Oxidation of As(III) by potassium permanganate.
The oxidation of As(III) with potassium permanganate was studied under conditions including pH, initial As(III) concentration and dosage of Mn(VII). The results have shown that potassium permanganate was an effective agent for oxidation of As(III) in a wide pH range. The pH value of tested water was not a significant factor affecting the oxidation of As(III) by Mn(VII). Although theoretical redox analyses suggest that Mn(VII) should have better performance in oxidization of As(III) within lower pH ranges, the experimental results show that the oxidation efficiencies of As(III) under basic and acidic conditions were similar, which may be due to the adsorption of As(III) on the Mn(OH)2 and MnO2 resulting from the oxidation of As(III).
Li
Na
N
Department of Civil, Construction and Environmental Engineering, Center for Sustainable Environmental Technology, Iowa State University, Ames, Iowa 50011, USA. nali@iastate.edu
Fan
Maohong
M
Van Leeuwen
Johannes
J
Saha
Basudeb
B
Yang
Hongqun
H
Huang
C P
CP
D001151:Arsenic / Q000737:chemistry*; D016877:Oxidants / Q000737:chemistry*; D010084:Oxidation-Reduction; D011196:Potassium Permanganate / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000737:chemistry*; D018508:Water Purification / Q000379:methods
D016877:Oxidants; D014874:Water Pollutants, Chemical; D011196:Potassium Permanganate; D001151:Arsenic