Title | Kinetics of manganese and iron oxidation by potassium permanganate and chlorine dioxide |
Publication Type | Journal Article |
Year of Publication | 1991 |
Authors | Knocke WR, Van Benschoten JE, Kearney MJ, Soborski AW, Reckhow DA |
Journal | Journal - American Water Works Association |
Volume | 83 |
Issue | 6 |
Start Page | 80 |
Pagination | 80-87 |
Date Published | 06/1991 |
Other Numbers | Product Number: JAW_0030316 |
Keywords | Concentration 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. |