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University of Massachusetts Amherst

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2017

Chemical Decomposition

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Full-Text Articles in Engineering

Evaluation Of Disinfection Byproduct Speciation Models Based On Biodegradation And Chemical Decomposition, Xian Ma Jan 2017

Evaluation Of Disinfection Byproduct Speciation Models Based On Biodegradation And Chemical Decomposition, Xian Ma

Environmental & Water Resources Engineering Masters Projects

The USEPA has regulated both chlorinated and brominated trihalomethanes (THMs) and haloacetic acids (HAAs) since Stage 2 D/DBP Rule. Among regulated species, all four chlorinated and brominated THMs are regulated as total TTHMs (TTHM). But of the nine HAAs, only the sum of five (HAA5) are regulated, with no detail on individual species. This leaves four unregulated HAAs of which all contain bromine. With more attention on the brominated haloacetic acids due to their higher toxicity, the focus on the formation of those unregulated brominated species is elevated. The objective of this study is to assess national occurrence of all …