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Effect of iodide on transformation of phenolic compounds by nonradical activation of peroxydisulfate in the presence of carbon nanotube: Kinetics, impacting factors, and formation of iodinated aromatic products.
Chemosphere. 2018 Oct; 208:559-568.C

Abstract

Our recent study has demonstrated that iodide (I-) can be easily and almost entirely oxidized to hypoiodous acid (HOI) but not to iodate by nonradical activation of peroxydisulfate (PDS) in the presence of a commercial carbon nanotube (CNT). In this work, the oxidation kinetics of phenolic compounds by the PDS/CNT system in the presence of I- were examined and potential formation of iodinated aromatic products was explored. Experimental results suggested that I- enhanced the transformation of six selected substituted phenols, primarily attributed to the generation of HOI that was considerably reactive toward these phenolic compounds. More significant enhancement was obtained at higher I- concentrations or lower pH values, while the change of PDS or CNT dosages exhibited a slight impact on the enhancing effect of I-. Product analyses with liquid chromatography tandem mass spectrometry clearly revealed the production of iodinated aromatic products when p-hydroxybenzoic acid (p-HBA, a model phenol) was treated by the PDS/CNT/I- system in both synthetic and real waters. Their formation pathways probably involved the substitution of HOI on aromatic ring of p-HBA, as well as the generation of iodinated p-HBA phenoxyl radicals and subsequent coupling of these radicals. Given the considerable toxicity and harmful effects of these iodinated aromatic products, particular attention should be paid when the novel PDS/CNT oxidation technology is applied for treatment of phenolic contaminants in iodide-containing waters.

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. Electronic address: jiangjinhit@126.com.School of Municipal and Environmental Engineering, Jilin Jianzhu University, Changchun 130118, China.School of Municipal and Environmental Engineering, Shandong Jianzhu University, Jinan, 250010, 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

29890494

Citation

Guan, Chaoting, et al. "Effect of Iodide On Transformation of Phenolic Compounds By Nonradical Activation of Peroxydisulfate in the Presence of Carbon Nanotube: Kinetics, Impacting Factors, and Formation of Iodinated Aromatic Products." Chemosphere, vol. 208, 2018, pp. 559-568.
Guan C, Jiang J, Pang S, et al. Effect of iodide on transformation of phenolic compounds by nonradical activation of peroxydisulfate in the presence of carbon nanotube: Kinetics, impacting factors, and formation of iodinated aromatic products. Chemosphere. 2018;208:559-568.
Guan, C., Jiang, J., Pang, S., Luo, C., Yang, Y., Ma, J., Yu, J., & Zhao, X. (2018). Effect of iodide on transformation of phenolic compounds by nonradical activation of peroxydisulfate in the presence of carbon nanotube: Kinetics, impacting factors, and formation of iodinated aromatic products. Chemosphere, 208, 559-568. https://doi.org/10.1016/j.chemosphere.2018.06.019
Guan C, et al. Effect of Iodide On Transformation of Phenolic Compounds By Nonradical Activation of Peroxydisulfate in the Presence of Carbon Nanotube: Kinetics, Impacting Factors, and Formation of Iodinated Aromatic Products. Chemosphere. 2018;208:559-568. PubMed PMID: 29890494.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Effect of iodide on transformation of phenolic compounds by nonradical activation of peroxydisulfate in the presence of carbon nanotube: Kinetics, impacting factors, and formation of iodinated aromatic products. AU - Guan,Chaoting, AU - Jiang,Jin, AU - Pang,Suyan, AU - Luo,Congwei, AU - Yang,Yi, AU - Ma,Jun, AU - Yu,Jing, AU - Zhao,Xi, Y1 - 2018/06/04/ PY - 2018/03/27/received PY - 2018/05/29/revised PY - 2018/06/03/accepted PY - 2018/6/12/pubmed PY - 2018/8/23/medline PY - 2018/6/12/entrez KW - Carbon nanotubes KW - Iodide KW - Iodinated aromatic products KW - Peroxydisulfate KW - Phenolic compounds SP - 559 EP - 568 JF - Chemosphere JO - Chemosphere VL - 208 N2 - Our recent study has demonstrated that iodide (I-) can be easily and almost entirely oxidized to hypoiodous acid (HOI) but not to iodate by nonradical activation of peroxydisulfate (PDS) in the presence of a commercial carbon nanotube (CNT). In this work, the oxidation kinetics of phenolic compounds by the PDS/CNT system in the presence of I- were examined and potential formation of iodinated aromatic products was explored. Experimental results suggested that I- enhanced the transformation of six selected substituted phenols, primarily attributed to the generation of HOI that was considerably reactive toward these phenolic compounds. More significant enhancement was obtained at higher I- concentrations or lower pH values, while the change of PDS or CNT dosages exhibited a slight impact on the enhancing effect of I-. Product analyses with liquid chromatography tandem mass spectrometry clearly revealed the production of iodinated aromatic products when p-hydroxybenzoic acid (p-HBA, a model phenol) was treated by the PDS/CNT/I- system in both synthetic and real waters. Their formation pathways probably involved the substitution of HOI on aromatic ring of p-HBA, as well as the generation of iodinated p-HBA phenoxyl radicals and subsequent coupling of these radicals. Given the considerable toxicity and harmful effects of these iodinated aromatic products, particular attention should be paid when the novel PDS/CNT oxidation technology is applied for treatment of phenolic contaminants in iodide-containing waters. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/29890494/Effect_of_iodide_on_transformation_of_phenolic_compounds_by_nonradical_activation_of_peroxydisulfate_in_the_presence_of_carbon_nanotube:_Kinetics_impacting_factors_and_formation_of_iodinated_aromatic_products_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(18)31093-2 DB - PRIME DP - Unbound Medicine ER -