Cyanide Biodegradation by a Native Bacterial Consortium and Its Potential for Goldmine Tailing Biotreatment

A native cyanide-degrading bacterial consortium was isolated from goldmine tailing sediments. Mine tailings are toxic effluents due to their metal–cyanide complexes. The able degrade an initial sodium cyanide concentration ranging 5 120 mg L−1 in alkaline synthetic wastewater (pH > 9.2), for a maximum of 15 days. free biodegradation efficiency 98% the highest tested and followed first-order kinetic profile, with estimated rate constant 0.12 ± 0.011 d−1. streaked serial dilutions on specific medium (R2A). 16S rRNA gene sequencing mass spectrometry proteomic fingerprinting isolates showed that strains belonged Microbacterium paraoxydans, Brevibacterium casei, Brevundimonas vesicularis, Bacillus cereus Cellulosimicrobium sp. first four genera had previously been identified as bacteria. found conditions, showing resistance heavy metals. As Cellulosimicrobium, our knowledge, this is study implicate it directly or indirectly biodegradation. In research, these were functional bacteria degradation, they might be suitable mine biotechnological tertiary treatment.