Production of Trihalomethanes, Haloacetaldehydes and Haloacetonitriles during Chlorination of Microcystin-LR and Impacts of Pre-Oxidation on Their Formation

Document Type

Article

Publication Date

1-1-2017

Journal / Book Title

Journal of Hazardous Materials

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.

DOI

10.1016/j.jhazmat.2016.12.058

Published Citation

Chu, W., Yao, D., Deng, Y., Sui, M., & Gao, N. (2017). Production of trihalomethanes, haloacetaldehydes and haloacetonitriles during chlorination of microcystin-LR and impacts of pre-oxidation on their formation. Journal of hazardous materials, 327, 153–160. https://doi.org/10.1016/j.jhazmat.2016.12.058

This document is currently not available here.

Link to Publisher
Link at MSU

Share

COinS