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HERO ID
8649952
Reference Type
Journal Article
Title
Potassium permanganate combined contact oxidation filter: Effect of hardness on start-up and manganese removal
Author(s)
Sun, C; Yang, H; Liang, H; Li, G
Year
2020
Is Peer Reviewed?
Yes
Journal
Huanjing Kexue Xuebao / Acta Scientiae Circumstantiae
ISSN:
0253-2468
Volume
40
Issue
10
Page Numbers
3674-3679
Language
Chinese
DOI
10.13671/j.hjkxxb.2020.0392
Abstract
As manganese pollution gradually aggravated in surface water, a process in which potassium permanganate assisted/combined contact oxidation filter was developed. In addition, the effect of hardness on manganese removal was investigated by artificial controlling concentrations of calcium and magnesium in the water due to the phenomenon of hardness background varied highly in different regions. The results showed that potassium permanganate oxidized Mn2+ in the water to generate active manganese-based film which can still realize the stable manganese concentration of effluent once the addition of potassium permanganate stopped. The hardness had a significant effect on manganese removal of the contact oxidation filter. When adjusting the concentration of hardness to 40, 200, 400 mg•L-1 and 700 mg•L-1 (as CaCO3) in the influent, the maturity period of contact oxidation filter occurred after 48, 56, 64 days and 72 days, respectively. In the maturity period, the highest removal capability of Mn2+ was 1.8, 1.7, 1.2 mg•L-1 and 0.7 mg•L-1. © 2020, Science Press. All right reserved.
Keywords
Contact oxidation; Hardness; Manganese removal from surface water; Potassium permanganate
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