Modeling Manganese Oxidation with KMnO4 for Drinking Water Treatment
Publication: Journal of Environmental Engineering
Volume 125, Issue 10
Abstract
Manganese (Mn) in a drinking water distribution system can cause multiple aesthetic problems including discolored water and fouling or scaling of fixtures. Oxidation and solid-liquid separation processes are typically employed at a treatment plant to limit the concentration of Mn entering the distribution system. Potassium permanganate (KMnO4) is commonly used to oxidize the manganous ion (Mn+2) to manganese oxide (MnO2). In this study, a mechanistic model is applied to the oxidation of manganese at a treatment plant. Literature kinetic constants (determined with artificial water) are compared with the values obtained for the plant's natural water. The solution and surface phase oxidation rate constants determined with the natural water are two to six orders of magnitude less than those determined with the artificial water. The reduced oxidation rate in the natural water is attributed to the presence of dissolved organic matter, which can exert a competitive demand on the oxidant and interfere with the oxidation by complexing Mn+2. The development of an additional rate constant for the oxidation of dissolved organic matter improves the modeling results for KMnO4 concentration versus time, but only marginally explains the Mn+2 oxidation rate differences.
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References
1.
Carlson, K. H., Knocke, W. R., and Gertig, K. R. (1997). “The role of speciation in developing effective iron and manganese removal strategies.” J. AWWA, 89(4), 62–71.
2.
Davies, S. H. R. ( 1986). “Geochemical processes at mineral surfaces.” ACS symposium series, No. 323, J. A. Davis and K. F. Hayes, eds., American Chemical Society, Washington, D.C., 487–502.
3.
Davies, S. H. R., and Morgan, J. J. (1989). “Manganese (II) oxidation kinetics on metal oxide surfaces.” J. Colloid and Interface Sci., 129(1), 63–77.
4.
Ficek, K. J. (1985). “Manganese removal using potassium permanganate in low pH, low hardness waters.” Proc., 1985 AWWA Annu. Conf., American Water Works Association, Denver, Colo.
5.
Gregory, D., and Carlson, K. H. (1996). “The effectiveness of ozone, chlorine dioxide and potassium permanganate for oxidizing dissolved manganese.” Proc., 1996 AWWA Annu. Conf., American Water Works Association, Denver, Colo.
6.
Knocke, W. R., and Van Benschoten, J. E. (1990). “Alternative oxidants for the removal of soluble iron and manganese.” Am. Water Works Assn. Res. Found. Final Rep., Denver, Colo.
7.
Morgan, J. J. (1967). “Chemical equilibria and kinetic properties of manganese in natural waters.” Principles and applications of water chemistry, S. D. Faust and J. V. Hunter, eds., Wiley, New York.
8.
Nealson, K. H., and Myers, C. R. (1992). “Microbial reduction of manganese and iron: New approaches to carbon cycling.” Appl. Envir. Microbiology, 58(2), 439–443.
9.
Posselt, H. S., Reidies, A. H., and Weber, W. J., Jr. (1968). “Coagulation of colloidal hydrous manganese dioxide.” J. AWWA, 60(1), 48–62.
10.
Sly, L. I., Hodgkinson, M. C., and Arunpairojana, V. (1990). “Deposition of manganese in a drinking water distribution system.” Appl. Envir. Microbiology, 56(3), 628–639.
11.
Van Benschoten, J. E., Lin, W., and Knocke, W. R. (1991). “Kinetic modeling of manganese (II) oxidation by chlorine dioxide and potassium permanganate.” Envir. Sci. and Technol., 26(7), 1327–1333.
Information & Authors
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Published In
Journal of Environmental Engineering
Volume 125 • Issue 10 • October 1999
Pages: 892 - 896
History
Received: Dec 15, 1998
Published online: Oct 1, 1999
Published in print: Oct 1999
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