Precious metal (PM) and copper content of dynamic-RAM modules placed on the market during 1991–2008 has been analysed by AAS following comminution and acid digestion. Linear regression analysis of compositional data ordered according to sample chronology was used to identify historic temporal trends in module composition resulting from changes in manufacturing practices, and to project future trends for use in more accurate assessment of future recycling potential. DRAM was found to be ‘high grade’ waste with: stable levels of gold and silver over time; 80% reduction in palladium content during 1991–2008; and 0.23 g/module/year increase in copper content with a 75% projected increase from 2008 by 2020.
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- Thread starter Thomacus
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