Modified activated carbons for recovery of gold from thiosulphate solutions

改性活性炭从硫代硫酸盐溶液中回收金。硫代硫酸盐目前正被各国际矿业公司视为氰化物提取黄金的环境友好型替代品。虽然在公开文献中可获得的很少，但关于从硫代硫酸盐浸出浆液中回收的大多数机密研究都集中在离子交换技术上。活性炭作为一种更实用的吸附剂已被完全忽略，因为一般认为它对硫代硫酸金的亲和力很低。在有希望的初步工作的基础上，该项目的目的是开发物理和化学改性的活性炭，其对空间大的硫代硫酸金络合物具有高亲和力。该项目旨在证明活性炭的石墨边缘应最大化，有机活性部位应最小化以实现最佳吸附的假设。

Modified activated carbons for recovery of gold from thiosulphate solutions. Thiosulphate is currently being considered by various international mining companies as an environmentally friendly alternative to cyanide for gold extraction. Although little is available in the open literature, most confidential research on recovery from thiosulphate leach slurries has focused on ion-exchange technology. Activated carbon as a more practical sorbent has been ignored completely owing to the general perception that it has a very low affinity for gold thiosulphate. On the basis of promising preliminary work, the aim of this project is to develop physically and chemically modified activated carbons with a high affinity for the sterically large gold thiosulphate complex. This project will aim to prove the hypothesis that the graphitic edges of an active carbon should be maximised and the organic active sites minimised for optimal adsorption.