THE SEPARATION OF Au(III) AND Pd(II) IN HYDROCHLORIC ACID SOLUTIONS BY STRONG ANION TYPE II EXCHANGE RESINS: THE EFFECT OF COUNTER ION CONCENTRATION AND TEMPERATURE
THE SEPARATION OF Au(III) AND Pd(II) IN HYDROCHLORIC ACID SOLUTIONS BY STRONG ANION TYPE II EXCHANGE RESINS: THE EFFECT OF COUNTER ION CONCENTRATION AND TEMPERATURE
复制标题
强阴离子 II 型交换树脂分离盐酸溶液中的 Au(III) 和 Pd(II)：反离子浓度和温度的影响
DOI：
10.1080/07366290008934730
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发表时间：
2000
影响因子：
2
通讯作者：
V. Salvadó
中科院分区：
文献类型：
--
作者：
J. Sanchez;M. Hidalgo;V. Salvadó
本文研究了强阴离子交换树脂分离盐酸溶液中的金、钯离子的间歇操作和柱操作。盐酸浓度和吸附过程温度的增加具有降低两种金属的吸附容量和分离因子的效果。一个更快的动力学的两种离子的吸附过程的结果从温度升高，这种效果是较高的金离子作为其扩散率的变化较大的结果。虽然钯离子的吸附容量较低，在平衡条件下，吸附等温线得到的建议，他们更强烈地保留的聚合物。这些树脂对两种金属的高容量允许它们用于金和钯的预富集，但它们在定量分离中的应用受到解吸过程中高达%的干扰离子的共洗脱的限制。离子解吸的最佳方法是先用%氨水洗脱回收钯，再用0·5M硫脲的1M盐酸溶液洗脱回收金。
ABSTRACT The separation of gold and palladium ions in hydrochloric acid solutions by strong anion Type II exchange resins is studied in batch and column operations. Increases in the hydrochloric acid concentration and the temperature of the adsorption process have the effect of decreasing the adsorption capacity and the separation factor of both metals. A faster kinetics of the adsorption process of both ions results from temperature increase and this effect is higher for gold ions as a result of greater changes in its diffusivity. Although the adsorption capacity of palladium ions is lower at equilibrium conditions, the adsorption isotherms obtained suggest that they are more strongly retained by the polymers. The high capacities of these resins for both metals permits their use in the preconcentration of gold and palladium but their application in quantitative separation is restricted by the co-elution of up to% of the interfering ion during the desorption process. The best method for ion desorption is sequential elution with% ammonia for palladium recovery followed by 0·5M thiourea in HCI 1M for the recovery of gold.