Abstract:
Due to the advantages of low cost, simple equipment, and eco-friendliness, biooxidation pretreatment technology has gained great development and wide recognition in the exploitation and utilization of refractory gold ore in recent years. However, some problems involving the complicated properties of crude ores, the low arsenic resistance of microorganisms, and the surface passivation phenomenon restrict the application of biooxidation pretreatment to some degree, so how to accelerate the bioleaching of arsenic-bearing gold ores remains a hot and difficult issue in the field of biohydrometallurgy. This paper summarized the research status of strengthening methods for the biooxidation pretreatment of arsenic bearing gold ores, and elaborated the progress and mechanisms of using oxidants, metal ions, galvanic interaction, surfactants, humid acid and magnetized water. On the basis, the major development directions in the future were prospected, which would provide referential guidance for the further application of biooxidation pretreatment of arsenic-containing gold ores.