CYANIDE DISTRIBUTION IN THE STREAM SEDIMENTS AND TAILINGS AT THE BONFIM (W-Aa-Bi-Te) MINE, NORTHEASTERN BRAZIL
نویسندگان
چکیده
At the Bonfim mine, cyanide processing used to extract gold from abandoned tailings represents an important environmental concern. In order to evaluate cyanide concentrations, twenty samples of sediments of the main streams crossing the mine site, and ten samples of the five mainly tailings were analyzed for total cyanide. Cyanide was found in two samples of tailings (0.83 and 1.44mg/Kg of total cyanide). Cyanide found indicates that its natural degradation could not occur after nine years of exposition of the tailings under surface conditions. Cyanide is probably present as insoluble metallic complexes formed by reactions between solution used in the gold recovery and metals from ore minerals. Cyanide detected at Bonfim shows concentrations below of those reported to contaminated tailings of the U.S. gold mines.
منابع مشابه
Impaired Short-Term Functioning of a Benthic Community from a Deep Norwegian Fjord Following Deposition of Mine Tailings and Sediments
Citation: Mevenkamp L, Stratmann T, Guilini K, Moodley L, van Oevelen D, Vanreusel A, Westerlund S and Sweetman AK (2017) Impaired Short-Term Functioning of a Benthic Community from a Deep Norwegian Fjord Following Deposition of Mine Tailings and Sediments. Front. Mar. Sci. 4:169. doi: 10.3389/fmars.2017.00169 Impaired Short-Term Functioning of a Benthic Community from a Deep Norwegian Fjord Fo...
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