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SSRN 2023年

作者： Yu, Haitao Li, Weiying Zhang, Wei Sun, Shengxin Song, Xin Zhang, Guosheng College of Environmental Science and Engineering Tongji University Shanghai200092 China State Key Laboratory of Pollution Control and Resource Reuse Tongji University Shanghai200092 China Shanghai Institute of Pollution Control and Ecological Security Shanghai200092 China Tongji University China

Microbiological influenced corrosion (MIC) was prevalent in the water supply industry, especially in drinking water distribution system (DWDS) where ferrous materials are the main component. The MIC behaviors for four popular pipe materials (304 stainless steel, 316 stainless steel, Q235 carbon steel, and nodular cast iron) were studied by the dynamic water supply network simulation in the paper. The biomass densities of surface coupons in the experimental period were ranked as follows: nodular cast iron (20562 cells/mm2, ICC) > Q235 carbon steel (8697cells/mm2, ICC) > 316 stainless steel (6350 cells/mm2, ICC) > 304 stainless steel (5520 cells/mm2, ICC). Microbial community structure was mainly influenced by environmental factors, in especial the pipe materials significantly impacted dominant genera inhabited on experimental materials, among which the 316 stainless steel showed the best biostability. Moreover, the profile of polarization resistance and corrosion current exhibited a similar variation tendency, which increased in the first 30 days and then decreased later. The maximum corrosion current of each material was 2.10 × 10-4 A (304SS), 2.70 × 10-4 A (316SS), 2.58 × 10-4 A (Q235 carbon steel), and 1.30 × 10-4 A (nodular cast iron). SEM and XRD results confirmed that the surficial porous corrosion layer controlled the diffusion process of iron corrosion where β-FeOOH and γ-FeOOH were the main components of the corrosion product. Overall, the results of community diversity, electrochemical parameters, and corrosion layer structure showed that 316 stainless steel possessed the best biological corrosion resistance among the four kinds of pipes. © 2023, The Authors. All rights reserved.

关键词： Potable water

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Combined Toxicity of Microplastics with Different Sizes and Lead on Zebrafish Through Gut-Liver and Gut-Brain Axes

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SSRN 2023年

作者： Yu, Jing Chen, Ling Wu, Bing State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University Nanjing210023 China School of Food Science and Pharmaceutical Engineering Nanjing Normal University Nanjing210023 China

Microplastics (MPs) can adsorb heavy metals, inducing combined toxicity to aquatic organisms. However, the combined effects of MPs and heavy metals on gut-liver and gut-brain axes are not fully understood. Thus, the combined effects of polystyrene microplastics (PS-MPs) with two concentrations (20 and 200 μg/L) and three sizes (0.1, 10, and 250 μm) and Pb (50 μg/L) on the gut-liver and gut-brain axes of zebrafish were investigated. Results demonstrated that combined exposures of 0.1 μm PS-MPs and Pb resulted in the most dramatic changes to gut microbial community diversity. The expression of zo-1 and occludin were significantly down-regulated in 0.1 μm and 250 μm PS-MPs combined exposures. The lipopolysaccharide content significantly increased in the liver of 0.1 μm and 250 μm PS-MP combined groups than PS-MPs or Pb alone exposures, indicating impaired gut barrier function. Subsequent studies revealed that 0.1 μm and 250 μm PS-MP combined groups induced liver inflammation through the TLR4/NF-κB pathway. Meanwhile, all exposure groups had an impact on the expression of genes related to bile acid metabolism (cyp7a1, fgf19, abcb11b, and slc10a2) and neurotransmitters (tph1a, tph2, pink, and trh). This study sheds new light on the understanding of the toxicity mechanism of MPs and metal. © 2023, The Authors. All rights reserved.

关键词： Microplastic

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Absorption and Transportation of Nano-Biochar by Plants: Implications for Environmental Fate and Food Chain Risk

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SSRN 2023年

作者： Li, Yuliang Ge, Chenhao Cheng, Cheng Wang, Xiaolei Si, Dunfeng Mu, Chunyi Wang, Min Li, Hongbo Zhou, Dongmei State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China School of Applied Meteorology Nanjing University of Information Science & Technology Nanjing210044 China

Nano-biochar (N-BC) is an emerging nanomaterial with potential applications in various fields. Understanding its behavior in the environment and its interaction with plants is crucial for assessing its ecological implications and potential risks to the food chain. In this study, we investigated the absorption and transportation of N-BC by wheat and Chinese cabbage plants using microscopy techniques and stable isotope analysis. Our results revealed that N-BC particles were readily absorbed by the plants through their root systems and transported to the aboveground tissues. Scanning electron microscopy and transmission electron microscopy provided visual evidence of N-BC particles inside the plants, predominantly located in the xylem and cell walls of the cortical tissue. Stable isotope analysis confirmed the uptake and transportation of N-BC, with elevated isotopic values observed in the plant tissues exposed to 13C-N-BC. Our results demonstrated that around 50.2% - 52.4% of the absorbed N-BC by plants was accumulated in the roots of wheat and Chinese cabbage, and the remaining fraction was transferred to the shoots including steam (31.0% -32.1%) and leaf (16.5% - 17.6%). Importantly, we observed significant accumulation of N-BC in the edible parts of Chinese cabbage, raising concerns about its potential entry into the food chain and associated health risks. These findings highlight the need for further research to explore the specific pathways and modes of N-BC uptake and transport in plants. Monitoring the presence of N-BC in the environment and its potential impact on the food chain is crucial for ensuring food security and safeguarding human health. © 2023, The Authors. All rights reserved.

关键词： Health risks

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Benchmarking Wastewater Discharge Standards, Treatment Technologies and Implications in the Southern Africa Development Community Region, Africa

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SSRN 2024年

作者： Ndiweni, Kwanele Wang, Hongtao UNEP Tongji Institute of Environment for Sustainable Development College of Science and Engineering Tongji University Shanghai200092 China Key Laboratory of Yangtze River Water Environment Ministry of Education State key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai200092 China Shanghai Institute of Pollution Control and Ecological Security Tongji University Shanghai200092 China

Wastewater discharge standards have continual evolved in both spatial and limit stringency in the recent decades, due to realization of linkages between environmental degradation to effluent disposals. We analysed wastewater discharge standards and treatment technologies within the Southern African Development Community (SADC), inland member states. We found that all inland SADC countries have legislated effluent discharge standards for point sources, with a total of 127 parameters across the eleven countries. Analysis revealed high variation, 33.89% standard deviation in the general parameter coverage and on comparative index ranking, only 36.36% occupy third and fourth quartiles within SADC region countries indicating inherent, weak threshold limits and fragmented effluent discharge approaches. In order to achieve discharge regulatory limits and reach Sustainable Development Goals 6 (SDG 6) targets, appropriate technologies for wastewater treatment have to be utilized. Here, we found countries wastewater technologies consist of waste stabilization ponds at approximately 45 – 83.3% and convectional activated sludge plants being remainder. Past performance assessments indicated these wastewater technologies in use by the SADC countries are failing to reach agreed discharge regulatory limits. Hence, our analysis concludes that existing weak operational nexus for wastewater discharge standards and treatment technologies for the region exposes the region to intra-region water pollution transmission. These findings are useful for policy implementors as they bring perspective of need to have regional benchmarks and guidelines for environmental protection strategies. © 2024, The Authors. All rights reserved.

关键词： Wastewater treatment

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Selective Recovery of Rare Earth Elements from Mine Wastewater Using the Magnetic Zeolite Prepared by Rare Earth Tailings

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SSRN 2025年

作者： Zhang, Jianhui Cheng, Jianchen Xu, Guizhou Hou, Xuechao Yu, Zhifei Liu, Wei Zhang, Yalan Chen, Jianxin Yang, Jiahao Wu, Mengting Yang, Wanqing Li, Simin Zhang, Meiyan Chen, Lijun Li, Zhiwen Zhang, Jiaxia Wu, Xinying Wang, Xinyi Xiao, Jinmei Xie, Xianchuan Key Laboratory of Poyang Lake Environment and Resource Utilization Engineering Research Center of Watershed Carbon Neutralization Ministry of Education School of Resource and Environment Nanchang University Nanchang330031 China China Electric Construction Group Jiangxi Electric Power Design Institute Co China State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Nanjing210023 China

The effective enrichment and recovery of rare earth elements (REEs) from wastewater holds significant practical value for both the sustainable utilization of REEs and the restoration of ecological environments. In this study, magnetic zeolite was successfully synthesized by using rare earth tailings (RET) as the raw material, with the addition of Fe3O4 to introduce a magnetic phase. Th magnetic zeolite exhibits high crystallinity, excellent thermal stability, substantial specific surface area of 483.8 m2/g, and rapid adsorption kinetics. The maximum adsorption capacities for La3+ and Ce3+ in aqueous solutions were determined to be 123.2 mg/g and 99.9 mg/g, respectively, with adsorption efficiencies remaining above 70% for La3+ and 80% for Ce3+ after six adsorption *** zeolite was effectively employed to recover REEs from real acid mine wastewater, with La3+ and Ce3+ recoveries exceeding 90%, and distribution coefficients (Kd) of 2681.7 mL/g and 5321.8 mL/g, respectively, demonstrating notable adsorption selectivity. Moreover, the magnetic zeolite can be easily separated using an external magnetic field, addressing the recovery challenges typically associated with conventional zeolite. Overall, through this technology, both the loss of REEs from wastewater and the environmental pollution caused by renewable energy technologies are addressed, thus presenting an effective strategy for simultaneous remediation. © 2025, The Authors. All rights reserved.

关键词： Tailings

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Electric Double Layer Capacitive Adsorption and Faradaic Pseudo-Capacitance Behavior of Znfe-Pani/Cnt Electrode for Phosphate Removal in Capacitive Deionization

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SSRN 2023年

作者： Zhang, Hao Wang, Qiaoying Li, Lexue Huang, Rong Gu, Hongbo Wu, Zhichao Wang, Zhiwei State Key Laboratory of Pollution Control and Resource Reuse Shanghai Institute of Pollution Control and Ecological Security College of Environmental Science and Engineering Tongji University Shanghai200092 China Shanghai Key Lab of Chemical Assessment and Sustainability School of Chemical Science and Engineering Tongji University Shanghai200092 China

Capacitive deionization technology possesses puissant competitiveness in the field of water treatment due to its low cost and high efficiency. In this study, polyaniline (PANI) doped and carboxyl intercalated metal hydroxide composite (ZnFe-PANI/CNT) was developed by a simple co-precipitation method, and used as anode electrode for phosphate removal in sewage. The results show that ZnFe-PANI/CNT electrode can efficiently remove phosphate at concentration of 2–10 mg/L at a wide range of pH (3–10) by electric double layer capacitive adsorption and pseudocapacitive adsorption. The concentration of phosphate in the effluent was as low as 0.095 mg/L, and the coexisting anions (Cl-, NO3-, SO42- and HCO3-) hardly inhibited the phosphate adsorption by ZnFe-PANI/CNT composite electrode. In addition, under the optimal phosphate adsorption conditions (pH=7 and applied voltage of 1.2 V), the energy consumption of CDI system was calculated as low as 0.00274 kWh/g P and 0.017 kWh/m3 water, realizing the expectation of low cost and high efficiency operation. © 2023, The Authors. All rights reserved.

关键词： Costs

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Uptake of graphene enhanced the photophosphorylation performed by chloroplasts in rice plants

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Nano Research 2020年第12期13卷 3198-3205页

作者： Kun Lu Danlei Shen Shipeng Dong Chunying Chen Sijie Lin Shan Lu Baoshan Xing Liang Mao State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing210093China CAS Key Laboratory for Biomedical Effects of Nanomaterials and Nanosafety and CAS Center for Excellence in Nanoscience National Center for Nanoscience and TechnologyBeijing100190China College Environmental Science&Engineering State Key Laboratory of Pollution Control and Resource ReuseTongji UniversityShanghai200092China State Key Laboratory of Pharmaceutical Biotechnology School of Life SciencesNanjing UniversityNanjing210023China Stockbridge School of Agriculture University of MassachusettsAmherstMA01003USA

New and enhanced functions were potentially imparted to the plant organelles after interaction with *** this study,we found that∼44%and∼29%of the accumulated graphene in the rice leaves passively transported to the chloroplasts and thylakoid,respectively,significantly enhanced the fluorescence intensity of chloroplasts,and promoted about 2.4 times higher adenosine triphosphate production than that of *** enhancement of graphene on the photophosphorylation was ascribed to two reasons:One is that graphene facilitates the electron transfer process of photosystem II in thylakoid,and the other is that graphene protects the photosystem II against photo-bleaching by acting as a scavenger of reactive oxygen ***,our work here confirmed that graphene translocating in the thylakoid promoted the photosynthetic activity of chloroplast in vivo and in vitro,providing new opportunities for designing biomimetic materials to enhance the solar energy conversion systems,especially for repairing or increasing the photosynthesis activity of the plants grown under stress environment.

关键词： graphene photophosphorylation enhancement photosystem II ROS scavenging protection

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Synergistic Mechanism of Modified nZVI and Citrobacter Reshaping Sludge Microbiome Drives Co-Removal of HBCD and Nutrients in Municipal Wastewater

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SSRN 2025年

作者： Li, Tianyu He, Yuzhe Zhang, Weixian Peng, Xingxing School of Environmental Science and Engineering Sun Yat-sen University Guangdong Guangzhou510006 China Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology Guangzhou510275 China Tongji University College of Environmental Science & Engineering State Key Lab Pollut Control & Resource Reuse Shanghai Shanghai200092 China

Hexabromocyclododecane (HBCD), a persistent and toxic brominated flame retardant, poses severe ecological and health risks due to its bioaccumulation and endocrine-disrupting effects. Effective removal from wastewater is critical to mitigate risks. Coupling functional microbes with modified nanomaterials represents a robust approach for degrading such recalcitrant organohalides. Based on the research foundation of the functional bacterial strain Citrobacter sp. Y3 and a modified nano-zero-valent iron (nZVI) coupled system, we designed and constructed a novel anaerobic continuous stirred-tank reactor (CSTR) system for the treatment of municipal wastewater in this study. HBCD-contaminated wastewater and actual domestic sewage were fed into this CSTR system. During continuous monitoring of HBCD concentration changes over 360 h, we simultaneously tracked the removal efficiencies of nitrogen (N), phosphorus (P), and chemical oxygen demand (COD). The results demonstrated that the HBCD degradation rate reached 100% within 72 h, while the removal of other nutrients met regulatory discharge requirements. The CSTR system significantly enriched diverse functional bacterial taxa harboring multiple functional genes, including organohalide-respiring bacteria (OHRB) (rdhA/B, PecA/B), iron-reducing bacteria (IRB) (cymA, fur), and nitrogen/phosphorus-removing bacteria (hzoB, haoA, norB and pstA/B/C). Dynamic interactions (synergistic cooperation and competition) among microbial communities drove the decomposition and transformation of pollutants. To our knowledge, this study provides the first demonstration of coupling functional bacteria with modified nanomaterials in activated sludge systems. © 2025, The Authors. All rights reserved.

关键词： Health risks

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Promotional Effect of Doping Aluminum on the Sulfated Fe2o3 Catalyst in Nh3-Scr Reaction

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SSRN 2023年

作者： Wang, Xuping Fang, Siyong Zhang, Lei Ma, Menglan Li, Mingjing Huang, Yangyang Li, Tingzhen Zhang, Liuyi Zou, Weixin Key Laboratory of Water Environment Evolution and Pollution Control in the Three Gorges Reservoir School of Environmental and Chemical Engineering Chongqing Three Gorges University Chongqing404000 China Chongqing Chemical Industry Vocational College Chongqing401220 China State Key Laboratory of Pollution Control and Resource Reuse School of Environment Jiangsu Key Laboratory of Vehicle Emissions Control Nanjing University Nanjing210023 China

FemAlnOx catalysts were synthesized by the co-precipitation method and sulfated by (NH4)2SO4 impregnation method. Among the catalysts, 1.2S/Fe3Al1Ox exhibits more than 90% NO conversion in the range of 260−410 ℃ both in the catalytic activity and the resistance to K poisoning testing. Structures and physicochemical properties of catalysts were measured via different characterization techniques. Through comparative studies between 1.2S/Fe2O3 and 1.2S/Fe3Al1Ox, it is found that doping Al into Fe2O3 can reduce its particle size, increase its specific surface area, and suppress the formation of crystalline phase Fe2(SO4)3 at high calcination temperature, which is propitious to generate more surface sulfates on FemAlnOx. NH3-TPD and in-situ DRIFTS prove that K ions preferentially interact with surface sulfates, and more surface sulfates can provide more Brönsted acid sites to obtain higher ability of resistance to K poisoning. This work provides a simple strategy to improve the catalytic performances of Fe-based catalysts. © 2023, The Authors. All rights reserved.

关键词： Catalyst activity

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Boosted Visible Light Photo-Fenton Degradation of Organic Pollutants Over a Novel Direct Z-Scheme Nh2-Mil-125(Ti)@Feocl Heterojunction Catalyst

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SSRN 2024年

作者： Zelekew, Osman Ahmed He, Lina Ma, Hui Cai, Junyi Wang, Ziqi Wu, Yi-Nan College of Environmental Science and Engineering State Key Laboratory of Pollution Control and Resource Reuse Tongji University 1239 Siping Rd. Shanghai200092 China Shanghai Institute of Pollution Control and Ecological Security 1239 Siping Rd. Shanghai200092 China Department of Materials Science and Engineering Adama Science and Technology University Adama Ethiopia

Improving the charge separation efficiencies and effective utilization plays a crucial role in the photocatalysis system. Herein, we prepared a novel direct Z-scheme NH2-MIL-125(Ti)@FeOCl (Ti-MOF@FeOCl) composite catalyst through a simple method. The prepared composite catalyst was utilized for photo-Fenton degradation of Rhodamine B (RhB) and ciprofloxacin (CIP). The Ti-MOF@FeOCl (10FeTi-MOF) catalyst exhibited the highest catalytic performance and degraded 98.3% and 66% of RhB and CIP, respectively. However, NH2-MIL-125(Ti) and FeOCl catalysts degraded only 50 and 92% of RhB and 50 and 37% of CIP, respectively. The higher catalytic activities of the Ti-MOF@FeOCl composite catalyst could be due to the electronic structure improvements, photoinduced charge separations, and charge transfer abilities in the degradation process. The adsorption and visible light-responsive properties of composite catalysts also enable effective degradation. Furthermore, the electron paramagnetic resonance (EPR) signals, reactive species trapping experiments, and Mott-Schottky (M-S) measurements revealed that the photogenerated superoxide radical (•O2–), hydroxyl radical (•OH), and holes (h+) played crucial roles in the degradation process. The results also demonstrated that the Ti-MOF@FeOCl heterojunction composite catalyst could be a promising photo-Fenton catalyst system for environmental remediation. © 2024, The Authors. All rights reserved.

关键词： Iron compounds

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