Formation of iodinated products in Fe (II)/peroxydisulfate (PDS) system

The transformation of iodide (I−) and hypoiodous acid (IO−) by Fe (II)-activated peroxydisulfate (PDS) in the presence of natural organic matter (NOM) was investigated. In the water of a reservoir in Shenzhen, four kinds of organic matter were detected: iodoform > diiodo-bromomethane > dibromo...

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Autores principales:	Zijun Dong, Mu Li, Meifen Chen, Yurong Gu, Chengchun Jiang, Feiyun Sun
Formato:	article
Lenguaje:	EN
Publicado:	IWA Publishing 2021
Materias:	fe (ii) iodide natural organic matter (nom) peroxydisulfate (pds) Water supply for domestic and industrial purposes TD201-500 River, lake, and water-supply engineering (General) TC401-506
Acceso en línea:	https://doaj.org/article/58c4ed89b4f142379c639373d40e8549
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spelling	oai:doaj.org-article:58c4ed89b4f142379c639373d40e85492021-11-06T07:12:08ZFormation of iodinated products in Fe (II)/peroxydisulfate (PDS) system1606-97491607-079810.2166/ws.2020.254https://doaj.org/article/58c4ed89b4f142379c639373d40e85492021-05-01T00:00:00Zhttp://ws.iwaponline.com/content/21/3/1016https://doaj.org/toc/1606-9749https://doaj.org/toc/1607-0798The transformation of iodide (I−) and hypoiodous acid (IO−) by Fe (II)-activated peroxydisulfate (PDS) in the presence of natural organic matter (NOM) was investigated. In the water of a reservoir in Shenzhen, four kinds of organic matter were detected: iodoform > diiodo-bromomethane > dibromo-iodomethane > dichloromethane. As pH increased from 3 to 10, I− conversion rate decreased from 31.0% to 11.0%. There is basically no iodic acid () generated under alkaline conditions, probably due to these organic matters. When PDS concentration is low, PDS can oxidize part of I− to IO−, and the oxidation of I− into reaction and continued oxidation reaction exist at the same time, so some is generated in the system. As the proportion of Fe (II) increases, the generation rate of gradually increases. When Fe2+/PDS is 1:5, 2:5, and 3:5, the conversion rates of are 4.7%, 6.5%, and 8.4%, respectively. There are two main reasons for this: (i) the reaction of IO− produced in the system with humic acid (HA) inhibits the further conversion of IO− to ; (ii) both HA and I- in the system can react with PDS, resulting in a reduction in the oxidation rate of I−. HIGHLIGHTS Formation of I-DBPs by Fe (II)/PDS process in real water was evaluated.; I-DBPs generation in various reaction conditions was examined.; Existence of HA showed apparent inhibition on IO3− generation.;Zijun DongMu LiMeifen ChenYurong GuChengchun JiangFeiyun SunIWA Publishingarticlefe (ii)iodidenatural organic matter (nom)peroxydisulfate (pds)Water supply for domestic and industrial purposesTD201-500River, lake, and water-supply engineering (General)TC401-506ENWater Supply, Vol 21, Iss 3, Pp 1016-1024 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	fe (ii) iodide natural organic matter (nom) peroxydisulfate (pds) Water supply for domestic and industrial purposes TD201-500 River, lake, and water-supply engineering (General) TC401-506
spellingShingle	fe (ii) iodide natural organic matter (nom) peroxydisulfate (pds) Water supply for domestic and industrial purposes TD201-500 River, lake, and water-supply engineering (General) TC401-506 Zijun Dong Mu Li Meifen Chen Yurong Gu Chengchun Jiang Feiyun Sun Formation of iodinated products in Fe (II)/peroxydisulfate (PDS) system
description	The transformation of iodide (I−) and hypoiodous acid (IO−) by Fe (II)-activated peroxydisulfate (PDS) in the presence of natural organic matter (NOM) was investigated. In the water of a reservoir in Shenzhen, four kinds of organic matter were detected: iodoform > diiodo-bromomethane > dibromo-iodomethane > dichloromethane. As pH increased from 3 to 10, I− conversion rate decreased from 31.0% to 11.0%. There is basically no iodic acid () generated under alkaline conditions, probably due to these organic matters. When PDS concentration is low, PDS can oxidize part of I− to IO−, and the oxidation of I− into reaction and continued oxidation reaction exist at the same time, so some is generated in the system. As the proportion of Fe (II) increases, the generation rate of gradually increases. When Fe2+/PDS is 1:5, 2:5, and 3:5, the conversion rates of are 4.7%, 6.5%, and 8.4%, respectively. There are two main reasons for this: (i) the reaction of IO− produced in the system with humic acid (HA) inhibits the further conversion of IO− to ; (ii) both HA and I- in the system can react with PDS, resulting in a reduction in the oxidation rate of I−. HIGHLIGHTS Formation of I-DBPs by Fe (II)/PDS process in real water was evaluated.; I-DBPs generation in various reaction conditions was examined.; Existence of HA showed apparent inhibition on IO3− generation.;
format	article
author	Zijun Dong Mu Li Meifen Chen Yurong Gu Chengchun Jiang Feiyun Sun
author_facet	Zijun Dong Mu Li Meifen Chen Yurong Gu Chengchun Jiang Feiyun Sun
author_sort	Zijun Dong
title	Formation of iodinated products in Fe (II)/peroxydisulfate (PDS) system
title_short	Formation of iodinated products in Fe (II)/peroxydisulfate (PDS) system
title_full	Formation of iodinated products in Fe (II)/peroxydisulfate (PDS) system
title_fullStr	Formation of iodinated products in Fe (II)/peroxydisulfate (PDS) system
title_full_unstemmed	Formation of iodinated products in Fe (II)/peroxydisulfate (PDS) system
title_sort	formation of iodinated products in fe (ii)/peroxydisulfate (pds) system
publisher	IWA Publishing
publishDate	2021
url	https://doaj.org/article/58c4ed89b4f142379c639373d40e8549
work_keys_str_mv	AT zijundong formationofiodinatedproductsinfeiiperoxydisulfatepdssystem AT muli formationofiodinatedproductsinfeiiperoxydisulfatepdssystem AT meifenchen formationofiodinatedproductsinfeiiperoxydisulfatepdssystem AT yuronggu formationofiodinatedproductsinfeiiperoxydisulfatepdssystem AT chengchunjiang formationofiodinatedproductsinfeiiperoxydisulfatepdssystem AT feiyunsun formationofiodinatedproductsinfeiiperoxydisulfatepdssystem
_version_	1718443795744292864

Formation of iodinated products in Fe (II)/peroxydisulfate (PDS) system

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