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Oxidative degradation of chlorpyrifos using ferrate(VI): Kinetics and reaction mechanism.
Ecotoxicol Environ Saf. 2019 Apr 15; 170:259-266.EE

Abstract

In this study, we investigated the degradation kinetics of chlorpyrifos, an organophosphorus (OP) compound, using ferrate(VI), and investigated the potential of this iron-based chemical oxidant on chlorpyrifos removal from water and wastewater treatments. A series of kinetic experiments were conducted to evaluate the influence of various environmental factors, such as pH, oxidant dosages, as well as the presence of anions, cations, humic acid (HA), and different water matrices. Chlorpyrifos was completely removed within 300 s under the following optimum conditions: [chlorpyrifos]0 = 1 μM, [Fe(VI)]0:[chlorpyrifos]0 = 100:1, T = 25 °C, and pH = 7.0. Anions such as Cl-, SO42-, NO3-, and HCO3- and cations such as Fe3+, Cu2+, and NH4+ did not appear to influence the removal of chlorpyrifos. However, the presence of Ca2+, Mg2+, and HA in water inhibited the degradation of chlorpyrifos. Experiments on removing chlorpyrifos from tap water, river water, and synthetic wastewater were performed to demonstrate the practical applications of Fe(VI). Ten oxidation products of chlorpyrifos were identified using liquid chromatography-quadrupole-time-of flight-mass spectrometry (LC-Q-TOF-MS), and their structures were further elucidated using MS/MS spectra. Then, two degradation pathways were preliminarily proposed including the oxidation of the P = S bond, cleavage of C-O bond, and hydroxyl substitution reaction. In general, Fe(VI) could be used as an efficient technology for chlorpyrifos removal from water and wastewater treatments.

Authors+Show Affiliations

State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China; Nanhu College, Jiaxing University, Jiaxing 314001, Zhejiang, PR China.State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China.State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China.State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China.State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China.State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China. Electronic address: jianglj@nju.edu.cn.State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China. Electronic address: wangxinghao@nju.edu.cn.State Key Laboratory of Pollution Control and Resource Reuse, School of Environment, Nanjing University, Nanjing 210023, Jiangsu, PR China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

30529921

Citation

Liu, Hongxia, et al. "Oxidative Degradation of Chlorpyrifos Using ferrate(VI): Kinetics and Reaction Mechanism." Ecotoxicology and Environmental Safety, vol. 170, 2019, pp. 259-266.
Liu H, Chen J, Wu N, et al. Oxidative degradation of chlorpyrifos using ferrate(VI): Kinetics and reaction mechanism. Ecotoxicol Environ Saf. 2019;170:259-266.
Liu, H., Chen, J., Wu, N., Xu, X., Qi, Y., Jiang, L., Wang, X., & Wang, Z. (2019). Oxidative degradation of chlorpyrifos using ferrate(VI): Kinetics and reaction mechanism. Ecotoxicology and Environmental Safety, 170, 259-266. https://doi.org/10.1016/j.ecoenv.2018.11.132
Liu H, et al. Oxidative Degradation of Chlorpyrifos Using ferrate(VI): Kinetics and Reaction Mechanism. Ecotoxicol Environ Saf. 2019 Apr 15;170:259-266. PubMed PMID: 30529921.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Oxidative degradation of chlorpyrifos using ferrate(VI): Kinetics and reaction mechanism. AU - Liu,Hongxia, AU - Chen,Jing, AU - Wu,Nannan, AU - Xu,Xinxin, AU - Qi,Yumeng, AU - Jiang,Lijuan, AU - Wang,Xinghao, AU - Wang,Zunyao, Y1 - 2018/12/06/ PY - 2018/09/17/received PY - 2018/11/23/revised PY - 2018/11/28/accepted PY - 2018/12/12/pubmed PY - 2019/2/14/medline PY - 2018/12/12/entrez KW - Chlorpyrifos KW - Ferrate(VI) KW - Mechanism KW - Products KW - Theoretical calculation SP - 259 EP - 266 JF - Ecotoxicology and environmental safety JO - Ecotoxicol Environ Saf VL - 170 N2 - In this study, we investigated the degradation kinetics of chlorpyrifos, an organophosphorus (OP) compound, using ferrate(VI), and investigated the potential of this iron-based chemical oxidant on chlorpyrifos removal from water and wastewater treatments. A series of kinetic experiments were conducted to evaluate the influence of various environmental factors, such as pH, oxidant dosages, as well as the presence of anions, cations, humic acid (HA), and different water matrices. Chlorpyrifos was completely removed within 300 s under the following optimum conditions: [chlorpyrifos]0 = 1 μM, [Fe(VI)]0:[chlorpyrifos]0 = 100:1, T = 25 °C, and pH = 7.0. Anions such as Cl-, SO42-, NO3-, and HCO3- and cations such as Fe3+, Cu2+, and NH4+ did not appear to influence the removal of chlorpyrifos. However, the presence of Ca2+, Mg2+, and HA in water inhibited the degradation of chlorpyrifos. Experiments on removing chlorpyrifos from tap water, river water, and synthetic wastewater were performed to demonstrate the practical applications of Fe(VI). Ten oxidation products of chlorpyrifos were identified using liquid chromatography-quadrupole-time-of flight-mass spectrometry (LC-Q-TOF-MS), and their structures were further elucidated using MS/MS spectra. Then, two degradation pathways were preliminarily proposed including the oxidation of the P = S bond, cleavage of C-O bond, and hydroxyl substitution reaction. In general, Fe(VI) could be used as an efficient technology for chlorpyrifos removal from water and wastewater treatments. SN - 1090-2414 UR - https://www.unboundmedicine.com/medline/citation/30529921/Oxidative_degradation_of_chlorpyrifos_using_ferrate_VI_:_Kinetics_and_reaction_mechanism_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0147-6513(18)31277-6 DB - PRIME DP - Unbound Medicine ER -