Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/16582
Title: Reaction pathways and kinetics of butylated hydroxyanisole with UV, ozonation, and UV/O3 processes
Authors: Lau, TK
Chu, W 
Graham, N
Keywords: Advanced oxidation process
Butylated hydroxyanisole
Dimerization
Endocrine disruptor
Ozone
Photolysis
Issue Date: 2007
Publisher: IWA Publishing
Source: Water research, 2007, v. 41, no. 4, p. 765-774 How to cite?
Journal: Water research 
Abstract: The chemical degradation of the endocrine disrupting chemical, butylated hydroxyanisole (BHA), was investigated by different treatment processes including ultraviolet (UV) irradiation, ozonation (O3), and UV/O3. O demethylation, dimerization, and oxidation have been found to be the main degradation mechanisms. A systematic decay pathway was proposed based on ten identified intermediates in the studied processes, including a unique pathway leading to the formation of precipitates in the ozonation process. An unconventional minimum-type variation of BHA decay rate constants from acidic to caustic range has been found for both ozonation and UV/O3 processes. The precipitates formed during ozonation can be removed during the process to optimize the treatment, while the UV/O3 process can offer a relatively fast and clean process to degrade BHA and its associated intermediates.
URI: http://hdl.handle.net/10397/16582
ISSN: 0043-1354
EISSN: 1879-2448
DOI: 10.1016/j.watres.2006.11.021
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