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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 19    No. 6    December 2009

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Adsorption properties of Ag(I), Au(III), Pd(II) and Pt(IV) ions on
commercial 717 anion-exchange resin
LIU Peng(刘 鹏)1, LIU Guang-feng(刘广峰)1, CHEN Da-lin(陈大林)2,
CHENG Shao-yi(程绍逸)2, TANG Ning(唐 宁)1

1. Key Laboratory of Nonferrous Metal Chemistry and Resources Utilization of Gansu Province,
College of Chemistry and Chemical Engineering, Lanzhou University, Lanzhou 730000, China;
2. Jinchuan Group Limited, Jinchang 737104, China

Abstract:The adsorption properties of the four precious metal ions (Ag(Ⅰ), Au(Ⅲ), Pd(Ⅱ) and Pt(Ⅳ)) on the commercial Cl-form 717 strongly basic anion-exchange resin were studied in detail. The effects of the contact time, solution acidity, and concentrations of Cl and Pb2+ ions on the adsorption properties were studied by the batch method. Then, the column method was conducted under the optimized adsorption conditions (pH=3.0). The effects of the sample loading flow rate and the length-to-diameter ratios of the columns were investigated. The precious metal ions adsorbed could not be eluted completely after the saturated adsorption because the precious metal ions were found to be reduced to their metallic states during the adsorption process. So, it is recommended that the commercial Cl-form 717 strongly basic anion-exchange resin should be decomposed directly to recovery the precious metals after the saturated adsorption.

 

Key words: adsorption; commercial resin; precious metal ions; optimization; reduction

ISSN 1672-7029
CN 43-1423/U

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