To control bromate (BrO3−) contamination in the water supply, it is necessary to develop a rapid BrO3− removal technology without a post-treatment. In this study, rapid removal of BrO3− from water streams was examined using an electrolytic flow cell. Copper was selected as a working electrode for BrO3− reduction by cyclic voltammetry. The electrolytic flow cell with a layered copper mesh cathode successfully reduced BrO3− to Br− at around neutral pH. BrO3− removal followed the pseudo-first order reaction of BrO3− concentration, and the reaction rate constant based on common logarithm was evaluated to be 0.00224 s−1. Only 3.6 min of contact time was required to decrease BrO3− concentration in tap water from 30 to 10 μg/L without pH control. Thus, the electrochemical process is feasible for rapid removal of BrO3− without post-treatment.
Rapid removal of bromate ion from water streams with an electrolytic flow cell
Naoyuki Kishimoto, Ayana Kishimoto, Akira Nakayama; Rapid removal of bromate ion from water streams with an electrolytic flow cell. Journal of Water Supply: Research and Technology-Aqua 1 March 2012; 61 (2): 103–110. doi: https://doi.org/10.2166/aqua.2012.078
Download citation file: