金的离子交换与吸附化学 I.酰胺/膦酸酯型树脂483C_(1)-Au(III),Au(I)-HCl系统

Ion Exchange and Adsorption Chemistry of Gold Ⅰ.Amide-Phosphonic Acid Ester Type Resin 483C_(1)-Au(Ⅲ),Au(Ⅰ)-HCl System

研究了酰胺/膦酸酯型树脂483C_(1)[CONHCH_(2)CH_(2)P(O)(OR)_(2)]从盐酸中吸金的化学问题.结果表明平衡服从Freundlich吸附等温式,AuCl_(4)^(-)以缔合机制吸着;测得了AuCl_(4)^(-)的内扩散系数为5.8×10^(-9 )cm^(2)·s^(-1)以及HCl-硫脲为解吸剂时的有关动力学参数;还研究了AuCl_(4)^(-)的柱穿透曲线.

The chemistry about Au(Ⅲ)taking up by amide-phosphonic acid ester type exchange resin 483C_(1)[CONHCH_(2)CH_(2)P(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.