N-nitrosodimethylamine and trihalomethane formation and minimisation in Southeast Queensland drinking water

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Title N-nitrosodimethylamine and trihalomethane formation and minimisation in Southeast Queensland drinking water
Author Knight, Nicole; Watson, Kalinda Jane Lancaster; Farré, Maria José; Shaw, Glendon Reginald
Journal Name Environmental Monitoring and Assessment
Year Published 2012
Place of publication Netherlands
Publisher Springer Netherlands
Abstract This study assesses the prevalence of disinfection by-product (DBP) precursors in some Southeast Queensland drinking water sources by conducting formation potential experiments for the four regulated trihalomethanes (THMs), and the potent carcinogen, N-nitrosodimethylamine (NDMA). NDMA formation potentials were consistently low (<5–21 ng/L), and total THM (tTHM) formation potentials were consistently below the Australian Drinking Water Guideline (250 μg/L). NDMA concentration of finished drinking waters was also monitored and found to be <5 ng/L in all cases. The effect of coagulation and advanced oxidation on the formation of NDMA and THMs is also reported. UV/ H2O2 pre-treatment was effective in producing water with very low THMs concentrations, and UVirradiation was an effective method for NDMA degradation. H2O2 was not required for the observed NDMA degradation to occur. Coagulation using alum, ferric chloride or poly (diallyldimethylammonium chloride) (polyDADMAC) was ineffective in removing DBPs precursors from the source water studied, irrespective of the low dissolved organic carbon (DOC) and dissolved organic nitrogen (DON) attained. Rather, coagulation with polyDADMAC caused an increase in NDMA formation potential upon chloramination, and all coagulants led to an increased tTHM formation potential upon chlorination due to the high bromide concentration of the source water studied.
Peer Reviewed Yes
Published Yes
Alternative URI http://dx.doi.org/10.1007/s10661-011-2256-7
Copyright Statement Copyright 2011 Springer Netherlands. This is an electronic version of an article published in Environmental Monitoring and Assessment, July 2012, Volume 184, Issue 7, pp 4207-4222. Environmental Monitoring and Assessment is available online at: http://link.springer.com/ with the open URL of your article.
Volume 184
Issue Number 7
Page from 4207
Page to 4222
ISSN 0167-6369
Date Accessioned 2012-05-09
Language en_US
Research Centre Australian Rivers Institute
Faculty Faculty of Science, Environment, Engineering and Technology
Subject Analytical Chemistry
URI http://hdl.handle.net/10072/45411
Publication Type Journal Articles (Refereed Article)
Publication Type Code c1

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