Chemistry Department, Bindura University of Science Education, P. Bag 1020, Bindura, Zimbabwe.
Sci Rep. 2019 Mar 4;9(1):3373. doi: 10.1038/s41598-019-39964-y.
Agricultural wastes have attracted attention as alternative precursors for the production of granular activated carbon. Using batch sorption studies, we demonstrated that granular activated carbon prepared through chemical activation using zinc chloride followed by physical activation in nitrogen environment at high temperatures can effectively adsorb aurocyanide from solution. Furthermore, gold recovery process using the granular activated carbon was amenable to optimization of adsorption parameters such as carbon dosage, initial aurocyanide concentration and contact time. These results may open new fronts on the application of low-cost granular activated carbon, particularly in the carbon-in-pulp metallurgical process.
农业废弃物作为生产颗粒活性炭的替代前体引起了人们的关注。通过批量吸附研究，我们证明了使用氯化锌进行化学活化，然后在高温下在氮气环境中进行物理活化制备的颗粒活性炭可以有效地从溶液中吸附金氰络合物。此外，使用颗粒活性炭的金回收工艺可以优化吸附参数，如碳剂量、初始金氰络合物浓度和接触时间。这些结果可能为低成本颗粒活性炭的应用开辟新的途径，特别是在炭浸冶金工艺中。
