Manganese removal from metal refinery wastewater using Mn(II)-oxidizing bacteria

Santisak Kitjanukit, Kyohei Takamatsu, Kenji Takeda, Satoshi Asano, Naoko Okibe

研究成果: 書籍/レポート タイプへの寄稿会議への寄与

抄録

There is a growing interest in the use of Mn(II)-oxidizing bacteria to treat Mn-containing metal refinery wastewaters instead of using conventional chemical approaches since the former could reduce the cost of alkaline agents and oxidants to remove Mn(II) as Mn oxides at alkaline pH. The Mn level was found naturally dropped in the industrial metal refinery wastewater treatment system, where the formation of Mn-enriched sludge was apparent. This observation motivated us to investigate the possible involvement of microbially mediated reactions. From the sludge sample, Pseudomonas sp. strain SK3 was successfully isolated and tested for its Mn(II)-oxidation characteristics. Strain SK3 completely removed 100 ppm Mn(II) within 42 hours as birnessite ((Na,Ca,K)0.6(MnIV, MnIII)2O4·1.5H2O) under optimized conditions. Copper ions were found to be an important factor in promoting Mn(II) oxidation. Changes in the Mn(IV)/Mn(III) ratio during bacterial Mn(II)-oxidation indicated the involvement of 2-step one-electron transfer reactions in the formation of biogenic birnessite with Mn(III) as intermediate. Characteristics of strain SK3 were compared with those of a well-known Mn(II)-oxidizing bacterium, Pseudomonas putida strain MnB1. Strain SK3 displayed more robust Mn(II) oxidation capabilities under various severe conditions, showing its ideal characteristics for use in the industrial water treatment process.

本文言語英語
ホスト出版物のタイトル22nd International Biohydrometallurgy Symposium
編集者Sabrina Hedrich, Axel Schippers, Kathrin Rubberdt, Franz Glombitza, Wolfgang Sand, Wolfgang Sand, Mario Vera Veliz, Sabine Willscher
出版社Trans Tech Publications Ltd
ページ673-676
ページ数4
ISBN(印刷版)9783035711806
DOI
出版ステータス出版済み - 2017
イベント22nd International Biohydrometallurgy Symposium, 2017 - Freiberg, ドイツ
継続期間: 9月 24 20179月 27 2017

出版物シリーズ

名前Solid State Phenomena
262 SSP
ISSN(印刷版)1012-0394
ISSN(電子版)1662-9779

その他

その他22nd International Biohydrometallurgy Symposium, 2017
国/地域ドイツ
CityFreiberg
Period9/24/179/27/17

!!!All Science Journal Classification (ASJC) codes

  • 原子分子物理学および光学
  • 材料科学(全般)
  • 凝縮系物理学

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