Structural treatment in sulphide mine wastes through an inhibitor | 61026
Journal of Developing Drugs

Journal of Developing Drugs
Open Access

ISSN: 2329-6631

+44 7868 792050

Structural treatment in sulphide mine wastes through an inhibitory approach in bioleaching-based technique

19th International Conference on Traditional Medicine and Acupuncture & 10th International Conference on Pharmaceutical Research and Drug Discovery & 25th Global Biotechnology Conference

October 25, 2022 | Webinar

Zeinab Piervandi* and Ahmad Khodadadi Darban

Tarbiat Modarres University, Iran

Scientific Tracks Abstracts: J Dev Drugs

Abstract :

The mobility of toxic elements sourced from sulphide tailings causes an undeniable environmental issue for the ecosystem. Acidophilic bacteria generate sulfuric acid as an essential factor for toxic metals leaching. The passivation treatment of mine wastes by acidophilic bacteria can result in a structural amendment on the oreâ??s surface, generating an insoluble and protective layer against the transfer of trace elements into the aquatic environment. In this work, the structural change in waste soil through bioleaching-based treatment was studied on a laboratory scale. The effect of main parameters on soil bio-treatment was investigated, including pH, Fe3+, elemental sulfur and pulp density. Among them, the ferric ion can provide a strong oxidizing condition for the leaching of sulphide minerals and also jarosite generation as a secondary sulphate mineral. The results of bacteria experiments showed the ore surface passivation occurred by the contact mechanisms of bioleaching of pyrite and chalcopyrite. The kinetic of sulphides leaching in the presence of A. ferrooxidans was higher than that of A. thiooxidans. Also, the changes in the structure of sulphide tailings during the surface passivation detected on the macro, micro and nanoscale demonstrated the success of bacterial treatment. Keywords: Jarosite; Ferric ions; Mine wastes; Structural treatment; Surface passivation.

Biography :

Zeinab Piervandi has completed his PhD at Tarbiat Modarres University. She is working at Department of Mining Engineering, Tarbiat Modarres University, Tehran, Iran

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