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http://dx.doi.org/10.5467/JKESS.2014.35.4.259

The Leaching and Recovery of Au from Scrap of PCBs  

You, Don-Sang (Department of Energy and Resource Engineering, Chosun University)
Park, Cheon-Young (Department of Energy and Resource Engineering, Chosun University)
Publication Information
Journal of the Korean earth science society / v.35, no.4, 2014 , pp. 259-266 More about this Journal
Abstract
This study was carried out to find an environmental friendly and effective way to leach Au and Ag from scrap of Printed Circuit Boards (PCBs) using sodium-hypochlorite solution. In an EDS analysis, valuable metals such as Cu, Sn, Sb, Al, Ni, Pb and Au were all found in PCBs. The highest leaching rates obtained were 1% of pulp density with a chlorine:hypochlorite of 2:1 and a concentration of NaCl at 2M. The highest Au recovery was observed with the addition of sodium metabisulfite to make a 3M solution. It is confirmed that the leaching agent (chlorine-hypochlorite) could effectively leach Au and Ag from Printed Circuit Boards (scrap parts) and the additive reagent sodium metabisulfite could easily precipitate Au from the chlorine-hypochlorite solution.
Keywords
chlorine-hypochlorite; Au; leaching and recovery; scrap; sodium metabisulfite;
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Times Cited By KSCI : 1  (Citation Analysis)
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