Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.9/2166
Título: Acid mine drainage from the Panasqueira mine and its influence on Zêzere river (Central Portugal)
Autor: Candeias, Carla
Ávila, Paula Freire
Silva, Eduardo Ferreira da
Ferreira, Adelaide
Salgueiro, Ana Rita
Teixeira, João Paulo
Palavras-chave: Actividade mineira
Poluição do ambiente
Resíduos mineiros
Drenagem ácida mineira
Hidrogeoquímica
Minas da Panasqueira (Portugal)
Rio Zêzere (Portugal)
Portugal (Centro)
Data: 2014
Citação: Candeias, Carla... [et al.] - Acid mine drainage from the Panasqueira mine and its influence on Zêzere river (Central Portugal). In: Journal of African Earth Sciences, Vol. 99 (2014), p. 705-712
Resumo: The Panasqueira hydrothermal mineralization, located in central Portugal, is the biggest Sn–W deposit of the Western Europe. The main evidences of the mining exploitation and ore treatment operations are testified with huge tailings, mainly, in the Rio and Barroca Grande areas. The mining and beneficiation processes, at the site, produces metal rich mine wastes. Oxidation of sulfides tailings and flow from open impoundments are responsible for the mobilization and migration of metals from the mine wastes into the environment. Acid mine drainage (AMD) discharged from Rio tailing has a pH around 3 and high metal concentrations. In Zêzere river, Fe and As are the most rapidly depleted downstream from AMD once As adsorbs, coprecipitate and form compounds with iron oxyhydroxides. The Zêzere river waters are oversaturated with respect to kaolinite and goethite and ferrihydrite can precipitate on stream with a near-neutral pH. At sites having low pH the dissolved Fe species in the water, mainly, occur as sulfate complexes due to a high SO4 concentration. Melanterite (Fe2+(SO4)·7(H2O)) and minor amounts of rozenite (Fe2+(SO4)·4(H2O)) and szomolnokite (Fe2+(SO4)·(H2O)) were observed on Rio tailing basement.
Descrição: Available online 25 October 2013
URI: http://hdl.handle.net/10400.9/2166
ISSN: 1464-343X
Versão do Editor: http://dx.doi.org/10.1016/j.jafrearsci.2013.10.006
Aparece nas colecções:CTM - Artigos em revistas internacionais

Ficheiros deste registo:
Ficheiro Descrição TamanhoFormato 
36467_p1.pdf950,3 kBAdobe PDFVer/Abrir


FacebookTwitterDeliciousLinkedInDiggGoogle BookmarksMySpace
Formato BibTex MendeleyEndnote Degois 

Todos os registos no repositório estão protegidos por leis de copyright, com todos os direitos reservados.