期刊
SEPARATION AND PURIFICATION TECHNOLOGY
卷 230, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.seppur.2019.115834
关键词
Thiosulfate; Gold; Activated carbon; Adsorption; Ligand exchange
资金
- Natural Science Foundation of China [51674128, 21764008]
A clean and effective activated carbon modification method aimed at the cleaner production of gold using activated carbon was investigated in this paper. Activated carbon rich in nitrogen and sulfur (H-AC) was synthesized by a clean and simple method. The gold adsorption performance of H-AC was investigated by adsorption experiment, in which a gold adsorption capacity of 25.8 kg/t was achieved on H-AC. The materials were characterized by FT-IR, SEM, EDS and XPS, the results identified that the activated carbon's modification and the gold adsorption on H-AC were successful. Furthermore, the adsorption of Au(S2O3)(2)(3-) on H-AC may be a ligand interchange mechanism. Last, it was found that about 87.6% of gold could be stripped from H-AC-Au containing gold 2.0 kg/t via elution. This study reported a new effective activated carbon related gold recovery method in non-cyanide clean thiosulfate system, which is of great significance to the cleaner production of gold.
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