SciELO - Scientific Electronic Library Online

 
vol.14 número1Purificación preliminar de antocianinas de maíz azul por adsorción y electroforesisEficiencias comparativas de inactivación de bacterias coliformes en efluentes municipales por fotólisis (UV) y por fotocatálisis (UV/TiO2/SiO2). Caso: depuradora de aguas de Salamanca, España índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

  • Não possue artigos similaresSimilares em SciELO

Compartilhar


Revista mexicana de ingeniería química

versão impressa ISSN 1665-2738

Resumo

GARCIA-ARREOLA, M.E. et al. Comparison of static leaching essays of toxic elements in tailings. Rev. Mex. Ing. Quím [online]. 2015, vol.14, n.1, pp.109-117. ISSN 1665-2738.

Mining is still one of the main economic activities in Mexico. However, mineral exploitation is extensive, leading to a considerable generation of waste that has accumulated without any control. The present study used historical tailings from Guanajuato mining district, in the town, of Monte San Nicolas and Peregrina. Batch leaching tests were performed with three different methodologies: PECT method (extraction procedure toxic constituents) described in the NOM-053-SEMARNAT-1993, the NOM-141-SEMARNAT-2003 (CO2 acidified water) and the SPLP (Synthetic Precipitation leaching Procedure) 1312 (EPA, 1989). The elements studied were: As, Pb, Mn, Zn, Cd and Cr. According to variance analysis, there were significant differences between the types of extractant. The results show that the release of Pb and Zn in the waste is a function of the pH of the extractant. The release for As, Zn, Cd and Cr depend on the degree of adsorption to manganese and aluminum oxides. For all elements studied the release was greater with the TCLP extract, influenced by the acidity and the organic ligand.

Palavras-chave : leaching; waste mining; metals; tailing; static leaching test.

        · resumo em Espanhol     · texto em Espanhol     · Espanhol ( pdf )

 

Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons