Sorption of platinum and rhodium on carbon adsorbents from chloride solutions |
| |
Authors: | Olga N Kononova Tatiana A Leyman Victoriya N Gavrilova Sergey G Konontsev Dmitry M Kashirin |
| |
Affiliation: | (1) Department of Chemistry, Siberian Federal University, Svobodny Pr. 79, 660041 Krasnoyarsk, Russia |
| |
Abstract: | Sorption recovery of platinum (II, IV) and rhodium (III) on different carbon adsorbents has been studied using fresh chloride
model solutions with platinum and rhodium concentrations of 0.25–1.0 and 0.049 mmol/L, respectively. The concentration of
hydrochloric acid in these solutions varied from 0.001 to 1.0 mol/L. The maximum recovery of platinum and rhodium was achieved
with the carbon adsorbent based on charcoal (wood). This sorbent possesses the highest sorption ability to noble metals in
medium acidic solutions (0.01–0.1 M HCl). However, the sorption from higher acid solutions (0.5–1.0 M HCl) proceeds on sufficiently
high level as well (>80%). The use of thiocarbamide (10%) solutions in sulfuric acid (0.3 mol/L) as a desorption agent results
in almost complete elution of rhodium (more than 95%), whereas platinum is retained in carbon adsorbent. This brings out some
prospects for separation of these noble metals during their recovery from solutions of spent platinum–rhodium catalysts. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|