Activated Hard Shell of Apricot Stones： A Promising Adsorbent in Gold Recovery

活性炭被证明了是为从水溶液的许多金属离子的恢复的有效吸附物。在这研究，伊朗的李属石头的激活的难壳从 electro-plating 废水被用于金恢复。象吸附物的剂量和粒子大小那样的参数的效果，最适 PH，在金恢复上混合的焦虑速度被调查。结果证明在最佳操作条件下面，超过 98% 金离子在就 3 h 以后被吸附到活性炭上。另外，吸附的金牌能是从由剥去方法改进的这吸附物的 eluted。这个过程在缓冲冼脱与包含有机溶剂的水溶液跟随的环境温度与强碱包含黄金沉重的吸附物的接触。它被发现李属石头的那激活的难壳代替的潜力在黄金进口了商业活性炭吸附过程。

Activated carbon has been proven to be an effective adsorbent for the recovery of a wide variety of metal ions from aqueous solutions. In this research, the activated hard shell of Iranian apricot stones was used for gold recovery from electro-plating wastewater. The effect of parameters such as dose and particle size of adsorbent,pH, agitation speed of mixing on the gold recovery was investigated. The results showed that under the optimum operating conditions more than 98% of gold ions were adsorbed onto activated carbon after just 3 h. In addition, the adsorbed gold could be eluted from this adsorbent by improved striping method. The process involves contact of gold-laden adsorbent with a strong base at ambient temperatures followed by elution with an aqueous solution containing an organic solvent. It was found that activated hard shell of apricot stones has the potential to replace im ported commercial activated carbons in gold adsorption processes.