Novel manganese treatment process by oxidative superfine activated carbon

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K18736
• Research Category: Grant-in-Aid for Challenging Research (Exploratory)
• Allocation Type: Multi-year Fund
• Review Section: Medium-sized Section 22:Civil engineering and related fields
• Research Institution: Hokkaido University
• Principal Investigator: Matsui Yoshihiko 北海道大学, 工学研究院, 名誉教授 (00173790)
• Co-Investigator(Kenkyū-buntansha): 松下 拓 北海道大学, 工学研究院, 教授 (30283401)
• Project Period (FY): 2021-07-09 – 2024-03-31
• Keywords: 環境技術 / 環境材料 / 土木環境工学 / 反応・分離工学 / 水資源

Outline of Final Research Achievements

In this study, as a new Mn2+ removal method, a catalytic oxidation method in which pulverized activated carbon (pulverized charcoal) with a particle size of about 1 μm and free chlorine are added prior to the membrane filtration process was investigated. The chlorine catalytic oxidation of manganese by activated carbon and its removal rate mechanism were elucidated, the removal rate equation was formulated, and the factors affecting the removal rate were clarified. Furthermore, the necessity of coexistence of an oxidant such as chlorine, and the problems and their solutions when activated carbon is used together as an adsorbent were presented.

Free Research Field

水環境工学

Academic Significance and Societal Importance of the Research Achievements

マンガン(Mn)由来の水道水の着色は利用者からの苦情の主要な原因の一つであり、Mnは重要な処理対象物質の１つである。しかしながら、近年普及が進む浄水処理法である膜ろ過では水道原水中の溶解性の2価マンガンイオン(Mn2+)を除去することはできないなか，本研究では膜ろ過浄水法に適したMn除去法を提案できた．さらに、これまで微粉炭や活性炭によるMn2+の触媒酸化は知られておらず、浄水処理におけるMn2+除去法としての適用性も検討されておらず，それらの点においても意義がある。