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Kinetics of manganese and iron oxidation by potassium permanganate and chlorine dioxide

TitleKinetics of manganese and iron oxidation by potassium permanganate and chlorine dioxide
Publication TypeJournal Article
Year of Publication1991
AuthorsKnocke WR, Van Benschoten JE, Kearney MJ, Soborski AW, Reckhow DA
JournalJournal - American Water Works Association
Volume83
Issue6
Start Page80
Pagination80-87
Date Published06/1991
Other NumbersProduct Number: JAW_0030316
KeywordsConcentration effect, iron, Kinetics, Manganese, Medium effect, Oxidation, PH, Potassium Permanganates, Temperature, Water treatment
Abstract

This article describes research to quantify the kinetics of Mn(II) and Fe(II) oxidation by potassium permanganate and chlorine dioxide; illustrates the effects of reduced metal ion concentration, pH, temperature, and the presence of dissolved organic carbon (DOC) on these kinetics; and investigates aspects of oxidation through modeling analyses. Among conclusions based on experimental results were the following: oxidation of reduced Mn(II) was rapid except at low solution temperatures; rates of Mn(II) oxidation are acceptable in the presence of humic or fulvic acids, but those acids strongly inhibit Fe(II) oxidation efficiency; poor manganese removal may be caused by inefficient capture of colloidal MnOx(s). The sequence in which oxidants are added may be an important issue for design and operation.