含硫氮螯合树脂对金、银及某些贱金属氰化物吸附性能的研究

用ＩＣＰ－ＡＥＳ研究了含硫氮螯合树脂对碱性氰化溶液中金、银、铜、铁、锌等金属离子的吸附行为。结果表明，该树脂除定量吸附金、银的氰化物外，也吸附铜、锌、铁的氰化物；吸附在树脂上的银及其它贱金属离子可以用２％ＮａＣＮ定量解吸，用硫脲－硫酸溶液可顺利地将金从树脂上洗脱下来，由此可实现金与银等元素的分离。树脂重复使用性能良好。对该树脂吸附金属氰化物的机理进行了初步探讨。

A Study on Adsorption Properties of Gold and Silver Cyanide by a Chelate Resin Containing Sulfur and Nitrogen

A chelate resin containing sulfur and nitrogen was used as an adsorbent and ICP AES was applied to study its adsorption properties to gold, silver from cyanide solution. The resin could adsorb not only gold and silver's cyanide but also copper, zinc and irons cyanide. 2% NaCN could completely desorb silver and other nonoble metal ions except gold. A conclusion could be drawn that the adsorption force between resin and gold was much stronger than others. The gold could be desorbed by thiourea sulfuric acid solution. So the gold could be concentrated and separated from silver and other nonoble metals. The resin could be repeatedly used at least 8 times. The mechanism of adsorption and desorption of gold and silver(s cyanide by the resin was discussed.