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Comparison of the disinfection by-product formation potential of treated waters exposed to chlorine and monochloramine

By M. M. Bougeard, Emma Harriet Goslan, Bruce Jefferson and Simon A. Parsons

Abstract

The formation of disinfection by-products (DBPs) from chlorination and monochloramination of treated drinking waters was determined. Samples were collected after treatment at 11 water treatment works but before exposure to chlorine or monochloramine. Formation potential tests were carried out to determine the DBPs formed by chlorination and monochloramination. DBPs measured were trihalomethanes (THMs), haloacetic acids (HAAs), halonitromethanes (HNMs), haloacetonitriles (HANs), haloaldehydes (HAs), haloketones (HKs) and iodo-THMs (i-THMs). All waters had the potential to form significant levels of all the DBPs measured. Compared to chlorine, monochloramination generally resulted in lower concentrations of DBPs with the exception of 1,1-dichloropropanone. The concentrations of THMs correlated well with the HAAs formed. The impact of bromine on the speciation of the DBPs was determined. The literature findings that higher bromide levels lead to higher concentrations of brominated DBPS were confirmed

Topics: Disinfection by-products, Trihalomethanes, Haloacetic acids, Haloacetonitriles, Monochloramination, Semi-volatile DBPs
Publisher: Elsevier
Year: 2010
DOI identifier: 10.1016/j.watres.2009.10.008.
OAI identifier: oai:dspace.lib.cranfield.ac.uk:1826/4243
Provided by: Cranfield CERES

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