Gold Ore Column Studies with a New Mercury Precipitant
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- 作者：Matthew M. Matlock ; Brock S. Howerton ; John D. Robertson ; and David A. Atwood
- 刊名：Industrial & Engineering Chemistry Research
- 出版年：2002
- 出版时间：October 16, 2002
- 年：2002
- 卷：41
- 期：21
- 页码：5278 - 5282
- 全文大小：103K
- 年卷期：v.41,no.21(October 16, 2002)
- ISSN：1520-5045
文摘
The 1,3-benzenediamidoethanethiol ligand (BDET) completely precipitates soft heavy metalsfrom aqueous solutions under a wide range of conditions. In the present study, the sodium saltof this ligand was applied during the cyanide leaching of ore samples collected from an activegold-mining site in South America. The ligand irreversibly binds mercury from solutionscontaining cyanide, similarly to those present in the gold-cyanide process (GCP). The presentwork tests the industrial viability of BDET in the GCP through a column leaching study onores from South America. The average mercury concentration in the ore samples was 5.22 ppm(milligrams of Hg per kilogram of ore), leached by 19.1% after cyanide extraction. After additionof BDET to the extractant solution, leached mercury from the columns decreased to 0.001 ppm,whereas the leached gold and silver concentrations remained unaffected.