Recovery of Gold from Aqueous Solution Containing Au(III) by Silicon Organic Polymer

Abstract

Abstract:The silicon organic polymer containing PSOT-3 (dioxothiocarbamide groups) has been synthesized and characterized, and the adsorption of Au(III) on PSOT-3 was investigated. The results showed that PSOT-3 had good adsorption capacity for Au(III), and the adsorption of Au(III) was found to be the most effective in 0.1~0.3 mol/dm 3 hydrochloric acid solution. The adsorption is physical and the process is endothermic, and Freundlich isotherm fits the data better than the Langmuir isotherm. The adsorption can be generally described by electrostatic interaction (Coulomb's force) between the adsorbent and the adsorbate. The high adsorption capacity of this sorbent has significant potential for gold recovery from aqueous solutions.

Irreversible Amide‐Linked Covalent Organic Framework for Selective and Ultrafast Gold Recovery

“…As the core of adsorption, various functional adsorbents have been designed to meet the demands of gold recovery, such as metal organic frameworks (MOFs), organic polymers, and biomass materials . However, a majority of these adsorbents suffer from terrible kinetics with several hours or even days to reach equilibrium . Additionally, the poor selectivity, low loading capacity and lacking stability also go against the efficient recovery of gold.…”