杏核的活性壳:一种用于黄金回收的有价值的吸附剂(英文)

来源 :Chinese Journal of Chemical Engineering | 被引量 : 0次 | 上传用户:brxdq
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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 con- taining 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. 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. 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 improving striping method. The process involves contact of gold-laden adsorbent with a strong base at ambient temperatures followed by elution with an aqueous solution con- taining 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.
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