Bacterially generated Fe2(SO4)3 from pyrite, as a leaching agent for heavy metals from lignite ash | Zendy

Jelena Jekic | Zendy; Vladimir Beškoski | Zendy; Gordana GojgićCvijović | Zendy; Mirjana Grbavcic | Zendy; Miroslav Vrvić | Zendy

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Bacterially generated Fe2(SO4)3 from pyrite, as a leaching agent for heavy metals from lignite ash

Author(s) -

Jelena Jekic,

Vladimir Beškoski,

Gordana GojgićCvijović,

Mirjana Grbavcic,

Miroslav Vrvić

Publication year - 2007

Publication title -

journal of the serbian chemical society

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.227

H-Index - 45

eISSN - 1820-7421

pISSN - 0352-5139

DOI - 10.2298/jsc0706615j

Subject(s) - leaching (pedology) , chemistry , fly ash , metal , suspension (topology) , coal , heavy metals , environmental chemistry , combustion , pyrite , coal combustion products , metallurgy , mineralogy , environmental science , materials science , soil water , soil science , organic chemistry , mathematics , homotopy , pure mathematics

Investigations of heavy metals from lignite ash, which is a coal combustion by-product, have for years been very interesting from different aspects of environmental protection. In this study, the possibility of microbiological ash leaching, with a strong oxidation agent, bacterially generated Fe2(SO4)3 was investigated in order to minimize the concentration of toxic ash elements. Leaching experiment by the shake flask testing technique was performed during a period of 20 d at a temperature of 28 °C. The results obtained show 5- to 22-fold (for Cd and Ni approx. 5, Zn approx. 6, Mn approx. 8, Cr approx. 13 and Cu approx. 22) higher metal leaching efficicency in the suspension with bacterially generated Fe2(SO4)3 than in the control suspension.

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