had dual effects: firstly, an initial 31.3 % increase in RES-Cu five days post-G-nFe addition;and secondly, a subsequent 60.9 % reduction over the entire composting process. Furthermore, OM, Humus and Fourier transform infrared (FTIR) analysis confirmed that the increase in OM-Cu, coupled with G-nFe, facilitated the transformation of Cu into OM-Cu fractions post-composting. This work thus provides new insights into how iron nanomaterials can increase passivation of metal ions during composting. © 2024 Elsevier B.V.

关键词： Copper

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Novel perspective for urban water resource management: 5R generation

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Frontiers of Environmental Science & Engineering 2021年第1期15卷 1-13页

作者： Lijie Zhou Hongwu Wang Zhiqiang Zhang Jian Zhang Hongbin Chen Xuejun Bi Xiaohu Dai Siqing Xia Lisa Alvarez-Cohen Bruce ERittmann State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China College of Chemistry and Environmental Engineering Shenzhen UniversityShenzhen 518060China EnviroSystems Engineering and Technology Co. Ltd.Beijing 100083China National Engineering Research Center for Urban Pollution Control Shanghai 200092China College of Environmental Science and Engineering Qingdao University of TechnologyQingdao 266033China Department of Civil and Engineering University of CaliforniaBerkeleyCA 94720-1500USA Biodesign Swette Center for Environmental Biotechnology Arizona State UniversityTempeAZ 85287-5701USA

Demand for water is expanding with increases in population,particularly in urban areas in developing ***,urban water system needs a novel perspective for upgradation with *** perspective presents a novel 5R approach for managing urban water resources:Recover(storm water),Reduce(toilet flushing water),Recycle(gray water),resource(black water),and reuse(advanced-treated wastewater).The 5R generation incorporates the latest ideas for harvesting storm water,gray water,and black water in its several *** paper has briefly demonstrated each R of 5R generation for water treatment and *** has the chance to upgrade its urban water systems according to 5R ***,a demonstration project of 5R generation has been installed in Qingdao International Horticultural Exposition,and Dalian International Convention Center(China)has applied 5R,achieving over 70%water *** 5R offers promise for moving solutions for urban water scarcity from“hoped for in the future”to“realistic today”.

关键词： 5R generation Recover Reduce Recycle resource reuse

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Experimental and numerical modeling of carbonized biomass gasification: A critical review

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Green Carbon 2024年第2期2卷 176-196页

作者： Kannie Winston Kuttin Haowen Yu Mingming Yang Lu Ding Xueli Chen Guangsuo Yu Fuchen Wang Institute of Clean Coal Technology East China University of Science and TechnologyShanghai 200237China Engineering Research Center of Resource Utilization of Carbon-containing Waste with Carbon Neutrality Ministry of EducationChina Shanghai Institute of Pollution Control and Ecological Security Shanghai 200092China State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering Ningxia UniversityYinchuanNingxia 750021China

Gasification is one of the most significant and well-researched pathways to produce energy from biomass among the different options *** is a conversion through thermo-chemical process that takes place within a gasifier,with interconnected factors that have an impact on how well the gasifier *** of carbonized biomass,which has a variety of effects on both the gasification process and the final product,is a significant method of producing energy from raw biomass that contains a lot of moisture or has non-homogeneous *** carbonized biomass has the potential to eliminate or significantly reduce tar formation,which is the most difficult aspect of biomass gasifier design and operation,it has not received the attention it merits even though gasification of biomass is a well-known conversion process with extensive research and development spanning all sectors of the *** review gathers and analyzes the growing number of experimental and numerical modeling approaches in gasification of carbonized biomass based on exact conditions such as type of modeling considerations,feedstock,gasifier,and assessed *** study also provides an overview of various models,such as equilibrium and kinetic rate models and numerical simulations of carbonized biomass gasification schemes based on computational fluid dynamics and Aspen Plus,while comparing the modeling approaches and results for each type of models that are described in the ***,this review encompasses a broad variety of technologies,from laboratory reactors to industrial ***,this review offers a brief overview of the modeling decisions that must be taken at the beginning of a modeling research.

关键词： Carbonized biomass Gasification Thermodynamic model Kinetic model Computational fluid dynamics model

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Elucidating distinct roles of chemical reduction and autotrophic denitrification driven by three iron-based materials in nitrate removal from low carbon-to-nitrogen ratio wastewater

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Chemosphere 2024年 361卷 142470页

作者： Wu, Pei Yang, Fei Lian, Jianjun Chen, Bo Wang, Yulai Meng, Guanhua Shen, Maocai Wu, Haiming College of Energy and Environment Anhui University of Technology Anhui 243002 China Shandong Key Laboratory of Water Pollution Control and Resource Reuse School of Environmental Science & Engineering Shandong University Qingdao266237 China Nanjing Institute of Environmental Sciences Ministry of Ecology and Environment Nanjing210042 China

Effective nitrate removal is a key challenge when treating low carbon-to-nitrogen ratio wastewater. How to select an effective inorganic electron donor to improve the autotrophic denitrification of nitrate nitrogen has become an area of intense research. In this study, the nitrate removal mechanism of three iron-based materials in the presence and absence of microorganisms was investigated with Fe2+/Fe0 as an electron donor and nitrate as an electron acceptor, and the relationship between the iron materials and denitrifying microorganisms was explored. The results indicated that the nitrogen removal efficiency of each iron-based material coupled sludge systems was higher than that of iron-based material. Furthermore, compared with the sponge iron coupled sludge system (60.6%–70.4%) and magnetite coupled sludge (56.1%–65.3%), the pyrite coupled sludge system had the highest removal efficiency of TN, and the removal efficiency increased from 62.5% to 82.1% with time. The test results of scanning electron microscope, X-ray photoelectron spectroscopy and X-ray diffraction indicated that iron-based materials promoted the attachment of microorganisms and the chemical reduction of nitrate in three iron-based material coupled sludge systems. Furthermore, the pyrite coupled sludge system had the highest nitrite reductase activity and can induce microorganisms to secrete more extracellular polymer substances. Combined with high-throughput sequencing and PICRUSt2 functional predictive analysis software, the total relative abundance of the dominant bacterial in pyrite coupled sludge system was the highest (72.06%) compared with the other iron-based material systems, and the abundance of Blastocatellaceae was relatively high. Overall, these results suggest that the pyrite coupled sludge system was more conducive to long-term stable nitrate removal. © 2024 Elsevier Ltd

关键词： Pyrites

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Remarkably efficient Pt/CeO2–Al2O3 catalyst for catalytic hydrodeiodination of monoiodoacetic acid: Synergistic effect of Al2O3 and CeO2

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Chemosphere 2023年第1期327卷

作者： Li, Minghui Li, Wen Yang, Yaning Yu, Dailiang Lin, Jingling Wan, Rui Zhu, Hongjie School of Ecology and Environment Anhui Normal University Wuhu241002 China Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology School of Chemistry and Chemical Engineering Liaocheng University Liaocheng252059 China State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Jiangsu 210023 China

Monoiodoacetic acid (MIAA) is one of the highly toxic halogenated disinfection by-products, which is formed during water disinfection processes. Catalytic hydrogenation with supported noble metal catalyst is a green and effective technique for the transformation of halogenated pollutant, but its activity still needs to be identified. In this study, Pt nanoparticles were supported on CeO2 modified γ-Al2O3 (Pt/CeO2–Al2O3) by chemical deposition method and the synergistic effect of Al2O3 and CeO2 on catalytic hydrodeiodination (HDI) of MIAA was systematically studied. Characterizations revealed that Pt dispersion could be improved by the introduced CeO2 through the formation of Ce–O–Pt bond and MIAA adsorption could be facilitated by high Zeta potential of Al2O3 component. Furthermore, optimal Ptn+/Pt0 could be obtained by adjusting CeO2 deposition amount on Al2O3, which could effectively facilitate the activation of C–I bond. Therefore, Pt/CeO2–Al2O3 exhibited remarkable catalytic activities and TOF values compared with those of Pt/CeO2 and Pt/Al2O3. Through detailed kinetic experiments and characterization, the extraordinary catalytic performance of Pt/CeO2–Al2O3 can be attributed to the abundant Pt sites as well as the synergistic effect between CeO2 and Al2O3. © 2023

关键词： Cerium oxide

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