Influence of ageing on the catalytic activity of ferric sludge for oxidation of Fe(II)

Tufekci N., Sarikaya H.

WATER SCIENCE AND TECHNOLOGY, vol.38, no.6, pp.129-137, 1998 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 38 Issue: 6
  • Publication Date: 1998
  • Doi Number: 10.1016/s0273-1223(98)00574-5
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.129-137
  • Istanbul Technical University Affiliated: No


The catalytic effect of freshly formed or added ferric iron on the Fe(II) oxidation has been demonstrated by previous studies. High Fe(III) concentrations significantly accelerate the oxygenation rate. High Fe(III) concentrations can be maintained only by sludge recycle which eventually leads to sludge ages as high as 10 days. Therefore, the aim of this study was to determine whether ageing of ferric hydroxide sludge affects its catalytic effect on the oxidation of ferrous iron by aeration.