Control of Geochemical Mobility of Arsenic by Liming in Materials Subbjected to Acid Mine Drainage

• Published in: Journal of soils and sediments Vol. 8; no. 2; p. 123
• Main Authors: de Andrade, Renato P, Figueiredo, Bernardino R, de Mello, Jaime WV, Santos, Julio CZ, Zandonadi, Lorenza U
• Format: Journal Article
• Language: English
• Published: 01-01-2008
• ISSN: 1439-0108

The effectiveness of the use of lime (CaCO sub(3)) to control the arsenic (As) mobilization in partially oxidized sulfide waste of gold mining, was evaluated. The chemical composition of samples, including major, minor and trace elements was determined by X-ray fluorescence (XRF). Aqueous suspensions were prepared from the sulfide materials. The potential for acidic water generation of the sulfide materials was obtained by the acid-base accounting (ABA) method given by the difference between the potential acidity (PA) and the neutralization potential (NP). The results showed that the sulfur concentrations were also high from gold deposits associated with sulfide and arsenic occurrences. The oxidation of the sulfide material was significantly lower with high buffering capacity.