Production of trihalomethanes, haloacetaldehydes and haloacetonitriles during chlorination of microcystin-LR and impacts of pre-oxidation on their formation

Wenhai Chu, Dechang Yao, Yang Deng, Minghao Sui, Naiyun Gao

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

Microcystins (MCs) in drinking water have gained much attention due to their adverse health effects. However, little is known about the impact of pre-oxidation in the formation of disinfection by-products (DBPs) during the downstream chlorination of MCs. The present study examined the formation of both carbonaceous and nitrogenous DBPs from chlorination of MC-LR (the most abundant MC species) and evaluated the impact of permanganate (PM), hydrogen peroxide (H2O2) and chlorine dioxide (ClO2) pre-oxidation on the DBP formation in chlorination. Higher yields of chloroform (CF) (maximum 43.0%) were observed from chlorination of MC-LR than free amino acids which are included in MC-LR structure. Chloral hydrate (CH) and dichloroacetonitrile (DCAN) were also produced from the chlorination of MC-LR, and the latter one was formed probably due to the chlorination of peptide bonds. A high pH favored the production of CF and CH, but inhibited the formation of DCAN. In the presence of bromide, bromo-DBPs could be produced to pose a threat. For example, 0.58 μg/L of tribromoacetaldehyde was produced from the chlorination of MC-LR at Br= 200 μg/L. PM and ClO2pre-oxidation could both reduce the DBP formation from MC-LR. In contrast, H2O2appeared not to significantly control the DBP formation.

Original languageEnglish
Pages (from-to)153-160
Number of pages8
JournalJournal of Hazardous Materials
Volume327
DOIs
StatePublished - 1 Jan 2017

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Trihalomethanes
Chlorination
Halogenation
chlorination
Disinfection
disinfection
Byproducts
oxidation
Microcystins
Oxidation
Chloral Hydrate
Chloroform
Chlorine compounds
chloroform
Hydrates
cyanoginosin LR
Bromides
bromide
Hydrogen peroxide
Potable water

Keywords

  • Chlorine dioxide
  • Disinfection by-products
  • Haloacetaldehydes
  • Hydrogen peroxide
  • Microcystin-LR
  • Permanganate

Cite this

@article{47a033596872473daec749a92c01337f,
title = "Production of trihalomethanes, haloacetaldehydes and haloacetonitriles during chlorination of microcystin-LR and impacts of pre-oxidation on their formation",
abstract = "Microcystins (MCs) in drinking water have gained much attention due to their adverse health effects. However, little is known about the impact of pre-oxidation in the formation of disinfection by-products (DBPs) during the downstream chlorination of MCs. The present study examined the formation of both carbonaceous and nitrogenous DBPs from chlorination of MC-LR (the most abundant MC species) and evaluated the impact of permanganate (PM), hydrogen peroxide (H2O2) and chlorine dioxide (ClO2) pre-oxidation on the DBP formation in chlorination. Higher yields of chloroform (CF) (maximum 43.0{\%}) were observed from chlorination of MC-LR than free amino acids which are included in MC-LR structure. Chloral hydrate (CH) and dichloroacetonitrile (DCAN) were also produced from the chlorination of MC-LR, and the latter one was formed probably due to the chlorination of peptide bonds. A high pH favored the production of CF and CH, but inhibited the formation of DCAN. In the presence of bromide, bromo-DBPs could be produced to pose a threat. For example, 0.58 μg/L of tribromoacetaldehyde was produced from the chlorination of MC-LR at Br−= 200 μg/L. PM and ClO2pre-oxidation could both reduce the DBP formation from MC-LR. In contrast, H2O2appeared not to significantly control the DBP formation.",
keywords = "Chlorine dioxide, Disinfection by-products, Haloacetaldehydes, Hydrogen peroxide, Microcystin-LR, Permanganate",
author = "Wenhai Chu and Dechang Yao and Yang Deng and Minghao Sui and Naiyun Gao",
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Production of trihalomethanes, haloacetaldehydes and haloacetonitriles during chlorination of microcystin-LR and impacts of pre-oxidation on their formation. / Chu, Wenhai; Yao, Dechang; Deng, Yang; Sui, Minghao; Gao, Naiyun.

In: Journal of Hazardous Materials, Vol. 327, 01.01.2017, p. 153-160.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Production of trihalomethanes, haloacetaldehydes and haloacetonitriles during chlorination of microcystin-LR and impacts of pre-oxidation on their formation

AU - Chu, Wenhai

AU - Yao, Dechang

AU - Deng, Yang

AU - Sui, Minghao

AU - Gao, Naiyun

PY - 2017/1/1

Y1 - 2017/1/1

N2 - Microcystins (MCs) in drinking water have gained much attention due to their adverse health effects. However, little is known about the impact of pre-oxidation in the formation of disinfection by-products (DBPs) during the downstream chlorination of MCs. The present study examined the formation of both carbonaceous and nitrogenous DBPs from chlorination of MC-LR (the most abundant MC species) and evaluated the impact of permanganate (PM), hydrogen peroxide (H2O2) and chlorine dioxide (ClO2) pre-oxidation on the DBP formation in chlorination. Higher yields of chloroform (CF) (maximum 43.0%) were observed from chlorination of MC-LR than free amino acids which are included in MC-LR structure. Chloral hydrate (CH) and dichloroacetonitrile (DCAN) were also produced from the chlorination of MC-LR, and the latter one was formed probably due to the chlorination of peptide bonds. A high pH favored the production of CF and CH, but inhibited the formation of DCAN. In the presence of bromide, bromo-DBPs could be produced to pose a threat. For example, 0.58 μg/L of tribromoacetaldehyde was produced from the chlorination of MC-LR at Br−= 200 μg/L. PM and ClO2pre-oxidation could both reduce the DBP formation from MC-LR. In contrast, H2O2appeared not to significantly control the DBP formation.

AB - Microcystins (MCs) in drinking water have gained much attention due to their adverse health effects. However, little is known about the impact of pre-oxidation in the formation of disinfection by-products (DBPs) during the downstream chlorination of MCs. The present study examined the formation of both carbonaceous and nitrogenous DBPs from chlorination of MC-LR (the most abundant MC species) and evaluated the impact of permanganate (PM), hydrogen peroxide (H2O2) and chlorine dioxide (ClO2) pre-oxidation on the DBP formation in chlorination. Higher yields of chloroform (CF) (maximum 43.0%) were observed from chlorination of MC-LR than free amino acids which are included in MC-LR structure. Chloral hydrate (CH) and dichloroacetonitrile (DCAN) were also produced from the chlorination of MC-LR, and the latter one was formed probably due to the chlorination of peptide bonds. A high pH favored the production of CF and CH, but inhibited the formation of DCAN. In the presence of bromide, bromo-DBPs could be produced to pose a threat. For example, 0.58 μg/L of tribromoacetaldehyde was produced from the chlorination of MC-LR at Br−= 200 μg/L. PM and ClO2pre-oxidation could both reduce the DBP formation from MC-LR. In contrast, H2O2appeared not to significantly control the DBP formation.

KW - Chlorine dioxide

KW - Disinfection by-products

KW - Haloacetaldehydes

KW - Hydrogen peroxide

KW - Microcystin-LR

KW - Permanganate

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M3 - Article

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AN - SCOPUS:85008400435

VL - 327

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EP - 160

JO - Journal of Hazardous Materials

JF - Journal of Hazardous Materials

SN - 0304-3894

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