|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals, and Materials
||Recovery of Au(CN)2- from Gold Cyanidation Solution with Graphene Oxide and Reduced Graphene Oxide Hydrogels as Adsorbents
||Lang Yang, Kaige Sun, Feifei Jia, Shaoxian Song
|On-Site Speaker (Planned)
The adsorption of gold cyanide complex ion (Au(CN)2-) on graphene oxide-polyethylenimine hydrogel (GO/PEI) and reduced graphene oxide-ascorbic acid hydrogel (rGO/AA) from gold cyanidation solution have been studied to explore their potential for gold recovery. The experimental results from adsorption experiments as well as FT-IR, XPS and SEM-EDX analyses have shown that Au(CN)2- could be successfully adsorbed on GO/PEI and rGO/AA hydrogels, and further suggested that GO/PEI and rGO/AA hydrogels could be good adsorbents for the recovery of Au(CN)2- from gold cyanidation solution in terms of high adsorption capacity and fast adsorption rate. The adsorption of Au(CN)2- on both GO/PEI and rGO/AA hydrogels obeyed the Langmuir isotherm model and fitted well with the pseudo-second-order model. The good recovery of Au(CN)2- was largely attributed to the surface properties of GO/PEI and rGO/AA hydrogels in terms of the large specific surface area and the abundant oxygenous functional groups.
||Planned: None Selected