Characteristics of Heavy Metals Elution from Anaerobically Digested Sewage Sludge with Oxidizing Reagents

DOI
  • ITO Ayumi
    Dept of Frontier Materials and Function Engineering, Graduate School of Engineering, Iwate University
  • GOTO Hiroyuki
    Kurita Water Industries Ltd
  • TAKAHASHI Kenta
    Dept. of Civil and Environmental Engineering, Graduate School of Engineering, Iwate University
  • AIZAWA Jiro
    Dept. of Civil and Environmental Engineering, Iwate University
  • Umita Teruyuki
    Dept. of Civil and Environmental Engineering, Iwate University

Bibliographic Information

Other Title
  • 酸化剤による下水消化汚泥からの重金属の溶出特性に関する研究

Abstract

The characteristics of heavy metals elution from anaerobically digested sewage sludge with oxidizing reagents were investigated by applying hydrogen peroxide, ferric sulfate or their combination to the sludge under acidic conditions. The application of both hydrogen peroxide and ferric sulfate accelerated the elution of Cd, Cu andZn from the sludge and remarkably improved the elution efficiency of Cu at pH2.<BR>Heavy metals in the sludge were fractionated into three organically bound forms associated with water-soluble proteins, fatsoluble ones and extracellular polymers and residual one. The contents of Cu in the organically bound forms associated with fatsoluble proteins and extracellular polymers and the residual form were significantly decreasedafter the metals elution process with ferric sulfate and hydrogen peroxide at pH 2. These results showed a possibility that hydroxyl radicals produced in the Fenton reaction promote the elution of Cu from the sludge.

Journal

Keywords

Details 詳細情報について

  • CRID
    1390282679087772416
  • NII Article ID
    130003949527
  • DOI
    10.11532/proes1992.43.311
  • ISSN
    1884829X
    13415115
  • Text Lang
    ja
  • Data Source
    • JaLC
    • CiNii Articles
  • Abstract License Flag
    Disallowed

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