Relationships between regulated DBPs and emerging DBPs of health concern in U.S. drinking water

查看全文 作　　者：Stuart [1]W.Krasner;Ai [1]Jia;Chih-Fen [1]T.Lee;Raha [1]Shirkhani;Joshua [2]M.Allen;Susan [2]D.Richardson;Michael [3,4]J.Plewa

机构地区：[1]Metropolitan Water District of Southern California,Water Quality Laboratory,CA 91750,USA;[2]Department of Chemistry and Biochemistry,University of South Carolina,SC 29208,USA;[3]Department of Crop Sciences,University of Illinois at Urbana-Champaign,IL 61801,USA;[4]Safe Global Water Institute,University of Illinois at Urbana-Champaign,IL 61801,USA

出　　处：《Journal of Environmental Sciences》索引2022年第34卷第7期,共12页

基　　金：funding from the National Science Foundation (CBET 1705206 and 1706862)。 摘　　要：A survey was conducted at eight U.S. drinking water plants, that spanned a wide range of water qualities and treatment/disinfection practices. Plants that treated heavily-wastewaterimpacted source waters had lower trihalomethane to dihaloacetonitrile ratios due to the presence of more organic nitrogen and HAN precursors. As the bromide to total organic carbon ratio increased, there was more bromine incorporation into DBPs. This has been shown in other studies for THMs and selected emerging DBPs(HANs), whereas this study examined bromine incorporation for a wider group of emerging DBPs(haloacetaldehydes, halonitromethanes). Moreover, bromine incorporation into the emerging DBPs was, in general, similar to that of the THMs. Epidemiology studies that show an association between adverse health effects and brominated THMs may be due to the formation of brominated emerging DBPs of heath concern. Plants with higher free chlorine contact times before ammonia addition to form chloramines had less iodinated DBP formation in chloraminated distribution systems, where there was more oxidation of the iodide to iodate(a sink for the iodide) by the chlorine. This has been shown in many bench-scale studies(primarily for iodinated THMs), but seldom in full-scale studies(where this study also showed the impact on total organic iodine. Collectively, the THMs, haloacetic acids, and emerging DBPs accounted for a significant portion of the TOCl, TOBr, and TOI;however, ~50% of the TOCl and TOBr is still unknown. The correlation of the sum of detected DBPs with the TOCl and TOBr suggests that they can be used as reliable surrogates. 关键词：Disinfection by-products Total organic bromine Total organic iodine TRIHALOMETHANES Haloacetonitriles Haloacetaldehydes Iodo-trihalomethanes Iodoacetic acids

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Relationships between regulated DBPs and emerging DBPs of health concern in U.S. drinking water

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