Journal
JOURNAL OF HAZARDOUS MATERIALS
Volume 327, Issue -, Pages 153-160Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jhazmat.2016.12.058
Keywords
Microcystin-LR; Disinfection by-products; Haloacetaldehydes; Permanganate; Hydrogen peroxide; Chlorine dioxide
Categories
Funding
- National Natural Science Foundation of China [51578389, 51378366, 51278351]
- National Major Science and Technology Project of China [2014ZX07405-003, 2015ZX07406-004]
- State Key Laboratory of Pollution Control and Resource Reuse Foundation [PCRRE16009]
- Research and Development Project of Ministry of Housing and Urban-Rural Development [2015-K7-028]
- Fundamental Research Funds for the Central Universities
Ask authors/readers for more resources
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), hydrdgen 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 a of tribromoacetald ehyde was produced from the chlorination of MC-LR at Br- =200 g/L. PM and ClO2 pre-oxidation could both reduce the DBP formation from MC-LR. In contrast, H2O2 appeared not to significantly control the DBP formation. (C) 2016 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available