The investigation of the potential of activated hard shell of apricot stones as gold adsorbents

다국어 초록 (Multilingual Abstract)

Activated carbon is the most widely used adsorbent for the recovery of metal ions from dilute solutions. In this work the potential of activatedcarbon produced from hard shell of Iranian apricot stones for the gold recovery from electro-plating wastewater was investigated. The effect ofparameters such as doseof activated carbon, particle size ofactivated carbon, pH and agitationspeed of mixingon thegoldadsorption was studied.The results showed that under the optimum operating conditions, more than 98% of gold was adsorbed onto activated carbon after only 3 h. Inaddition, the adsorbed gold could be eluted from this carbon by improved stripping method. The process involves contact of gold laden activatedcarbon with a strong base at ambient temperatures followed by elution with an aqueous solution containing an organic solvent. It was found thatactivatedcarbonproducedfromhardshellofapricotstoneshavehighpotentialtobeusedinsteadofimportedcommercialactivatedcarbonsingoldadsorption processes.# 2007 The Korean Society of Industrial and Engineering Chemistry. Published by Elsevier B.V. All rights reserved.

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