Recovery and Reuse of Manganese Dioxide Catalyst Using Ferrosoferric Oxide as Magnetic Substance for Hydrogen Peroxide Treatment.

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  • TOUDA Akihiro
    Department of Energy Systems, Graduate School of Natural Science and Technology, Kanazawa University
  • KAWANISHI Takuya
    Department of Energy Systems, Graduate School of Natural Science and Technology, Kanazawa University
  • HAYASHI Yoshishige
    Department of Chemistry and Chemical Engineering, Faculty of Engineering, Kanazawa University
  • SHIMIZU Nobuaki
    Department of Chemistry and Chemical Engineering, Faculty of Engineering, Kanazawa University

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Other Title
  • 過酸化水素水処理のための四三酸化鉄磁性体による二酸化マンガン触媒の回収と再利用
  • 過酸化水素水処理のための四三酸化鉄磁性体による2酸化マンガン触媒の回収と再利用
  • カサンカ スイソスイ ショリ ノ タメ ノ シサンサンカ テツ ジセイタイ ニ

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Abstract

In batch system for the catalytic decomposition of contaminants in wast water, the recovery of the catalytic particles is of great concern. One of the possible recovery means is to utilize magnetic separation. In the present work, in order to recover non-magnetic MnO2 catalytic particles, fine Fe3O4 particles were added into the solution and the coagulates were collected magnetically. The recovery efficiency was as high as 99%. Furthermore, the influence of Fe3O4 particles on the catalytic decomposition of H2O2 by MnO2 was investigated because H2O2 causes various problems in maintainning stable operation of wast water treatment system. The experimental results showed that the addition of Fe3O4 enhances the decomposition rate of H2O2 because MnO2 particles were well dispersed by Fe3O4. These results suggests that the introduction of fine Fe3O4 particles is effective for the decomposition of H2O2 as well as the recover of MnO2 catalytic particles.

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