|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|
|Other Numbers||Product Number: JAW_0030316|
|Keywords||Concentration effect, iron, Kinetics, Manganese, Medium effect, Oxidation, PH, Potassium Permanganates, Temperature, Water treatment|
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.