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Effect of bacterial treatment on silver recovery from Artvin-Kafkasor ore

Ozdemir, Z
Ozbayoglu, G
Atalay, U
Özcengiz, Gülay
Alaeddinoglu, G
The enhancement of the extraction of silver from Artvin-Kafkasor ore have been studied by the application of bio-oxidation with Thiobacillus ferrooxidans. The effects of various parameters such as bacterial treatment duration, inoculum size and growth kinetics were investigated. The bacterial treatment of -208 mum size ore with Thiobacillus ferrooxidans before cyanidation resulted in silver recoveries of above 60% while direct cyanidation could only yield 40.36% silver recovery.