摘要
１ＩＮＴＲＯＤＵＣＴＩＯＮＭａｎｙｓｔｕｄｉｅｓｏｎｔｈｅｅｘｔｒａｃｔｉｏｎｏｆｇｏｌｄｆｒｏｍｏｒｅｏｒｓｃｒａｐｗｉｔｈｔｈｉｏｕｒｅａｗｅｒｅｒｅｐｏｒｔｅｄ［１－３］，ｂｕｔａｌｔｈｏｓｅｗｅｒｅｌｉｍｉｔｅｄｏｎｌｙｉｎａｃｉｄｉｃｍｅｄ...
Anodic polarization behavior of AuFe mix electrode has been examined in the thiourea solution containing Na2SO3. It was shown that the polarization characteristics of gold is incarnated in the alkaline thiourea solution and the polarization characteristics of iron is reflected in the acidic thiourea solution. Also iron decreases the apparent activation energy of gold dissolution and accelerates the dissolution of gold in the alkaline thiourea solution containing Na2SO3 because of galvanic electrode couple effect between gold and iron. The factors affecting selective dissolution of gold of AuFe mix anode in the thiourea solution containing Na2SO3 were also investigated by electrolysis, and the optimum condition was obtained. The dissolved mass of gold with the exposed area of 1.0 cm2 reached 350 g/m3 within 30 min, and that of iron was zero, in 0.1 mol/L thiourea solution containing 0.5 mol/L Na2SO3, at potential 0.34 V, pH 12.5 and temperature 323 K.
出处
《中国有色金属学会会刊：英文版》
CSCD
1999年第2期189-194,共6页
Transactions of Nonferrous Metals Society of China
