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A COMPREHENSIVE REVIEW ON PARAMETERS INFLUENCING BIOLEACHING OF METALS FROM E-WASTE
Pradeep Kumar.S,Govindaradjane.S

Published in: International Journal of Current Engineering And Scientific Research ( IJCESR)
Volume- 4, Issue-8, pp.63-75, Aug 2017
DPI :-> 16.10046.IJCESR.2017.V4I8.6375.1892



Abstract
‘Electronic waste’ (E-waste) is considered as a mixture of various metals. In particular, it consists of copper, aluminium, nickel, iron and steel, with various types of plastics and ceramics. Recycling of E-waste has gained importance in recent years, not only from the point of waste treatment, but also from the valuable metals that can be recovered, thus having substantial economic value generation from waste products. In the last decade, biotechnology has emerged as the most promising technology for recovering metals from primary and secondary sources and wastes. The use of microorganisms appears to be economically the most appropriate method for recycling the valuable metals from secondary resources. Bioleaching process offers a number of advantages compared to the conventional methods. In spite of the above advantage bioleaching is at its nascent state even in well developed countries and in India, it is yet to take off. Based on exhaustive literature survey carried out, it is found that generally there are eight parameters which influence the bioleaching process. The eight influencing parameters which have been selected in the present study, namely: pH, temperature, oxidation reduction potential (ORP), pulp density (PD), metal dosage concentration (MDC), particle size (PS), Solid / liquid ratio (S/L ratio), oxygen content (OC) or dissolved oxygen (DO) and their influence on bioleaching of metals from E-waste has been comprehensively reviewed based on published work for the past 15 years. The influence of the above said parameters on the performance of several bacteria i.e. 13 families investigated so far, on the bacterial growth and leaching efficiency of heavy metals from PCBs, have been highlighted

Key-Words / Index Term
Bioleaching, biohydro metallurgy, E-waste, influencing parameters.

How to cite this article
Pradeep Kumar.S,Govindaradjane.S , “A COMPREHENSIVE REVIEW ON PARAMETERS INFLUENCING BIOLEACHING OF METALS FROM E-WASTE”, International Journal of Current Engineering And Scientific Research ( IJCESR), 4, Issue-8, pp.63-75, Aug 2017. DPI:16.10046.IJCESR.V4.I8.1892