Formation of regulated and unregulated disinfection byproducts during chlorination and chloramination: Roles of dissolved organic matter type, bromide, and iodide  

作　　者：Yunsi Liu Keqiang Liu Michael J.Plewa Tanju Karanfil Chao Liu 

机构地区：[1]Key Laboratory of Drinking Water Science and Technology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China [2]University of Chinese Academy of Sciences,Beijing 100049,China [3]Water Conservancy Development Research Center,Taihu Basin Authority,Ministry of Water Resources,Shanghai 200433,China [4]Department of Crop Sciences,and the Safe Global Water Institute,University of Illinois at Urbana-Champaign,Urbana,IL 61801,USA [5]Department of Environmental Engineering and Earth Sciences,Clemson University,Anderson,SC 29625,USA

出　　处：《Journal of Environmental Sciences》2022年第7期151-160,共10页环境科学学报（英文版）

基　　金：partially supported by the Key Laboratory of Drinking Water Science and Technology of Chinese Academy of Sciences (No. 20Z01KLDWST)。

摘　　要：Algal blooms and wastewater effluents can introduce algal organic matter(AOM) and effluent organic matter(Ef OM) into surface waters, respectively. In this study, the impact of bromide and iodide on the formation of halogenated disinfection byproducts(DBPs) during chlorination and chloramination from various types of dissolved organic matter(DOM, e.g., natural organic matter(NOM), AOM, and Ef OM) were investigated based on the data collected from literature. In general, higher formation of trihalomethanes(THMs) and haloacetic acids(HAAs) was observed in NOM than AOM and Ef OM, indicating high reactivities of phenolic moieties with both chlorine and monochloramine. The formation of haloacetaldehydes(HALs), haloacetonitriles(HANs) and haloacetamides(HAMs) was much lower than THMs and HAAs. Increasing initial bromide concentrations increased the formation of THMs, HAAs, HANs, and HAMs, but not HALs. Bromine substitution factor(BSF) values of DBPs formed in chlorination decreased as specific ultraviolet absorbance(SUVA) increased. AOM favored the formation of iodinated THMs(I-THMs) during chloramination using preformed chloramines and chlorination-chloramination processes. Increasing prechlorination time can reduce the I-THM concentrations because of the conversion of iodide to iodate, but this increased the formation of chlorinated and brominated DBPs. In an analogous way, iodine substitution factor(ISF) values of I-THMs formed in chloramination decreased as SUVA values of DOM increased. Compared to chlorination, the formation of noniodinated DBPs is low in chloramination.

关 键 词：Disinfection byproducts Natural organic matter Algal organic matter Effluent organic matter BROMIDE IODIDE CHLORINATION CHLORAMINATION 

分 类 号：X703[环境科学与工程—环境工程]