1991/06/01 by William R. Knocke, John E. Van Benschoten, Maureen J. Kearney +2
Earth and Planetary Sciences · Engineering · #Extraction and Separation Processes #Geochemistry and Elemental Analysis #Metal Extraction and Bioleaching
paper · doi:10.1002/j.1551-8833.1991.tb07167.x
crossref issued 1991/06/01 · crossref published 1991/06/01 · crossref published-online 1991/06/01 · crossref published-print 1991/06/01 · openalex publication_date 1991/06/01 · crossref created 2018/02/22 · crossref deposited 2023/09/25 · openalex created_date 2025/10/10 · crossref indexed 2026/07/30 · openalex updated_date 2026/07/30
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 MnO X (s). The sequence in which oxidants are added may be an important issue for design and operation.