NDLI: An investigation of Acid Rock Drainage (ARD) occurrence in a gold mine located in a Southeastern Brazil region

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An investigation of Acid Rock Drainage (ARD) occurrence in a gold mine located in a Southeastern Brazil region

Content Provider	Scilit
Author	de Lemos Capanema, Luciana Xavier Ciminelli, Virgínia Sampaio Teixeira
Copyright Year	2003
Description	This work is aimed at evaluating the potential of Acid Rock Drainage (ARD) from two Brazilian gold sulfidic ore samples, by means of using three of the most traditional ARD prediction techniques: Standard Acid Base Accounting and Modified Acid Base Accounting, as static methods, and humidity cells, as a kinetic method. Samples were submitted to chemical and mineralogical characterization that indicated the presence of traces of sulfide minerals, such as pyrite, arsenopyrite, pyrrhotite and of carbonates, calcite and dolomite. While the Standard ABA results were inconclusive, the Modified ABA NNP results and NP/AP ratio suggested a tendency of TP01 and WP01 being acid generators, this tendency being slightly stronger for sample WP01. So, a kinetic test was conducted to elucidate the results. The humidity cells results for samples TP01 and WP01 indicated the probable sulfide oxidation to produce acid, subsequently neutralized by alkalinity generated by the carbonates. Based on the results, one can conclude that although sample WP01 has a slightly higher ARD generation potential than TP01, these samples can be at different stages of ARD process, or better, TP01 is at a more advanced stage of ARD production than WP01. The determinant role of the kinetic tests is highlighted by the results.
Related Links	http://www.scielo.br/pdf/rem/v56n3/v56n3a10.pdf http://www.scielo.br/scielo.php?script=sci_pdf&pid=S0370-44672003000300010&lng=en&nrm=iso&tlng=en
Ending Page	206
Page Count	6
Starting Page	201
ISSN	03704467
e-ISSN	18070353
DOI	10.1590/s0370-44672003000300010
Journal	Rem: Revista Escola de Minas
Issue Number	3
Volume Number	56
Language	English
Publisher	FapUNIFESP (SciELO)
Publisher Date	2003-07-01
Access Restriction	Open
Subject Keyword	Revista Escola de Minas Mining and Mineral Processing Drenagem Ácida Testes Aba Células Úmidas Acid Mine Drainage Aba Tests Humidity Cell
Content Type	Text
Resource Type	Article
Subject	Waste Management and Disposal Geology Geochemistry and Petrology Economic Geology Materials Science

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