The adsorption behavior and mechanism of thiourea resin ( TUR) for Au (Ⅲ ) were investigated. Experimental results show that TUR resin has a good adsorptivity for Au( Ⅲ) in Hac - NaAc medium at pH value of 2.60. The statically saturated Au( Ⅲ) sorption capacity is 1106.9 mg ? G-1 resin. The Au(Ⅲ) adsorbed on TUR resin could be eluted by 15% NH2CSNH2 - lmol ? L-1 HC1 (1: 1) and the e-lution rate is 92. 6%. The adsorption of Au( Ⅲ) on TUR follows the Freundlich isotherm. The AH of the adsorption is 27. 8 kj ? Mol"1. The sorption rate constant is5.23×l0-5s-1. The activation energy is 16. 23 kJ ? Mol" . The molar coordination ratio of the functional group of TUR to Au( Ⅲ) is about 1:1. The adsorption mechanism of resin for Au( Ⅲ) is suggested according to chemical analysis and IR spec-traoscopy results.%研究了Au(Ⅲ)在巯基树脂上的吸附行为.结果表明:在298 K时静态饱和吸附容量为1106.9 mg/g树脂,用15%硫脲与1 mol·L-1盐酸的1:1混合溶液作解吸剂解吸率可达92.60%.等温吸附遵循Freundlich经验式；测得在298 K时,吸附速率常数k298=5.23×10-5s-1；吸附活化能Ea=16.23 kJ·mol-1；吸附反应热效应AH= 27.8 kJ·mol-1.用饱和容量法测定巯基树脂吸附Au(Ⅲ)的配位比均接近1:1.红外光谱测定表明:树脂功能基- SH中硫原子与Au(Ⅲ)形成了配位键.
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