Removal of contaminating metals from soil by sulfur-based bioleaching and biogenic sulfide-based precipitation

Di FANG, Xue LIU, Ruichang ZHANG, Wenjing DENG, Lixiang ZHOU

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5 Citations (Scopus)

Abstract

The potential of a hybrid process incorporating sulfur-based bioleaching and sulfide-based precipitation for treatment of metal-contaminated soil was examined in batch-type experiments. The sulfur-based soil bioleaching process with Acidithiobacillus sp. could be initiated at a wide range of initial pH from 4.0 to 6.3. After 15 days, 98% of Zn, 89% of Cu and 79% of Cd was bioleached. The gaseous sulfides recycling from Desulfovibrio sp.-mediated sulfate-reducing reactor via N₂ sparging efficiently treated metal-loaded soil leachate. With a sulfide/metal ratio of 3.0, 88% of Zn, 100% of Cu and 95% of Cd were precipitated, resulting in effluent metal concentrations of 3.5 mg Zn²⁺/L, 0.2 mg Cu²⁺/L and 0.03 mg Cd²⁺/L. Copyright © 2013 Taylor & Francis Group, an informa business.
Original languageEnglish
Pages (from-to)473-478
JournalGeomicrobiology Journal
Volume30
Issue number6
Early online dateJul 2012
DOIs
Publication statusPublished - Jul 2013

Fingerprint

Bioleaching
Sulfides
Sulfur
Soil
Metals
sulfur
sulfide
Soils
metal
Acidithiobacillus
soil
Desulfovibrio
Recycling
Sulfates
leachate
Effluents
recycling
effluent
sulfate
removal

Citation

Fang, D., Liu, X., Zhang, R., Deng, W., & Zhou, L. (2013). Removal of contaminating metals from soil by sulfur-based bioleaching and biogenic sulfide-based precipitation. Geomicrobiology Journal, 30(6), 473-478.

Keywords

  • Metal contaminant
  • Soil
  • Soil leachate
  • Sulfide precipitation
  • Sulfur bioleaching