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Zhang J, Lv S, Yu Q, Liu C, Ma J, Jia M, Fang S. Degradation of sulfamethoxazole in microbubble ozonation process: Performance, reaction mechanism and toxicity assessment. Sep Purif Technol 2023. [DOI: 10.1016/j.seppur.2023.123262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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Tian B, Wu N, Pan X, Wang Z, Yan C, Sharma VK, Qu R. Ferrate(VI) oxidation of bisphenol E-Kinetics, removal performance, and dihydroxylation mechanism. WATER RESEARCH 2022; 210:118025. [PMID: 34991014 DOI: 10.1016/j.watres.2021.118025] [Citation(s) in RCA: 34] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/01/2021] [Revised: 12/23/2021] [Accepted: 12/27/2021] [Indexed: 06/14/2023]
Abstract
Bisphenol E (bis (4-hydroxyphenyl) ethane, BPE), as a typical endocrine disrupting chemical, is commonly detected in source water and drinking water, which poses potential risks to human health and ecological environment. This paper investigated the removal of BPE by ferrate(VI) (FeVIO42-, Fe(VI)) in water. Under the optimal condition of [Fe(VI)]0:[BPE]0 = 10:1 and pH = 8.0, a removal efficiency of 99% was achived in 180 s. Sixteen intermediates of BPE were detected, and four possible reaction pathways were proposed, which mainly involved the reaction modes of double-oxygen and single-oxygen transfer, bond breaking, carboxylation and polymerization. The double-oxygen transfer mechanism, different from traditional mechanisms, was newly proposed to illustrate the direct generation of di-hydroxylated products from parent BPE, which was demonstrated by theoretical calculations for its rationality. Significantly, NO2-, HCO3-, Cu2+, and humic acid, constituents of water promoted the removal of BPE. Additionally, samples from river, tap water, synthetic wastewater, and secondary effluent were tested to explore the feasibility of Fe(VI) oxidation for treating BPE in water. It was found that 99% of BPE was degraded within 300 s in these waters except for synthetic wastewater. The toxicity of BPE and its intermediates was evaluated by ECOSAR program, and the results showed that Fe(VI) oxidation decreased the toxicity of reaction solutions. These findings demonstrated that the Fe(VI) oxidation process was an efficient and green method for the treatment of BPE, and the new insights into the double-oxygen transfer mechanism aid to understand the reaction mechanisms of organic pollutants oxidized by Fe(VI).
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Affiliation(s)
- Bingru Tian
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, China
| | - Nannan Wu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, China
| | - Xiaoxue Pan
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, China
| | - Zunyao Wang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, China
| | - Chao Yan
- School of the Life Sciences, Nanjing University, Nanjing 210023, Jiangsu, China
| | - Virender K Sharma
- Program of Environment and Sustainability, Department of Environmental and Occupational Health, School of Public Health, Texas A&M University, College Station, Texas 77843, United States.
| | - Ruijuan Qu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, Jiangsu, China.
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Peng J, Zhang Y, Zhang C, Miao D, Li J, Liu H, Wang L, Gao S. Removal of triclosan in a Fenton-like system mediated by graphene oxide: Reaction kinetics and ecotoxicity evaluation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 673:726-733. [PMID: 31003100 DOI: 10.1016/j.scitotenv.2019.03.354] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 02/26/2019] [Accepted: 03/22/2019] [Indexed: 06/09/2023]
Abstract
As a typical nanomaterial, graphene oxide (GO) can be easily dispersed in water and may affect the aqueous environment. In this paper, the degradation of triclosan (TCS) in a Fenton-like system Fe3+/H2O2 in GO aqueous solution was investigated. Interestingly, it was observed that GO at low concentration (2.0 mg/L) could exhibit significant catalytic effect on TCS removal. Meanwhile, results of XPS, Raman and TEM spectroscopy suggested the structure and chemical composition of GO did not exhibit significant change after the oxidation process within 30 min. As per the radical quenching experiments and ESR tests, hydroxyl radical (·OH) was mainly responsible for the decomposition of TCS. Further mechanism study indicated that the reaction activation energy (Ea) could be lowered and the production of ·OH be promoted in the presence of GO, respectively. A total of nine intermediates of TCS degradation were detected by TOF-LC-MS after SPE procedure. Finally, ecotoxicity assessment revealed that degradation of TCS by Fe3+/H2O2 system in GO aqueous solution could yield by-products of smaller toxicity compared with parent compounds.
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Affiliation(s)
- Jianbiao Peng
- School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environmental and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Xinxiang 453007, PR China
| | - Yaozong Zhang
- School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environmental and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Xinxiang 453007, PR China
| | - Chaonan Zhang
- School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environmental and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Xinxiang 453007, PR China
| | - Dong Miao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China
| | - Jianhua Li
- Jiangsu Key Laboratory of Chemical Pollution Control and Resources Reuse, School of Environmental and Biological Engineering, Nanjing University of Science and Technology, Nanjing 210094, PR China
| | - Haijin Liu
- School of Environment, Henan Normal University, Key Laboratory for Yellow River and Huai River Water Environmental and Pollution Control, Ministry of Education, Henan Key Laboratory for Environmental Pollution Control, Xinxiang 453007, PR China
| | - Lianhong Wang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China
| | - Shixiang Gao
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, PR China.
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Shad A, Li C, Zuo J, Liu J, Dar AA, Wang Z. Understanding the ozonated degradation of sulfadimethoxine, exploration of reaction site, and classification of degradation products. CHEMOSPHERE 2018; 212:228-236. [PMID: 30145414 DOI: 10.1016/j.chemosphere.2018.08.050] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Revised: 08/09/2018] [Accepted: 08/11/2018] [Indexed: 06/08/2023]
Abstract
Ozonation has been demonstrated to be an efficient method of water treatment. In this study, the degradation of 20 mg/L of sulfadimethoxine (SDM) in different water matrices during ozonation was investigated. At pH 7.0, 100% removal of SDM was achieved by ozonation within 10 min. The degradation of SDM was more pronounced at acidic pH than under ambient environmental conditions, and was also dependent on different water matrices. Both direct and indirect oxidation of SDM by ozone were observed, and it was also shown that both ozone molecules and hydroxyl radicals were involved in the SDM degradation process, whereas it was found that the saturated ring of SDM made it O3-recalcitrant. Seven transformation products (TPs) were identified during SDM ozonation, allowing three degradation pathways to be proposed. Additionally, the main reaction sites, including N (7) and C (2) on the aniline ring, and the __S__N__ bond, were confirmed both experimentally and theoretically. The toxicity evolution during the degradation process was investigated, and the results showed no toxic intermediate products obtained during ozonation.
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Affiliation(s)
- Asam Shad
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Jiangsu, Nanjing, 210023, PR China
| | - Chenguang Li
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Jiangsu, Nanjing, 210023, PR China
| | - Jialiang Zuo
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Jiangsu, Nanjing, 210023, PR China
| | - Jiaoqin Liu
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Jiangsu, Nanjing, 210023, PR China
| | - Afzal Ahmed Dar
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Jiangsu, Nanjing, 210023, PR China
| | - Zunyao Wang
- State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Jiangsu, Nanjing, 210023, PR China.
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Xu X, Chen J, Qu R, Wang Z. Oxidation of Tris (2-chloroethyl) phosphate in aqueous solution by UV-activated peroxymonosulfate: Kinetics, water matrix effects, degradation products and reaction pathways. CHEMOSPHERE 2017; 185:833-843. [PMID: 28735236 DOI: 10.1016/j.chemosphere.2017.07.090] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/11/2017] [Revised: 07/15/2017] [Accepted: 07/17/2017] [Indexed: 06/07/2023]
Abstract
The feasibility of UV-activated peroxymonosulfate (PMS) technology for the degradation of Tris (2-chloroethyl) phosphate (TCEP) in an aqueous solution was investigated in this study. The conditions of [PMS]0: [TCEP]0 = 20:1, T = 25 ± 2 °C and pH = 5.5 ± 0.5 cause a 94.6% removal of TCEP (1 mg L-1) after 30 min of Hg lamp irradiation. The effects of operating parameters (the oxidant doses, pH and presence of typical cations (Fe3+, Cu2+, Ni2+, NH4+), anions (Cl-, HCO3-, NO3-, HPO42-) and humic acid (HA)) were evaluated. It was found that an increase of the PMS dose and the presence of Fe3+ could accelerate the reaction, while the anions and HA inhibited the reaction. Meanwhile, TCEP removal in various water matrices was compared, and the order for TCEP removal was as follows: ultrapure water > tap water > synthetic water > secondary clarifier effluent > Jiuxiang river water. Twenty-two oxidation products were identified using an electrospray time-of-flight mass spectrometer, and the degradation pathways mainly involved radicals' addition and CO bond cleavage. Furthermore, ECOSAR analysis revealed that the intermediate products during the TCEP oxidation process were generally not harmful to three typical aquatic species. Hence, UV/PMS can be used as an efficient technology to treat TCEP-containing water and wastewaters.
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Affiliation(s)
- Xinxin Xu
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Jiangsu, Nanjing, 210023, PR China
| | - Jing Chen
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Jiangsu, Nanjing, 210023, PR China
| | - Ruijuan Qu
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Jiangsu, Nanjing, 210023, PR China.
| | - Zunyao Wang
- State Key Laboratory of Pollution Control and Resources Reuse, School of the Environment, Nanjing University, Jiangsu, Nanjing, 210023, PR China.
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Duan W, Meng F, Lin Y, Wang G. Toxicological effects of phenol on four marine microalgae. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2017; 52:170-176. [PMID: 28432996 DOI: 10.1016/j.etap.2017.04.006] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2016] [Revised: 04/03/2017] [Accepted: 04/06/2017] [Indexed: 06/07/2023]
Abstract
The toxic effects of phenol on four marine microalgae (Dunaliella salina, Platymonas subcordiformis, Phaeodactylum tricornutum Bohlin, and Skeletonema costatum) were evaluated. The 96h EC50 values were 72.29, 92.97, 27.32, and 27.32mgL-1, respectively, which were lower than those values of freshwater microalgae reported in the literature. During a 96-h exposure to a sub-lethal concentration of phenol (1/2 96h EC50) with green alga (D. salina) and diatom (S. costatum), reactive oxygen species (ROS) accumulation, and chlorophyll a (Chl a) content decrease were simultaneously observed in diatom cells after 48h treatment. On the contrary, other chlorophylls in both algae were unaffected. Under transmission electron microscopy (TEM), the phenol-induced ultrastructure alterations included disappearance, or shrinkage, of nucleolus and enlargement of vacuoles, which may result in programmed cell death (PCD). The increase in number of lipid droplets may be related to phenol detoxification. These results indicate that the sensitivity of marine microalgae to phenol was dependent on some biotic factors such as cell size, ROS production, and phenol degradation ability in algal cells.
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Affiliation(s)
- Weiyan Duan
- Key Laboratory for Marine Environment and Ecology of Ministry of Education, Ocean University of China, Qingdao, Shandong Province, PR China
| | - Fanping Meng
- Key Laboratory for Marine Environment and Ecology of Ministry of Education, Ocean University of China, Qingdao, Shandong Province, PR China.
| | - Yufei Lin
- National Marine Hazard Mitigation Service, State Oceanic Administration of China, Beijing, PR China
| | - Guoshan Wang
- National Marine Hazard Mitigation Service, State Oceanic Administration of China, Beijing, PR China
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Sanchirico R, Pinto G, Pollio A, Cordella M, Cozzani V. Thermal degradation of Fenitrothion: identification and eco-toxicity of decomposition products. JOURNAL OF HAZARDOUS MATERIALS 2012; 199-200:390-400. [PMID: 22138175 DOI: 10.1016/j.jhazmat.2011.11.032] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/27/2011] [Revised: 09/30/2011] [Accepted: 11/08/2011] [Indexed: 05/31/2023]
Abstract
The thermal decomposition of Fenitrothion [phosphorothioic acid O,O-diethyl O-(3-methyl-4-nitrophenyl) ester] was investigated. Results obtained by different scale calorimetric techniques show that the thermal decomposition of Fenitrothion involves two main steps. Intermediate and final thermal degradation products formed during isothermal and adiabatic thermal decomposition experiments were identified. The eco-toxicological profile of the decomposition products was assessed experimentally and compared to results obtained with a predictive software (ECOSAR). A specific index was defined to assess the change in ecotoxicity profile of decomposition products with respect to the original compound.
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Affiliation(s)
- Roberto Sanchirico
- Istituto di Ricerche sulla Combustione (CNR), P.le Tecchio, 80, 80125 Napoli, Italy.
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Cordella M, Tugnoli A, Barontini F, Spadoni G, Cozzani V. Inherent safety of substances: Identification of accidental scenarios due to decomposition products. J Loss Prev Process Ind 2009. [DOI: 10.1016/j.jlp.2009.02.015] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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