临床毒理学杂志
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Selection of Feasible Leaching Method for Recovery of Heavy Metals from E-Waste Using Analytic Hierarchy Approach

Garima Minocha, Vinita Khandegar*, Sanigdha Acharya

Amount of e-waste is increasing tremendously over the years, from almost getting doubled each year. 40% e-waste consists of many metals and precious metals. The rapid growth in technology development is alarming, as a result more and more e-waste is generating. This leads to myriad problems for handling or management of e-waste. Traditional methods of disposal of e-waste such as landfilling, composting and incineration are major threat to the environment and life. In this study recovery of metals through hydro-metallurgical process such as thiosulfate (M1), iodide (M2) aqua-regia (M3) and thiourea (M4) leaching methods were compared in terms of economic feasibility, environmental impact and reagent reuse in order to find out a feasible leaching method using Analytic Hierarchy Process (AHP). The selection of feasible leaching method has been performed by applying the Saaty, ranking. From the final ranking, thiosulfate (M1) scored=0.09, iodide (M2)=0.16, aqua-regia (M3)=0.39 and thiourea (M4)=0.39. From the result M3 and M4 are the feasible method for recovery of heavy metals from e-waste.