Some copper and zinc smelters have been forced to cut their output because they have run out of space to store hazardous sulphuric acid in the face of poor demand for the by-product and more may have ...

New research shows that magnesium and other metals in mine waste can be solubilized and recovered thanks to acid-producing bacteria. Researcher Nathan van Wyk believes that the method has great ...

Phosphoric acid produced by the wet process is a pivotal feedstock in fertiliser manufacture but often contains trace heavy metals such as cadmium, lead, zinc and uranium, derived from phosphate rock.

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