Our partner from UWITS has published a paper exploring how biogenic cyanide (bio-CN), which naturally occurs in microorganisms and is biodegradable, could be considered a viable and green alternative to chemical cyanidation given its use in precious metals (PMs) recovery from metal-bearing resources.
This paper discusses the research on cyanogenic microorganisms known to produce bio-CN, the mechanism and metabolic pathways involved in bio-CN production, and the genetics of cyanide production. The paper take a deep dive into the factors influencing bio-CN production and the methods used for its quantification as well as the application of bio-CN in leaching PMs i.e., gold (Au), palladium (Pd), platinum (Pt), and rhodium (Rh) from primary and secondary resources, pre-treatment approaches used, and the mechanism of residual bio-CN detoxification are systematically and comprehensively reviewed and provided. Further, the review provides essential insights into key challenges faced during bio-CN production and its application in PMs leaching and offers insight into innovative ways of thinking to progress towards commercialisation.
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