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 journalArticleResearchpeer-review

16 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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doi = "10.1016/j.jhazmat.2016.12.058",
language = "English",
volume = "327",
pages = "153--160",
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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 journalArticleResearchpeer-review

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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U2 - 10.1016/j.jhazmat.2016.12.058

DO - 10.1016/j.jhazmat.2016.12.058

M3 - Article

VL - 327

SP - 153

EP - 160

JO - Journal of Hazardous Materials

JF - Journal of Hazardous Materials

SN - 0304-3894

ER -