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Chinese student extracts gold from scrap CPUs
Thursday January 05, 2012 08:24:17 AM,
IANS
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Beijing: A Chinese
student has extracted pure gold from scrap CPUs, earning him the
title "modern alchemist".
Li Dianwu, a chemistry senior at Nankai University in Tianjin in
north China, dissolved useless CPUs in a solution of sulfuric
acid, thiourea and hydrogen peroxide, and filtered the solution
with activated carbon.
Then he put the metal-filled activated carbon in a muffle furnace
and extracted 65 milligrams of gold at a temperature of 1,100
degrees Celsius, the Shanghai Morning Post reported Wednesday.
The three pinhead-sized beads are 99.99 percent pure gold, Li told
the newspaper after he posted 20 photos of his gold extracting
process on the popular social networking website, renren.com.
His post immediately drew more than 60,000 viewers.
Though Li's process is not poisonous, a chemical expert surnamed
Ye told people not to follow his example because the method
requires professional knowledge and equipment.
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