Ion Exchange and Adsorption Chemistry of Gold Ⅰ. Amide-Phosphonic Acid Ester Type Resin 483C_1-Au(Ⅲ), Au(Ⅰ)-HCl System
Jia Dong-Fang Qiu Ling Yuan Ji-Bing Yang Jiang-Hui(Modern Physics Department and Chemistry Department, Lanzhou University, Lanzhou) Qian Ting-Bao Wang Zhao-Yu(Department of Chemistry, Nankai University, Tianjin)
The chemistry about Au(Ⅲ) taking up by amide-phosphonic acid ester type exchange resin 483C_1[CONHCH_2CH_2P(O)(OR)_2] from HCl has been studied. Experimental results show that AuCl_4~- is taken up by association mechanism and can be described by Freundlich equation, the equilibrium state. The particle diffusion coefficient of AuCl_4~- was determined to be 5.8×10.(-9)cm~2/s~(-1). The kinetic parameters in the desorption process of AuCl_4~- eluted by HCl-thiourea solution as well as the breakthrough process of AuCl_4~- also have been determined and studied.