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SSRN 2024年

作者： Yang, Shuxue Guo, Tao Fu, Heyun Zheng, Shourong Sun, Jingya Qu, Xiaolei State Key Laboratory of Pollution Control and Resource Reuse School of the Environment Nanjing University Jiangsu 210023 China High-tech Institute Suzhou215123 China School of Environmental Science Nanjing XiaoZhuang University Nanjing211171 China

Iodo-phenolic disinfection byproducts (DBPs) widely occur in disinfected water, posing potential risks to human health and the ecosystem as they possess higher toxicity than the bromo- and chloro- analogs. Herein, we elucidated the catalytic hydrodehalogenation (HDH) activity and selectivity of polyiodinated phenolic DBPs on supported noble metal catalysts at ambient conditions. Both 2,4,6-triiodophenol and 4‑chloro‑2,6‑diiodophenol can be efficiently eliminated on Pd/TiO2 and Rh/TiO2 within 20 min, with Pd/TiO2 exhibiting higher turnover frequency. The HDH reactions proceeded in both stepwise and concerted pathways on Pd/TiO2, while they were dominantly stepwise on Rh/TiO2. Experimental results and theoretical calculations revealed that the HDH selectivity depends on the position and the bond energy of halo-substitutions. For the HDH of 2,4,6-triiodophenol, the para-substituted iodine was more favorable to be dehalogenated than the ortho-substituted ones due to the steric hindrance of the hydroxyl group. For the HDH of 4‑chloro‑2,6‑diiodophenol, the ortho-substituted iodine was removed before the para-substituted chlorine as C-I bond had higher reactivity than C-Cl bond. Significant catalyst deactivation was observed for the HDH of 4‑chloro‑2,6‑diiodophenol on Pd/TiO2 due to iodine poisoning, resulting in 4-chlorophenol as the dominant product. In contrast, Rh/TiO2 can completely HDH of 4‑chloro‑2,6‑diiodophenol into cyclohexanone with little iodine poisoning. Our results suggest that HDH is an efficient process for abating iodo-phenolic DBPs. Rh/TiO2 is a more promising HDH catalyst for iodinated DBP removal than Pd/TiO2 with excellent resistance to iodine poisoning. © 2024, The Authors. All rights reserved.

关键词： Catalyst poisoning

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Investigation on the role of ·OH for BPA removal in coastal sediments: The important mediation of low reactivity Fe(II)

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Chemosphere 2024年 353卷 141575页

作者： Yue, Jingyuan Hu, Xiaojin Xie, Huijun Hu, Zhen Wu, Haiming Zhang, Jian Sun, Bo Wang, Lushan Environment Research Institute Shandong University Qingdao266237 China Shandong Provincial Key Laboratory of Water Pollution Control and Resource Reuse Shandong Key Laboratory of Environmental Processes and Health School of Environmental Science and Engineering Shandong University Qingdao266237 China State Key Laboratory of Microbial Technology Institute of Microbial Technology Shandong University Shandong Qingdao266237 China

Bisphenol A (BPA) in seawater tends to be deposited in coastal sediments. However, its degradation under tidal oscillations has not been explored comprehensively. Hydroxyl radicals (·OH) can be generated through Fe cycling under redox oscillations, which have a strong oxidizing capacity. This study focused on the contribution of Fe-mediated production of ·OH in BPA degradation under darkness. The removal of BPA was investigated by reoxygenating six natural coastal sediments, and three redox cycles were applied to prove the sustainability of the process. The importance of low reactivity Fe(II) in the production of ·OH was investigated, specifically, Fe(II) with carbonate and Fe(II) within goethite, hematite and magnetite. The degradation efficiency of BPA during reoxygenation of sediments was 76.78–94.82%, and the contribution of ·OH ranged from 36.74% to 74.51%. The path coefficient of ·OH on BPA degradation reached 0.6985 and the indirect effect of low reactivity Fe(II) on BPA degradation by mediating ·OH production reached 0.5240 obtained via partial least squares path modeling (PLS-PM). This study emphasizes the importance of low reactivity Fe(II) in ·OH production and provides a new perspective for the role of tidal-induced ·OH on the fate of refractory organic pollutants under darkness. © 2024 Elsevier Ltd

关键词： Degradation

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Enhanced treatment of sludge drying condensate by A/O-MBR process: Microbial activity and community structure

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Chemosphere 2023年第1期340卷 139911页

作者： Zhang, Yin Hu, Weijie Lin, Lifeng Bu, Shiying Guan, Zhangqin Zhang, Jie Wang, Qiaoying State Key Laboratory of Pollution Control and Resource Reuse Shanghai Institute of Pollution Control and Ecological Security School of Environmental Science and Engineering Tongji University Shanghai200092 China Co. Ltd Shanghai200092 China Shanghai Zizheng Environmental Technology Co. Ltd Shanghai200086 China

With the rapid increase of sludge production from sewage treatment plants, the treatment of sludge drying condensate rich in a large amount of pollutants urgently needs to be addressed. Due to the unique characteristics of sludge drying condensate (high ammonia nitrogen and COD concentration), there are almost no reports on biological treatment methods specifically targeting sludge drying condensate. In this study, A/O-MBR process was proposed for sludge drying condensate treatment and the effects of ammonia nitrogen loads, alkalinity and aeration intensity were explored. Experimental results show that under the ammonia nitrogen load of 0.35 kg NH4+-N/(m3·d) and the aeration intensity of 0.5 m3/(m2·min), the removal rate of COD and NH4+-N could reach 94% and 99.86% with the addition of alkalinity (m(NaHCO3): m(NH4+-N) = 7:1), respectively. The distribution of living and dead microbial cells in the activated sludge of three reactors also proved that the supplement of alkalinity in the influent can ensure the feasible living conditions for microorganisms. In addition to traditional nitrifying bacteria, through the supplementation of alkalinity and the reduction of aeration intensity, the system had also domesticated high abundance heterogeneous nitrification aerobic denitrification (HN-AD) and aerobic denitrification bacteria (both more than 10% of the total bacterial count). The denitrification process of sludge drying condensate was simplified and the denitrification efficiency was greatly improved. The findings of this study could provide important theoretical guidance for the biological treatment process of sludge drying condensate. © 2023 Elsevier Ltd

关键词： Nitrification

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Simultaneous Removal of Cr, Cu, Zn and Cd by Nano Zero-Valent Iron Modified Sludge Biochar in High Salinity Wastewater

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SSRN 2024年

作者： Zhao, Shirong Li, Qian Tang, Zheng Yang, Yan Gao, Pin Qian, Yajie Chen, Jiabin Xue, Gang College of Environmental Science and Engineering Donghua University Shanghai201620 China State Key Laboratory for Modification of Chemical Fibers and Polymer Materials Donghua University Shanghai201620 China State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai200092 China

Cr, Cd, Zn and Cu commonly coexisted in the electroplating wastewater with high salinity and organics, while their removal was often investigated individually. In this study, the simultaneous removal of Cr, Cd, Zn and Cu was investigated by nano zero-valent iron modified sludge biochar (nZVI@SBC). The results show that nZVI@SBC could significantly improve the removal efficiency of the four heavy metals (HMs) in high salinity wastewater. NO3- (N-NO3-) and humic acid (HA) could promote the removal of Cr, Cd, Zn and Cu, and PO43- (P-PO43-) could enhance the removal of Cd. EPR analysis indicated the generation of 1O2 in different water matrices. The 1O2 intensity was increased in the presence of NO3- and HA, which accelerated the corrosion of nZVI and promoted the electron transfer in the system. To further understand the reaction mechanism, the variation of nZVI@SBC structures and compositions during the treatment process were characterized by SEM-EDS, XRD, BET and XPS. Cr and Cu were removed through adsorption and co-precipitation after reduction by nZVI, while Cd and Zn were removed by alkali precipitation and complexation. This work improves the understanding of simultaneous removal of HMs by nZVI@SBC and provides a cost-effective approach for the high-salinity organic electroplating wastewater treatment. © 2024, The Authors. All rights reserved.

关键词： Cost effectiveness

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Combination of suspect and nontarget screening with exposure assessment for per- and polyfluoroalkyl substance prioritization in Chinese municipal wastewater

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Environment International 2025年 198卷 109384页

作者： Mu, Hongxin Chen, Ling Zhou, Rong Gu, Luyao Yu, Yue Tang, Jin Zhang, Houhu Ren, Hongqiang Wu, Bing Bu, Yuanqing Research Center of Solid Waste Pollution and Prevention Nanjing Institute of Environmental Science Ministry of Ecology and Environment Nanjing210042 China State Key Laboratory of Pollution Control and Resource Reuse School of Environment Nanjing University Nanjing210023 China School of Environmental Science and Engineering Nanjing University of Information Science and Technology 219 Ningliu Road Nanjing210044 China

Municipal wastewater treatment plants (WWTPs) are significant sources of per- and polyfluoroalkyl substances (PFASs) in aquatic environments, making their identification and priority rank crucial for risk control. Wastewater samples were collected from 148 municipal WWTPs in China to determine the occurrence and risk prioritization of PFASs. A total of 61 PFASs were identified, including 14 legacy and 47 emerging PFASs, using machine learning prediction-enhanced suspect and nontarget screening techniques. PFASs were detected in all wastewater samples, with perfluorocarboxylic acid (PFCA), perfluorosulfonic acid (PFSA), fluoromeric sulfonic acid (FTSA), and perfluoroalkyl sulfonamide-like (PFSM) substances being the predominant classes. The exposure loads of legacy and emerging PFASs to the Chinese population were 71.8 and 52.9 μg·day−1·people−1, respectively, and textile and clothing products might be the primary PFAS exposure pathways. Through a risk prioritization method integrating toxicity and exposure data, ten legacy and five emerging PFASs were flagged as high-priority substances requiring additional attention. As the PFAS risk removal efficiency by conventional biological treatment processes was only 0.7 %, the PFAS risk priority patterns in influent and effluent were similar (r = 0.86, p © 2025 The Author(s)

关键词： Wastewater treatment

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Removal Behavior of Typical Micropollutants in Membrane Bioreactor Process by Different Temperature

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SSRN 2023年

作者： Wang, Qiaoying Zheng, Wenjia Wang, Yan Zhang, Tong Zhou, Zhen Wu, Zhichao 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 College of Environmental and Chemical Engineering Shanghai Institute of Pollution Control and Ecological Security Shanghai University of Electric Power Shanghai200090 China

In this study, the removal efficiency and mechanism of 8 kinds of typical micropollutants by membrane bioreactor (MBR) at different temperatures (15, 25 and 35 °C) were investigated. MBR exhibited the high removal rate (> 85%) for 3 kinds of industrial synthetic organic micropollutants (i.e. bisphenol A (BPA), 4-tert-octylphenol (TB) and 4-n-nonylphenol (NP)) with similar functional groups, structures and high hydrophobicity (Log D > 3.2). However, the removal rates of ibuprofen (IBU), carbamazepine (CBZ) and sulfamethoxazole (SMX) with pharmaceutical activity showed great discrepancy (i.e. 93%, 14.2% and 29%, respectively), while that of pesticides (i.e. acetochlor (Ac) and 2,4-dichlorophenoxy acetic acid (2,4-D) were both lower than 10%. Operating temperature played a significant role in microbial growth and activities. High temperature (35 °C) led to a decreased removal efficiency for most of hydrophobic organic micropollutants, and was also not conducive for refractory CBZ due to the temperature *** lower temperature (15 °C), a large amount of exopolysaccharides and proteins were released by microorganisms, which caused the inhibited microbial activity, poor flocculation and sedimentation, resulting in the polysaccharide-type membrane fouling. It was proved that dominant microbial degradation and auxiliary adsorption were the main mechanisms for micropollutant removal in MBR system. Therefore, 25 °C was most conductive for micropollutant removal due to the high activity sludge so as to enhance microbial adsorption and degradation. © 2023, The Authors. All rights reserved.

关键词： Bioreactors

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Responses of dissolved organic nitrogen to varied nitrogen deposition: A 16-year nitrogen-addition and cessation experiment in a subtropical forest

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Science of the Total Environment 2025年 975卷 179284页

作者： Yang, Dongxing Xie, Dani Mulder, Jan Yu, Qian Huang, Yongmei Duan, Lei State Key Laboratory of Regional Environment and Sustainability School of Environment Tsinghua University Beijing100084 China Shanxi Key Laboratory of Land Consolidation School of Land Engineering Chang'an University Shanxi 710064 China Faculty of Environmental Sciences and Natural Resource Management Norwegian University of Life Sciences Box 5003 ÅsNO-1432 Norway State Key Laboratory of Pollution Control and Resource Reuse and School of the Environment Nanjing University 163 Xian in Ave. Jiangsu Nanjing210023 China Faculty of Geographical Science Beijing Normal University Beijing100875 China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Tsinghua University Beijing100084 China

The leaching of dissolved organic nitrogen (DON) signals N loss in forest ecosystems, connecting terrestrial and aquatic ecosystems. The response of DON to varied inorganic N (Nin) deposition remains unclear. A 16-year continuous monitoring of DON in throughfall, soil water, and stream water was conducted under a field N manipulation (10-year Nin addition and subsequent cessation of Nin addition) in a subtropical forest in China. Under reference conditions, the average organic N (Nor) deposition was 23.0 ± 4.9 kg N ha−1 yr−1, with approximately one-third leaching at a soil depth of 30 cm, a value that was higher than those reported for temperate forests. Over a 16-year period, DON concentrations tended to increase in throughfall, soil solutions and stream water. The long-term increase in DON concentrations in soil solutions was primarily driven by increasing Nor deposition and indirectly influenced by decreasing acid deposition. Due to a doubling of monthly Nin input, either as sodium nitrate or as ammonium nitrate, the soil DON leaching doubled, causing the soil to transition from a DON sink to a DON source. After Nin addition ceased, the DON leaching returned to natural levels, and the soil reverted to being a DON sink. This study reveals the importance of Nor deposition and decreasing acid deposition as drivers of long-term trends in DON concentrations in soil solutions, in addition to elucidating the response patterns of DON to increasing and decreasing Nin deposition. © 2025 Elsevier B.V.

关键词： Chronic nitrogen addition Dissolved organic nitrogen Nitrogen deposition Soil acidification recovery Water chemistry

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Enhancing Efficient Reclaim of Phosphorus from Simulated Urine by Magnesium-Functionalized Biochar: Adsorption Behaviors, Molecular-Level Mechanistic Explanations and its Potential Application

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SSRN 2023年

作者： Zhang, Lei Yang, Libin Chen, Jiabin Zhang, Yalei Zhou, Xuefei State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and Engineering Tongji University Shanghai200092 China Key Laboratory of Yangtze Water Environment Ministry of Education Tongji University Shanghai200092 China Shanghai Institute of Pollution Control and Ecological Security Tongji University Shanghai200092 China

Magnesium-functionalized Magnolia grandiflora Linn leaf-derived biochar (MBC) capable of efficiently reclaiming phosphorus from urine was synthesized by slow co-pyrolysis. Four adsorption kinetic and seven adsorption isotherm models were fitted to the batch adsorption and desorption experimental data, and it was found that pseudo-first-order kinetic model and multilayer model with saturation best described the phosphate-phosphorus (PO43-P) adsorption process by MBC. MBC and phosphorus-saturated MBC (P-MBC) were found to offer outstanding phosphorus adsorption and slow release properties, respectively. Based on material characterization, statistical physics, adsorption energy distribution and statistical thermodynamics, a multi-ionic, inclined orientation, entropy-driven spontaneous endothermic process of MBC on PO43-P was proposed, involving physicochemical interactions (porous filling, electrostatic attraction, ligand exchange and surface precipitation). Further, seed germination and early seedling growth experiments proved that P-MBC can be used as a slow-release fertilizer. Overall, MBC offers prospective applications as an efficient phosphorus adsorbent and then as a slow-release fertilizer. © 2023, The Authors. All rights reserved.

关键词： Magnesium

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Rapid oxidation of black phosphorus induced by copper ions via promoting oxygen bonding and phosphate desorption

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National Science Open 2024年第5期3卷 100-113页

作者： Zhiyu Zhu Sha Yang Kun Lu Shipeng Dong Xiaoyan Sun Jieyin Zheng Shixiang Gao Wei Liu Liang Mao State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentChemistry and Biomedicine Innovation CenterNanjing UniversityNanjing 210093China Nano Structural Materials Center School of Materials Science and EngineeringNanjing University of Science and TechnologyNanjing 210094China School of Environmental Science and Engineering Zhejiang Gongshang UniversityHangzhou 310018China Nanjing Qixia District Hospital Nanjing 210046China Cambridge A-Level Centre Nanjing Jinling High SchoolNanjing 210005China

Black phosphorus(BP)has garnered significant interest in the field of biomedicine because of its exceptional *** oxidation product of BP phosphate has been utilized in numerous studies for the purpose of repairing bone defects and inducing apoptosis and autophagy in cancer ***,this process has drawbacks in terms of low yield and a slow rate of phosphate *** this study,we found that the oxidation rate of BP was increased 120-fold and the yield proportion of phosphate BP product was increased from 30%to 85%with the presence of less than 0.1%copper ions(Cu^(2+))in the reaction *** enhancement was attributed to the fact that the presence of Cu^(2+)promoted the bonding of oxygen on the BP surface and then the desorption of phosphate molecules from the BP *** study offers a novel perspective on the process of BP oxidation and introduces innovative concepts for the development of biological drug delivery systems capable of rapid decomposition.

关键词： black phosphorus reaction pathway reaction efficiency copper ions reaction mechanism

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Recent progress of radionuclides separation by porous materials

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Science China Chemistry 2024年第11期67卷 3515-3577页

作者： Yinghui Xie Long Yu Long Chen Cheng Chen Li Wang Fenglei Liu Yun Liao Peng Zhang Tao Chen Yihui Yuan Yuexiang Lu Boyang Huang Hui Yang Suhua Wang Shuao Wang Lijian Ma Feng Luo Yunhai Liu Baowei Hu Hongqing Wang Duoqiang Pan Wenkun Zhu Ning Wang Zhe Wang Liang Mao Shengqian Ma Xiangke Wang Guangdong Provincial Key Laboratory for Green Agricultural Production and Intelligent Equipment School of Environmental Science and EngineeringGuangdong University of Petrochemical TechnologyMaoming 525000China School of Life Science Shaoxing UniversityShaoxing 312000China College of Environmental Science and Engineering North China Electric Power UniversityBeijing 102206China State Key Laboratory of Radiation Medicine and Protection School for Radiological and Interdisciplinary Sciences(RAD-X)and Collaborative Innovation Center of Radiation Medicine of Jiangsu Higher Education InstitutionsSoochow UniversitySuzhou 215123China College of Chemistry Sichuan UniversityChengdu 610064China School of Chemistry and Materials Science East China University of TechnologyNanchang 330013China School of Chemistry and Chemical Engineering University of South ChinaHengyang 421001China Frontiers Science Center for Rare Isotopes Lanzhou UniversityLanzhou 730000China State Key Laboratory of Environment-friendly Energy Materials National Co-innovation Center for Nuclear Waste Disposal and Environmental SafetySichuan Civil-military Integration InstituteSchool of National Defence&Nuclear Science and TechnologySouthwest University of Science and TechnologyMianyang 621010China State Key Laboratory of Marine Resource Utilization in South China Sea Collaborative Innovation Center of Marine Science and TechnologyHainan UniversityHaikou 570228China Institute of Nuclear and New Energy Technology Tsinghua UniversityBeijing 100084China State Key Laboratory of Pollution Control and Resource Reuse School of the EnvironmentNanjing UniversityNanjing 210093China Department of Chemistry University of North TexasDentonTX 76201USA

The separation of radionuclides is critical for the sustainable development of nuclear energy. It is urgent to design and prepare functionalized materials for efficient radionuclides separation. Porous materials are considered excellent candidates for the separation of radionuclides under complex conditions due to their high specific surface areas, tunable pore structures and controllable functionalities. In this review, we summarized the design, preparation and functionalization of porous materials and their application for separation of radionuclides in the past five years, discussed the separation performance and analyzed the structure-activity relationship between various radionuclides and porous materials, and systematically clarified their characterization and mechanism of different type porous materials. We also introduced the detection, irradiation and chemical toxicity of different reflective radionuclides.

关键词： porous materials radionuclides detection separation radiotoxicity interaction mechanism

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