"Urban mining", the recycling of precious metals from electronic gadgets, becomes ever more important, although processes that are both efficient and environmentally benign are still scarce. An ...
Chalmers University researchers develop a sustainable method for gold recycling using biodiesel. The method effectively extracts pure gold from mixed metals and is applicable to other socially ...
https://www.thehindubusinessline.com/markets/gold/old-is-gold-jewellers-efforts-to-promote-recycling-pays-rich-dividend/article71125662.ece Copy Gold recycling in ...
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