AWWA JAW59344

This article is a comprehensive study of the effectiveness of several arsenic (As) oxidizing agents and will be of use to utilities needing to oxidize arsenite [As(III)] before removal. As(III) is a form of As poorly removed by most removal technologies, but can be efficiently removed using common oxidants such as chlorine, permanganate, and ozone. The authors undertook this research in response to an acute lack of information on the effectiveness of commonly used oxidants under various environmental conditions for As(III) oxidation. This research may help utilities meet regulatory compliance for arsenic by converting As(III)-contaminated waters to a form readily removed by most treatment technologies. Utilities can directly apply the information in this article by choosing an appropriate oxidant based on the composition of their source water. Includes 20 references, tables, figures.