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SSRN 2023年

作者： Xu, Haolian Tang, Zhenzhen Liang, Zixuan Chen, Hongbin Dai, Xiaohu State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai200092 China

Algal blooms are regarded as a significant source of CH4 emissions. Ultrasound has been gradually employed as a fast and efficient algae removal technology in recent years. However, the changes in water environment and potential ecological effects caused by ultrasonic algae removal are not fully clear. Here, a 40-day microcosm study was performed to simulate the collapse of Microcystis aeruginosa blooms after ultrasonic treatment. The results showed that low-frequency ultrasound at 29.4 kHz for 15 min removed 33.49% of M. aeruginosa and contributed to the destruction of cell structure, but it intensified the leakage of intracellular algal organic matter and microcystins. The accelerated collapse of M. aeruginosa blooms after ultrasonication promoted the rapid formation of anaerobic and reductive methanogenesis conditions, and elevated dissolved organic carbon content. Moreover, the release of labile organics, including tyrosine, tryptophan, protein-like compositions, and aromatic proteins, was facilitated by the collapse of M. aeruginosa blooms after ultrasonic treatment, and they supported the growth of anaerobic fermentation bacteria and hydrogenotrophic Methanobacteriales. This was also demonstrated by the increase in methyl-coenzyme M reductase (mcrA) genes in sonicated algae added treatments at the end of incubation. Finally, the CH4 production in sonicated algae added treatments was 1.43-fold higher than that in non-sonicated algae added treatments. These observations suggested that ultrasound for algal bloom control potentially increased the toxicity of treated water and its greenhouse gas emissions. This study can provide new insights and guidance to evaluate environmental effects of ultrasonic algae removal. © 2023, The Authors. All rights reserved.

关键词： Proteins

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Construction of an Efficient Synergistic Catalytic System Using Dbd Plasma and Fe-Tio2/Rgo/Hcp Catalytic Coating for Ofloxacin Removal

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SSRN 2024年

作者： Zhao, Yimo Zheng, Lijiao Chen, Yongyang Liu, Yuan Huang, Shimeng Li, Shanping Shandong Key Laboratory of Water Pollution Control and Resource Reuse School of Environmental Science and Engineering Shandong University Qingdao266237 China

Fe-TiO2/rGO/honeycomb ceramic plate (Fe-TiO2/rGO/HCP) catalytic coating assisted dielectric barrier discharge (DBD) plasma has successfully constructed an efficient synergistic catalytic system. The catalyst coating was comprehensively characterized, and its structural and morphological characteristics, chemical bond state, optical properties, and catalytic activity were systematically analyzed. The results show that by doping Fe and graphene in TiO2, the catalytic performance of TiO2 can be enhanced by refining its grains and increasing the specific surface area. Ofloxacin (OFLX) was the target pollutant to evaluate the catalytic activity. The effects of different initial conditions (initial pH value, electrolyte concentration, current density, etc.) on the degradation of OFLX were analyzed. Compared with the single DBD plasma system, the catalytic ability of the constructed synergistic catalytic system was significantly improved. Under the optimal initial conditions, the Fe-rGO-TiO2-DBD synergistic system achieved a 99.98% OFLX degradation rate and enhanced energy output after 60 minutes of reaction. The measurements of liquid H2O2 and O3 in the system and free radical scavenging experiments proved that the synergistic method can increase the production of active substances. In addition, the possible OFLX degradation pathways and intermediates were speculated by LC-MS analysis and theoretical calculation. Comprehensive toxicity analysis showed that the toxicity of intermediate products led to a downward trend. Finally, the comprehensive mechanism of DBD synergistic Fe-rGO-TiO2 catalytic degradation of OFLX was summarized. © 2024, The Authors. All rights reserved.

关键词： Titanium dioxide

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Sulfur-Oxidizing Bacteria: Potential Contributors to High-Quality Protein Production Coupled with CO2 Utilization

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Environmental science & technology 2025年第22期59卷 2025 May 30页

作者： Luyao Li Xiaodi Zhao Lei Wang College of Civil Engineering and Architecture Xinjiang University Urumqi Xinjiang 830046 China. State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai 200092 China.

The global protein gap is widening due to population growth, and traditional sources, such as soybeans, are insufficient. Single-cell proteins provide another option, but heterotrophic bacteria emit CO during production, and the production by alga protein is restricted by light supply. Sulfur-oxidizing bacteria (SOB) can use reduced sulfur and CO to synthesize bacterial protein with a high methionine content, which can be used as a supplement to animal feed. So SOB are potential protein producers coupled with CO utilization. However, their efficiency is still low compared to heterotrophic bacteria and alga, which should be further enhanced through energy optimization and metabolic regulation.

关键词： free organic metabolites (FOM) methionine microbial carbon capture single-cell protein (SCP) sulfur-oxidizing bacteria (SOB)

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Challenging the contamination of per- and polyfluoroalkyl substances in water: advanced oxidation or reduction?

Environmental Functional Materials

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Environmental Functional Materials 2022年第3期1卷 325-337页

作者： Zhanghao Chen Xinhao Wang Ruochen Dong Yutong Zhang Xin Jin Cheng Gu State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing 210023 PR China

Nowadays, the increasing discharge of persistent per- and polyfluoroalkyl substances (PFASs) caused serious environmental issues. In addition to advanced oxidation processes (AOPs), advanced reduction processes (ARPs) based on reducing radicals, e.g., hydrated electron and superoxide anions have attracted great attentions as promising methods for remediation of PFASs pollution. This review, based on 128 cited references, provides a critical overview on the performance of different AOPs and ARPs. The unique properties of reactive species, e.g., SO 4 •- and e aq − and their generation mechanisms in different systems were discussed. Moreover, the efficiencies of different systems were further compared from several aspects, e.g., PFASs decomposition rate, reaction time and energy consumption. More specially, for some model compounds of PFASs, such as perfluorooctanoic acid, perfluorooctane sulfonate and perfluoroalkyl ether carboxylic acids, we systematically discussed their degradation and defluorination pathways in both AOPs and ARPs. The reported literatures showed that the degradation pathways of these PFASs are closely related to their head groups in either AOPs or ARPs. Finally, some key conclusions were summarized, and the implications of the state-of-the-art knowledge on practical PFASs remediation in water treatments were summarized and the future priority research directions were proposed.

关键词： Advanced oxidation processes Advanced reduction processes Polyfluoroalkyl substances Degradation mechanism

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Characterization and source apportionment of pharmaceuticals in surface water of the Yangtze Estuary and adjacent sea

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Environmental Science and pollution Research 2024年第39期31卷 52171-52180页

作者： Chen, Chunzhao Tang, Jian Li, Fei Xue, Rui Xiao, Yihua Chen, Ling Yu, Gang Advanced Interdisciplinary Institute of Environment and Ecology Beijing Normal University Zhuhai519087 China Department of Chemistry and Environmental Science New Jersey Institute of Technology NJ United States Institute of Science and Technology Information Beijing Academy of Science and Technology Beijing100089 China School of Environmental and Municipal Engineering Qingdao University of Technology Qingdao266520 China State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai200092 China

Pharmaceuticals, which are closely linked to human activities, have attracted global attention. This study investigated the occurrence characteristics of 20 pharmaceuticals in surface water of the Yangtze Estuary and adjacent sea. A total of 14 targeted pharmaceuticals were detected in both spring and summer sampling campaigns. The mean concentrations of sulfonamides and non-sulfonamides were 36.60 ± 19.43 ng·L−1 and 50.02 ± 41.07 ng·L−1, respectively. As for non-antibiotics, their concentrations were in the range of 24.34 ± 916.8 ng·L−1 with caffeine accounting for 6.17 ~ 86.70% (average percentage of 42.22%). Meanwhile, spatial distribution patterns showed similarities between antibiotics and non-antibiotics, with high levels occurring near the upper estuary, aquaculture areas, wastewater treatment plants, and the maximum turbidity zone. This phenomenon could be related to the sources of pharmaceuticals and the physicochemical properties of water bodies. Obviously, the first three areas are highly impacted by human activities or serve as important sources of terrestrial contaminants entering the East China Sea. The last area retains high amounts of suspended particles which may exert strong trapping effects on hydrophobic chemicals. Principal component analysis revealed the presence of three potential sources for pharmaceuticals in the Yangtze Estuary, with a relatively high percentage originating from incompletely treated municipal sewage. As for the temporal trend, pharmaceutical contamination was found to be higher in spring compared to summer, potentially due to variations in pharmaceutical consumption patterns, local rainfalls, and water temperatures. These findings provide fundamental data support for implementing appropriate local management strategies for pharmaceutical usages. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.

关键词： Antibiotics

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Quantification of the redox properties of microplastics and their effect on arsenite oxidation

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Fundamental Research 2023年第5期3卷 777-785页

作者： Lin Chen Dengjun Wang Tianran Sun Tingting Fan Song Wu Guodong Fang Min Yang Dongmei Zhou State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China School of Fisheries Aquaculture and Aquatic SciencesAuburn UniversityAuburnAL 36849USA State Key Lab of Urban and Regional Ecology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China Ministry of Environmental Protection of the People’s Republic of China Nanjing Institute of Environmental SciencesNanjing 210008China Key Laboratory of Soil Environment and Pollution Remediation Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China

Microplastics have attracted global *** environmental-weathering processes control their fate,transport,transformation,and toxicity to wildlife and human health,but their impacts on biogeochemical redox processes remain largely ***,multiple spectroscopic and electrochemical approaches in concert with wet-chemistry analyses were employed to characterize the redox properties of weathered *** spectroscopic results indicated that weathering of phenol-formaldehyde resins(PFs)by hydrogen peroxide(H2O2)led to a slight decrease in the content of phenol functional groups,accompanied by an increase in semiquinone radicals,quinone,and carboxylic *** and wet-chemistry quantifications,coupled with microbial-chemical characterizations,demonstrated that the PFs exhibited appreciable electron-donating capacity(0.264-1.15 mmol e-g^(-1))and electron-accepting capacity(0.120-0.300 mmol e-g^(-1)).Specifically,the phenol groups and semiquinone radicals were responsible for the electron-donating capacity,whereas the quinone groups dominated the electron-accepting *** reversible redox peaks in the cyclic voltammograms and the enhanced electron-donating capacity after accepting electrons from microbial reduction demonstrated the reversibility of the electron-donating and-accepting *** importantly,the electron-donating phenol groups and weathering-induced semiquinone radicals were found to mediate the production of H2O2 from oxygen for arsenite *** addition to the H2O2-weathered PFs,the ozone-aged PF and polystyrene were also found to have electron-donating and arsenite-oxidation *** study reports important redox properties of microplastics and their effect in mediating contaminant *** findings will help to better understand the fate,transformation,and biogeochemical roles of microplastics on element cycling and contaminant fate.

关键词： Microplastics Weathering Redox property Semiquinone radicals Electron-donating and-accepting capacity Arsenite oxidation

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Facilitating Se(Vi) Adsorption and Electron Transfer by Introducing Αfeooh to Sulfidated Zero-Valent Iron

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SSRN 2024年

作者： Li, Ke Zhang, Yue Qu, Guanjun Xu, Chunhua Shandong Key Laboratory of Water Pollution Control and Resource Reuse School of Environmental Science and Engineering Shandong University Qingdao266237 China

Sulfidation of zerovalent iron (SZVI) enhances electron transfer ability due to the formation of FeSx, which facilitates pollutant removal. However, for pollutants that are difficult to adsorb onto SZVI, the longer electron transfer distance results in inefficient removal. The presence of iron (hydr)oxides on ZVI and SZVI is inevitable, and it can adsorb highly mobile pollutants (such as Se(VI)). Here, we regulated the composition of iron (hydr)oxides on ZVI and SZVI surfaces by aging treatment, which improves their Se(VI) removal performance. Based on this, αFeOOH which has a strong affinity for Se(VI), is introduced onto SZVI to synthesize the high-quality composite SZVI-αFeOOH. The characterization results showed that Fe-OH from αFeOOH and FeSx successfully combined and uniformly distributed on SZVI-αFeOOH, creating active sites, and the Se(VI) removal rate (kobs=0.2211 min-1) increased ~7.4 times over SZVI (kobs=0.0297 min-1). The adsorption and reduction of Se(VI) were optimized by regulating the mass ratio of αFeOOH to SZVI. In addition, different initial Se(VI) concentrations and solution pH were designed to explore the effects on Se(VI) removal and evaluate the best removal reaction condition. The mechanism of Se(VI) removal by SZVI-αFeOOH is as follows: Se(VI) is firstly adsorbed on αFeOOH, which shortens the electron transfer distance, and then the absorbed Se(VI) is reduced to readily immobilized states by SZVI. This work proposes a targeted strategy to modify SZVI to efficiently remove pollutants with strong mobile and difficult adsorption. © 2024, The Authors. All rights reserved.

关键词： Adsorption

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Occurrence, distribution and risk assessment of antibiotics at various aquaculture stages in typical aquaculture areas surrounding the Yellow Sea

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Journal of Environmental Sciences 2023年第4期126卷 621-632页

作者： Jiachao Zhang Xuanrui Zhang Yang Zhou Qianfan Han Xiaoli Wang Chao Song Shuguang Wang Shan Zhao Shandong Key Laboratory of Water Pollution Control and Resource Reuse School of Environmental Science and EngineeringShandong UniversityQingdao 266237China Water Science and Environmental Engineering Research Center College of Chemical and Environmental EngineeringShenzhen UniversityShenzhen 518060China Qingdao Municipal Bureau of Ecology and Environment Qingdao 266003China Analysis and Test Center Qilu University of Technology(Shandong Academy of Sciences)Jinan 250014China

The pollution of antibiotics commonly existed throughout the entire aquaculture process,but the residues of antibiotics at different aquaculture stages have rarely been *** study investigated the occurrence,distribution and risk assessment of antibiotics at different aquaculture stages (the non-aquaculture stage,the early aquaculture stage,the middle aquaculture stage,and the late aquaculture stage) in two typical marine aquaculture areas(Mahegang River and Dingzi Bay) surrounding the Yellow *** and tetracyclines were commonly used antibiotics in the aquaculture of these areas with high detection frequencies (17%to 83%).Compared among four aquaculture stages,the highest concentration of antibiotics (9032.08 ng/L) in aquaculture ponds was detected at the late aquaculture *** the antibiotic pollution level of natural water was directly related to the aquaculture ***,at the aquaculture stages,the detection frequency of antibiotics in sediments was higher than that at the non-aquaculture *** on the correlation analysis,the concentration of main antibiotics in water showed a positive correlation with total nitrogen (p<0.05) and chlorophyll a (p<0.01),while it showed a negative correlation with salinity (p<0.01) in coastal water of the Dingzi *** to the risk assessment,with the development of aquaculture stages,the selection pressure of fluoroquinolones and tetracyclines on resistant bacteria had *** the ecological risks caused by sulfonamides and tetracyclines to aquatic organisms had also increased ***,this study may provide a reference for formulating regulatory policies regarding antibiotic use at different aquaculture stages.

关键词： Antibiotics Aquaculture stages Correlation analysis Risk assessment

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Z型电荷分离介导的0D/2D AgVO_(3)/TiO_(2)异质结用于增强光催化CO_(2)还原

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Science China Materials 2024年第6期67卷 1820-1829页

作者：王鋙葶蒋娟姚楠左淦丞朱文磊郭秀云鲜啟鸣 State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210023China Jiangsu Engineering Lab of Water and Soil Eco-Remediation School of EnvironmentNanjing Normal UniversityNanjing 210023China Key Laboratory of Chinese Cuisine Intangible Cultural Heritage Technology Inheritance School of Tourism and CuisineYangzhou UniversityYangzhou 225127China

合理利用Z型电荷调节机制是提高光催化CO_(2)还原效率的有效策略.在本工作中,通过将AgVO_(3)量子点(QDs)原位锚定在TiO_(2)纳米片(NSs)上,从而构建了0D/2D AgVO_(3)/TiO_(2)直接Z型异质结光催化剂.TiO_(2)NSs抑制了AgVO_(3)量子点自身... 详细信息

合理利用Z型电荷调节机制是提高光催化CO_(2)还原效率的有效策略.在本工作中,通过将AgVO_(3)量子点(QDs)原位锚定在TiO_(2)纳米片(NSs)上,从而构建了0D/2D AgVO_(3)/TiO_(2)直接Z型异质结光催化剂.TiO_(2)NSs抑制了AgVO_(3)量子点自身的团聚,从而优化了体系的形貌结构.AgVO_(3)QDs增强了复合材料的光吸收能力,从而提高了对太阳光的利用效率.同时,两种单体之间匹配的能带结构和合适的内部界面电场(即(-)AgVO_(3)/(+)TiO_(2))促进了直接Z型异质结的构建,从而显著促进了光生电子-空穴对的分离,并保持了体系中最高的氧化还原电位.优化后的AgVO_(3)/TiO_(2)复合材料在没有任何助催化剂的情况下,表现出具有竞争力的光催化CO_(2)还原效率(CO,47.61μmol h-1g-1),是原始TiO_(2)NSs的20.97倍.本工作提出了一种直接Z型异质结的合理设计方法,为高效光催化CO_(2)还原催化剂的开发提供了指导.

关键词： photocatalytic CO_(2)reduction direct Z-scheme het-erojunction internal interfacial electric field TiO2 nanosheets AgVO_(3)quantum dots

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Selective removal of organic matters from high-salinity chemical industrial wastewater: Ultrafiltration or nanofiltration?

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Water Research 2025年 282卷 123762页

作者： Zhou, Weizhu Chen, Jiansuxuan Dai, Ruobin Wang, Zhiwei State Key Laboratory of Water Pollution Control and Green Resource Recycling Shanghai Institute of Pollution Control and Ecological Security School of Environmental Science and Engineering Tongji University Shanghai 200092 China

The effective separation and treatment of high-salinity chemical industrial wastewater has become a critical issue for the chemical industry. Membrane separation technology, including ultrafiltration (UF) and nanofiltration (NF) membranes, are potential candidates for selectively separating inorganic salts and organic compounds. In this study, we investigated the selective separation performance of real high-salinity chemical industrial wastewater by a series of commercial UF (UF10k, UF5k, UF3k, and UF1k) and NF (NF270, NF90, BSY90, BSY60, BSY30) membranes. UF1k exhibited the best separation performance among the various UF membranes, owing to its lowest molecular weight cut-off (MWCO) of 1 kDa. Further two-pass UF and coagulation-UF cannot effectively improve the separation performance of UF as the presence of low molecule weight organics in the wastewater. Among the NF membranes, we surprisingly found that some NF membranes, despite having smaller pore sizes theoretically, exhibited even lower rejection of organic matters than UF1k in high-salinity environments. Mechanistic investigation revealed that increased salt concentrations led to pore swelling, pore-wall dehydration and charge shielding effects in NF membranes, which resulted in a substantially enlarged MWCO. BSY90, the tightest NF membrane, exhibited the best performance in the rejection of organic compounds from the high-salinity chemical industrial wastewater, owing to its smallest pore size and highest zeta potential. Our findings offer guidance for the proper selection of UF and NF in the precise selective separation of substances in high-salinity chemical industrial wastewater. © 2025 Elsevier Ltd

关键词： Nanofiltration

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