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Formation of brominated disinfection by-products and bromate in cobalt catalyzed peroxymonosulfate oxidation of phenol.
Water Res. 2015 Nov 01; 84:1-7.WR

Abstract

Formation of halogenated disinfection by-products (DBPs) in sulfate radical [Formula: see text] based oxidation processes attracted considerable attention recently. However, the underlying reaction pathways have not been well explored. This study focused on the transformation of Br(-) in cobalt activated peroxymonosulfate (Co(2+)/PMS) oxidation process. Phenol was added as a model compound to mimic the reactivity of natural organic matter (NOM). It was revealed that Br(-) was efficiently transformed to reactive bromine species (RBS) including free bromine and bromine radicals (Br, [Formula: see text] , etc.) in Co(2+)/PMS system. [Formula: see text] played a principal role during this process. RBS thus generated resulted in the bromination of phenol and formation brominated DBPs (Br-DBPs) including bromoform and bromoacetic acids, during which brominated phenols were detected as the intermediates. Br-DBPs were further degraded by excessive [Formula: see text] and transformed to bromate ultimately. Free bromine was also formed in the absence of Co(2+), suggesting Br(-) could be oxidized by PMS per se. Free bromine was incorporated to phenol sequentially leading to Br-DBPs as well. However, Br-DBPs could not be further transformed in the absence of [Formula: see text] . This is the first study that elucidated the comprehensive transformation map of Br(-) in PMS oxidation systems, which should be taken into consideration when PMS was applied to eliminate contamination in real practice.

Authors+Show Affiliations

Department of Environmental Science and Engineering, Nanjing Agricultural University, Nanjing, 210095, China.Department of Environmental Science and Engineering, Nanjing Agricultural University, Nanjing, 210095, China. Electronic address: jhlu@njau.edu.cn.Department of Environmental Science and Engineering, Nanjing Agricultural University, Nanjing, 210095, China.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

eng

PubMed ID

26204226

Citation

Liu, Kuo, et al. "Formation of Brominated Disinfection By-products and Bromate in Cobalt Catalyzed Peroxymonosulfate Oxidation of Phenol." Water Research, vol. 84, 2015, pp. 1-7.
Liu K, Lu J, Ji Y. Formation of brominated disinfection by-products and bromate in cobalt catalyzed peroxymonosulfate oxidation of phenol. Water Res. 2015;84:1-7.
Liu, K., Lu, J., & Ji, Y. (2015). Formation of brominated disinfection by-products and bromate in cobalt catalyzed peroxymonosulfate oxidation of phenol. Water Research, 84, 1-7. https://doi.org/10.1016/j.watres.2015.07.015
Liu K, Lu J, Ji Y. Formation of Brominated Disinfection By-products and Bromate in Cobalt Catalyzed Peroxymonosulfate Oxidation of Phenol. Water Res. 2015 Nov 1;84:1-7. PubMed PMID: 26204226.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Formation of brominated disinfection by-products and bromate in cobalt catalyzed peroxymonosulfate oxidation of phenol. AU - Liu,Kuo, AU - Lu,Junhe, AU - Ji,Yuefei, Y1 - 2015/07/14/ PY - 2015/04/23/received PY - 2015/07/06/revised PY - 2015/07/08/accepted PY - 2015/7/24/entrez PY - 2015/7/24/pubmed PY - 2016/6/2/medline KW - Bromate KW - Brominated disinfection by-products KW - Phenol KW - Reaction pathway KW - Sulfate radical SP - 1 EP - 7 JF - Water research JO - Water Res. VL - 84 N2 - Formation of halogenated disinfection by-products (DBPs) in sulfate radical [Formula: see text] based oxidation processes attracted considerable attention recently. However, the underlying reaction pathways have not been well explored. This study focused on the transformation of Br(-) in cobalt activated peroxymonosulfate (Co(2+)/PMS) oxidation process. Phenol was added as a model compound to mimic the reactivity of natural organic matter (NOM). It was revealed that Br(-) was efficiently transformed to reactive bromine species (RBS) including free bromine and bromine radicals (Br, [Formula: see text] , etc.) in Co(2+)/PMS system. [Formula: see text] played a principal role during this process. RBS thus generated resulted in the bromination of phenol and formation brominated DBPs (Br-DBPs) including bromoform and bromoacetic acids, during which brominated phenols were detected as the intermediates. Br-DBPs were further degraded by excessive [Formula: see text] and transformed to bromate ultimately. Free bromine was also formed in the absence of Co(2+), suggesting Br(-) could be oxidized by PMS per se. Free bromine was incorporated to phenol sequentially leading to Br-DBPs as well. However, Br-DBPs could not be further transformed in the absence of [Formula: see text] . This is the first study that elucidated the comprehensive transformation map of Br(-) in PMS oxidation systems, which should be taken into consideration when PMS was applied to eliminate contamination in real practice. SN - 1879-2448 UR - https://www.unboundmedicine.com/medline/citation/26204226/Formation_of_brominated_disinfection_by_products_and_bromate_in_cobalt_catalyzed_peroxymonosulfate_oxidation_of_phenol_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0043-1354(15)30117-2 DB - PRIME DP - Unbound Medicine ER -