Novel atmospheric scorodite synthesis by oxidation of ferrous sulfate solution. Part I

T. Fujita, R. Taguchi, M. Abumiya, M. Matsumoto, E. Shibata, Takashi Nakamura

Research output: Contribution to journalArticlepeer-review

92 Citations (Scopus)

Abstract

A new atmospheric scorodite synthesis process was investigated. A large size and good crystalline scorodite was precipitated at 95 °C even in a short time of 1 to 7 h when ferrous ions were oxidized by oxygen gas in the presence of As(V) ion with concentrations as high as 50 g/L As in sulfuric acid solution. The key point of the process is the ferrous state of iron in solution and the oxidation of ferrous ions during the scorodite precipitation. This scorodite has a particle size of 15 μm with approximately 10% moisture content (wet base) even under atmospheric conditions. The arsenic content was about 30% by mass. The results of the leach test are very desirable. The process can be applied to a primary smelter which produces copper, zinc, lead and other secondary materials.

Original languageEnglish
Pages (from-to)92-102
Number of pages11
JournalHydrometallurgy
Volume90
Issue number2-4
DOIs
Publication statusPublished - 2008 Feb 1

Keywords

  • Arsenic(V)
  • Crystalline precipitate
  • Ferric arsenate
  • Ferrous oxidation
  • Oxygen
  • Scorodite

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry

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