As the world‘s population continues to increase and people aspire towards a better quality of life there is an ever-increasing need to locate additional resources and provide infrastructure for a civilized existence, while at the same time avoiding unacceptable pollution and habitat loss. At the centre of these important issues are metals and their behaviour under the conditions pertaining at the surface of the earth, here defined as the weathering environment. In detail this behaviour is controlled by a complex series of mineral-water, mineral-microbe, aqueous chemistry and sorption reactions (Hochella, 2002). Unravelling the nature of these reactions has...

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