用硫氰酸铵从载金353E树脂上解吸金的初步研究

STUDY ON DESORPTION OF GOLD FROM LOADED RESIN 353E BY AMMONIUM THIOCYANATE

本文研究了溶液的ＰＨ值、解吸平衡时间、温度和解吸剂浓度等因素对用硫氰酸铵由载金３５３Ｅ树脂上解吸金的影响。结果表明：用２—３ｍｏｌ／Ｌ的碱性硫氰酸铵由载金３５３Ｅ树脂上解吸金效果较好。解吸金后的含ＳＣＮ－离子的树脂可以用０．２ｍｏｌ／Ｌ硝酸铁再生，也可以用廉价的氯化钠再生，其再生效果均较好。

he effects of PH value in the solution, desorption time, temperature and concentration of the desorbent on the desorption of gold from the loaded ion-exchange resin 353E by ammonium thiocyanate were studied. The results showed that the gold was desorbed effectively by 2-3 mol/L ammonium thiocyanate. The barren resin was regenerated by 0. 2 mol/L Fe(NO3)3 solution or 2 mol/L NaCl solution with the same good effects.