Pretreatment of low-grade shredded dust e-waste to enhance silver recovery through biocyanidation by Pseudomonas balearica SAE1.

ABSTRACT: Shredded dust originated during mechanical dismantling of waste electrical and electronic equipments (WEEEs) is enriched source of some valuable metals which might be lost as unworthy waste. Composition analysis of shredded dust printed circuit boards (PCBs) revealed the presence of 12.75 mg g^-1  copper (Cu) and 10.34 mg g^-1 silver (Ag) along with some other metals (Fe, Ni, and Au). Low concentration of precious metal, such as gold (Au i.e., 0.04 mg g^-1) classified this shredded dust as low-grade scrap. Despite low concentration of Au this e-waste can be considered as potential "secondary ore" to recover other valuable metals like Ag. To improve the efficiency of Ag bioleaching using Pseudomonas balearica SAE1, pretreatment of e-waste was done using

SUBMITTER: Thakur P 

PROVIDER: S-EPMC8487410 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature