New Approach for Highly Selective Separation and Recovery of Osmium and Rhodium by Using a Nanoparticle Microcolumn

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• 作者：Fang Wang ; Yuejiao Wang ; Yanhui Li ; Qiong Wang ; Xinyu Qi ; Lei Zhang
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2014
• 出版时间：October 1, 2014
• 年：2014
• 卷：53
• 期：39
• 页码：15200-15206
• 全文大小：385K
• ISSN：1520-5045

文摘

A new solid-phase extraction (SPE) method for recovery of osmium and rhodium was proposed with static batch and column experiments. Nano-Al₂O₃ exhibited high adsorption ability and selectivity for Os(IV) and Rh(III), and the adsorption depended strongly on pH. Both Os(IV) and Rh(III) could be adsorbed quantitatively on nano-Al₂O₃ within a pH range of 4.0鈥?.0, and only Os(IV) could be retained within pH 2.0鈥?.0 while Rh(III) could not. Selective separation could be achieved by adjusting the aqueous pH. The extraction recoveries for the mentioned noble metals were more than 95%. Good stability of nano-Al₂O₃ was demonstrated from regeneration investigation. Finally, selective recovery of Os(IV) and Rh(III) from simulated industrial leach liquor (SILL) was achieved by performing the extraction-stripping process. The negligible uptake of Cu, Zn, Co, Ni, Cd, Pb, and Fe in SILL solution was due to the high selectivity and extractability of nano-Al₂O₃ for osmium and rhodium.