2017•IOP Conference Series Materials Science and EngineeringOpen access

Impact of solvent extraction organics on adsorption and bioleaching of A. ferrooxidans and L. ferriphilum

Hualong Yu, Liu Xiaorong

Abstract

Copper solvent extraction entrained and dissoluted organics (SX organics) in the raffinate during SX operation can contaminated chalcopyrite ores and influence bioleaching efficiency by raffinate recycling. The adsorption and bioleaching of A. ferrooxidans and L. ferriphilum with contaminated ores were investigated. The results showed that, A. ferrooxidans and L. ferriphilum cells could adsorb quickly on minerals, the adsorption rate on contaminated ores were 83% and 60%, respectively, larger than on uncontaminated ores. However, in the bioleaching by the two kinds of acid bacterias, contaminated ores presented a lower bioleaching efficiency.

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Key concepts: Bioleaching, Raffinate, Adsorption, Chemistry, Extraction (chemistry), Metallurgy, Chalcopyrite, Contamination