Recovery of gold from dilute solutions by using some biomass wastes

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Gold is one of the most expensive precious metals that are widely used not only as traditional jewelleries but also as useful components in a variety of well known advanced materials. On one hand the availability of precious metals is very limited; on the other hand, substantial proportions of these valuable metals are being discarded in the form of aqueous by-products during metal refining or with obsolete electronic devices. Effective and economical recovery processes for precious metals should be urgently developed for their reuse and recycling. Recently, a sorption process using low cost and widely available biomass materials is considered one of the most promising technologies that can be used for the recovery of gold from dilute solutions. This research program will consist of several short and long-term research projects for the improvement and fundamental understanding of the key mechanism for gold recovery from dilute solutions by biosorption followed by reduction.