HUSCAP logo Hokkaido Univ. logo

Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Engineering / Faculty of Engineering >
Peer-reviewed Journal Articles, etc >

Oxidative removal of soluble divalent manganese ion by chlorine in the presence of superfine powdered activated carbon

This item is licensed under:Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International

Files in This Item:
Oxidative removal of soluble Mn_ver5.3ym all.pdf837.86 kBPDFView/Open
Please use this identifier to cite or link to this item:

Title: Oxidative removal of soluble divalent manganese ion by chlorine in the presence of superfine powdered activated carbon
Authors: Saito, Shun Browse this author
Matsui, Yoshihiko Browse this author →KAKEN DB
Yamamoto, Yasuhiko Browse this author
Matsushita, Shuhei Browse this author
Mima, Satoru Browse this author
Shirasaki, Nobutaka Browse this author →KAKEN DB
Matsushita, Taku Browse this author →KAKEN DB
Keywords: SPAC
reaction kinetics
Issue Date: 15-Dec-2020
Publisher: Elsevier
Journal Title: Water research
Volume: 187
Start Page: 116412
Publisher DOI: 10.1016/j.watres.2020.116412
PMID: 32971398
Abstract: Here, we examined the removal of soluble divalent manganese (Mn(II)) by combination treatment with superfine powdered activated carbon (SPAC) and free chlorine in a membrane filtration pilot plant and batch experiments. Removal rates >95 % were obtained with 3 mg/L SPAC, 1 mg/L chlorine, and a contact time of 4 min, meeting practical performance standards. Mn(II) was found to be oxidized and precipitated on the surface of the activated carbon particles by chlorine. The Mn(II) removal rate was fitted to pseudo-first-order reaction kinetics, and the rate coefficient changed in inverse proportion to as-is particle size, but not to true particle size. The rate coefficient was independent of both Mn(II) concentration, except at high Mn(II) concentration, and the chlorine concentrations tested. The rate-determining step of Mn(II) removal was confirmed to be external-film mass transfer, not chemical oxidation. Activated carbon was found to have a catalytic effect on the oxidation of Mn(II), but the effect was minimal for conventionally sized activated carbon. However, Mn(II) removal at feasible rates for practical application can be expected when the activated carbon particle diameter is reduced to several micrometers. Activated carbon with a particle size of around 1–2 μm may be the most appropriate for Mn(II) removal because particles below this size were aggregated, resulting in reduced removal efficiency.
Rights: © 2020. This manuscript version is made available under the CC-BY-NC-ND 4.0 license
Type: article (author version)
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 松井 佳彦

Export metadata:

OAI-PMH ( junii2 , jpcoar_1.0 )

MathJax is now OFF:


 - Hokkaido University