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Degradation of Taste-and-Odor Compounds and Toxins in Water Supply Source Using Plasma  

Jo, Jin Oh (Department of Chemical and Biological Engineering, Jeju National University)
Kim, Sang Don (Yeongsan River Environment Research Center, National Institute of Environmental Research)
Lim, Byung-Jin (Yeongsan River Environment Research Center, National Institute of Environmental Research)
Hyun, Young Jin (Department of Chemical and Biological Engineering, Jeju National University)
Mok, Young Sun (Department of Chemical and Biological Engineering, Jeju National University)
Publication Information
Applied Chemistry for Engineering / v.24, no.5, 2013 , pp. 518-524 More about this Journal
Abstract
This study investigated the degradation of taste-and-odor compounds and toxins using dielectric barrier discharge plasma. The degradation of taste-and-odor compounds was conducted on geosmin and 2-methyl isoborneol (2-MIB), and the toxins investigated were microcystin-LR (MC-LR), microcystin-RR (MC-RR), microcystin-YR (MC-YR) and anatoxin-a. Largely depending on the type of gas fed to the plasma reactor, the degradation efficiencies of the taste-and-odor compounds decreased in order of oxygen (100%) > dry air (96%) > nitrogen (5%) for geosmin and in order of oxygen (100%) > dry air (94%) > nitrogen (2%) for 2-MIB on the basis of 150 s reaction time. This result suggests that the oxidative reactive species generated during plasma treatment, especially long-lived ozone, are mainly responsible for the degradation of these compounds. When using oxygen as the feed gas, geosmin and 2-MIB were totally degraded within 150 s, microcystins within 10 s, and anatoxin-a within 30 s. It was found that the taste-and-odor compounds and toxins were degraded more rapidly in real lake water than in distilled water.
Keywords
plasma; taste-and-odor compounds; toxins; degradation;
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