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Oxidation Kinetics of Bromophenols by Nonradical Activation of Peroxydisulfate in the Presence of Carbon Nanotube and Formation of Brominated Polymeric Products.
Environ Sci Technol. 2017 Sep 19; 51(18):10718-10728.ES

Abstract

This work demonstrated that bromophenols (BrPs) could be readily oxidized by peroxydisulfate (PDS) activated by a commercial carbon nanotube (CNT), while furfuryl alcohol (a chemical probe for singlet oxygen (1O2)) was quite refractory. Results obtained by radical quenching experiments, electron paramagnetic resonance spectroscopy, and Fourier transform infrared spectroscopy further confirmed the involvement of nonradical PDS-CNT complexes rather than 1O2. Bicarbonate and chloride ion exhibited negligible impacts on BrPs degradation by the PDS/CNT system, while a significant inhibitory effect was observed for natural organic matter. The oxidation of BrPs was influenced by solution pH with maximum rates occurring at neutral pH. Linear free energy relationships (LFERs) were established between the observed pseudo-first-order oxidation rates of various substituted phenols and the classical descriptor variables (i.e., Hammett constant σ+, and half-wave oxidation potential E1/2). Products analyses by liquid chromatography tandem mass spectrometry clearly showed the formation of hydroxylated polybrominated diphenyl ethers and hydroxylated polybrominated biphenyls on CNT surface. Their formation pathway possibly involved the generation of bromophenoxyl radicals from BrPs one-electron oxidation and their subsequent coupling reactions. These results suggest that the novel nonradical PDS/CNT oxidation technology is a good alternative for selectively eliminating BrPs with alleviating toxic byproducts in treated water effluent.

Authors+Show Affiliations

State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology , Harbin, 150090, China.State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology , Harbin, 150090, China.College of Chemical and Environmental Engineering, Harbin University of Science and Technology , Harbin 150040, China.State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology , Harbin, 150090, China.State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology , Harbin, 150090, China.State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology , Harbin, 150090, China.State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology , Harbin, 150090, China.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

28806069

Citation

Guan, Chaoting, et al. "Oxidation Kinetics of Bromophenols By Nonradical Activation of Peroxydisulfate in the Presence of Carbon Nanotube and Formation of Brominated Polymeric Products." Environmental Science & Technology, vol. 51, no. 18, 2017, pp. 10718-10728.
Guan C, Jiang J, Pang S, et al. Oxidation Kinetics of Bromophenols by Nonradical Activation of Peroxydisulfate in the Presence of Carbon Nanotube and Formation of Brominated Polymeric Products. Environ Sci Technol. 2017;51(18):10718-10728.
Guan, C., Jiang, J., Pang, S., Luo, C., Ma, J., Zhou, Y., & Yang, Y. (2017). Oxidation Kinetics of Bromophenols by Nonradical Activation of Peroxydisulfate in the Presence of Carbon Nanotube and Formation of Brominated Polymeric Products. Environmental Science & Technology, 51(18), 10718-10728. https://doi.org/10.1021/acs.est.7b02271
Guan C, et al. Oxidation Kinetics of Bromophenols By Nonradical Activation of Peroxydisulfate in the Presence of Carbon Nanotube and Formation of Brominated Polymeric Products. Environ Sci Technol. 2017 Sep 19;51(18):10718-10728. PubMed PMID: 28806069.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Oxidation Kinetics of Bromophenols by Nonradical Activation of Peroxydisulfate in the Presence of Carbon Nanotube and Formation of Brominated Polymeric Products. AU - Guan,Chaoting, AU - Jiang,Jin, AU - Pang,Suyan, AU - Luo,Congwei, AU - Ma,Jun, AU - Zhou,Yang, AU - Yang,Yi, Y1 - 2017/08/30/ PY - 2017/8/15/pubmed PY - 2017/12/19/medline PY - 2017/8/15/entrez SP - 10718 EP - 10728 JF - Environmental science & technology JO - Environ. Sci. Technol. VL - 51 IS - 18 N2 - This work demonstrated that bromophenols (BrPs) could be readily oxidized by peroxydisulfate (PDS) activated by a commercial carbon nanotube (CNT), while furfuryl alcohol (a chemical probe for singlet oxygen (1O2)) was quite refractory. Results obtained by radical quenching experiments, electron paramagnetic resonance spectroscopy, and Fourier transform infrared spectroscopy further confirmed the involvement of nonradical PDS-CNT complexes rather than 1O2. Bicarbonate and chloride ion exhibited negligible impacts on BrPs degradation by the PDS/CNT system, while a significant inhibitory effect was observed for natural organic matter. The oxidation of BrPs was influenced by solution pH with maximum rates occurring at neutral pH. Linear free energy relationships (LFERs) were established between the observed pseudo-first-order oxidation rates of various substituted phenols and the classical descriptor variables (i.e., Hammett constant σ+, and half-wave oxidation potential E1/2). Products analyses by liquid chromatography tandem mass spectrometry clearly showed the formation of hydroxylated polybrominated diphenyl ethers and hydroxylated polybrominated biphenyls on CNT surface. Their formation pathway possibly involved the generation of bromophenoxyl radicals from BrPs one-electron oxidation and their subsequent coupling reactions. These results suggest that the novel nonradical PDS/CNT oxidation technology is a good alternative for selectively eliminating BrPs with alleviating toxic byproducts in treated water effluent. SN - 1520-5851 UR - https://www.unboundmedicine.com/medline/citation/28806069/Oxidation_Kinetics_of_Bromophenols_by_Nonradical_Activation_of_Peroxydisulfate_in_the_Presence_of_Carbon_Nanotube_and_Formation_of_Brominated_Polymeric_Products_ L2 - https://dx.doi.org/10.1021/acs.est.7b02271 DB - PRIME DP - Unbound Medicine ER -