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Manganese removal by KMnO4: Effects of bicarbonate and the optimum conditions
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 Title & Authors
Manganese removal by KMnO4: Effects of bicarbonate and the optimum conditions
Lee, Yong-Soo; Do, Si-Hyun; Kwon, Young-Eun; Hong, Seong-Ho;
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This study is focused on manganese (Mn(II)) removal by potassium permanganate () in surface water. The effects of bicarbonate on Mn(II) indicated that bicarbonate could remove Mn(II), but it was not effectively. When 0.5 mg/L of Mn(II) was dissolved in tap water, the addition of as much as to Mn(II) ratio is 0.67 satisfied the drinking water regulation for Mn (i.e. 0.05 mg/L), and the main mechanism was oxidation. On the other hand, when the same Mn(II) concentration was dissolved in surface water, the addition of , which was the molar ratio of ranged 0.67 to 0.84 was needed for the regulation satisfaction, and the dominant mechanisms were both oxidation and adsorption. Unlike Mn(II) in tap water, the increasing the reaction time increased Mn(II) removal when was overdosed. Finally, the optimum conditions for the removals of 0.5 - 2.0 mg/L Mn(II) in surface water were both to Mn(II) ratio is 0.67 - 0.84 and the reaction time of 15 min. This indicated that the addition of was the one of convenient and effective methods to remove Mn(II).
Potassium permanganate;Manganese;Surface water;Bicarbonate;
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