[Kinetics on ethanethiol oxidation by potassium permanganate in drinking water].
Reaction kinetics of ethanethiol oxidation with potassium permanganate in water was studied, and the effect of ethanethiol oxidation in raw water under coagulation condition has been investigated. The results showed that the oxidation reaction of ethanethiol by potassium permanganate was very efficient, the removing effect could be more than 90%. The rate of ethanethiol decomposition by potassium permanganate in aqueous solution followed second-order kinetics. When potassium permanganate was excessive, pseudo-first-order rate and concentration of potassium permanganate followed the equation: k' = 0.025 [KMnO4] - 0.008. And then, the second-order reaction rate constant was k = 0.025 L/(min x mg). The removal of ethanethiol in raw water by potassium permanganate under coagulation condition was poorer than in pure water condition, So predicted concentration of potassium permanganate was lower than real concentration.
Liu
Yao
Y
Department of Environmental Science and Engineering, Tsinghua University, Beijing 100084, China. liuyao39@163.com
Zhang
Xiao-Jian
XJ
Dai
Ji-Sheng
JS
Xu
Huan
H
D007700:Kinetics; D010084:Oxidation-Reduction / Q000187:drug effects; D011196:Potassium Permanganate / Q000737:chemistry* / Q000494:pharmacology; D013438:Sulfhydryl Compounds / Q000737:chemistry*; D018508:Water Purification / Q000379:methods*; D014881:Water Supply / Q000032:analysis*
D013438:Sulfhydryl Compounds; D011196:Potassium Permanganate; C007638:ethanethiol