Selenium recovery from kiln powder of cement manufacturing by chemical leaching and bioreduction

S. Soda, A. Hasegawa, M. Kuroda, A. Hanada, Mitsuo Yamashita, M. Ike

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

A novel process by using chemical leaching followed by bacterial reductive precipitation was proposed for selenium recovery from kiln powder as a byproduct of cement manufacturing. The kiln powder at a slurry concentration of 10 w/v% with 0.25 M Na2CO3 at 28 °C produced wastewater containing about 30 mg-Se/L selenium. The wastewater was diluted four-fold and adjusted to pH 8.0 as preconditioning for bioreduction. A bacterial strain Pseudomonas stutzeri NT-I, capable of reducing selenate and selenite into insoluble elemental selenium, could recover about 90% selenium from the preconditioned wastewater containing selenium of 5 mg-Se/L when supplemented with lactate or glycerol. The selenium concentrations in the treated wastewater were low around the regulated effluent concentration of 0.1 mg-Se/L in Japan.

Original languageEnglish
Pages (from-to)1294-1300
Number of pages7
JournalWater Science and Technology
Volume72
Issue number8
DOIs
Publication statusPublished - 2015 Oct 1

Fingerprint

Kilns
Selenium
selenium
Leaching
Cements
cement
manufacturing
leaching
Powders
Recovery
Wastewater
wastewater
selenate
selenite
Glycerol
slurry
Byproducts
chemical
Effluents
effluent

Keywords

  • Biological reduction
  • Cement manufacturing
  • Chemical leaching
  • Kiln powder
  • Selenium

ASJC Scopus subject areas

  • Environmental Engineering
  • Water Science and Technology

Cite this

Selenium recovery from kiln powder of cement manufacturing by chemical leaching and bioreduction. / Soda, S.; Hasegawa, A.; Kuroda, M.; Hanada, A.; Yamashita, Mitsuo; Ike, M.

In: Water Science and Technology, Vol. 72, No. 8, 01.10.2015, p. 1294-1300.

Research output: Contribution to journalArticle

Soda, S. ; Hasegawa, A. ; Kuroda, M. ; Hanada, A. ; Yamashita, Mitsuo ; Ike, M. / Selenium recovery from kiln powder of cement manufacturing by chemical leaching and bioreduction. In: Water Science and Technology. 2015 ; Vol. 72, No. 8. pp. 1294-1300.
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