Recovery of Gold from Pregnant Thiourea Leaching Solution by Synergistic Extraction

Aim of this research is to investigate the ability of synergist system of D2EHPA-isodecanol to recover gold from thiourea leaching solution. Synergistic extraction was introduced to replace single extraction due to enhance the extraction efficiency of heavy metal such as gold, silver copper and etc. In order to improve extraction efficiency, di-(2ethylhexyl) phosphoric acid (D2EHPA) was mixed with isodecanol to provide synergistic effect together with leaching solution which thiourea. From the synergist extraction system. The optimum pH is at 2.5 which in acidic range producing the highest yield of %E of 94.6%. It was found that synergistic D2EHPA-isodecanol extraction is successful as it yield %E of 99.4% if the ratio aqueous: organic is set to 1:2.