Utilize este identificador para referenciar este registo:
https://hdl.handle.net/1822/72467
Título: | Mineralogical attenuation processes associated with the evolution of acid mine drainage in sulfide-rich mine wastes |
Autor(es): | Valente, Teresa Maria Fernandes Gomes, Patricia Braga, Maria Amália Castro Sequeira Pamplona, J. Antunes, Isabel Margarida Horta Ribeiro Ríos Reyes, Carlos Alberto Moreno, Filipa |
Palavras-chave: | Mineralogical control Scorodite Jarosite Salt efflorescences Hardpans |
Data: | 2019 |
Editora: | International Mine Water Association (IMWA) |
Citação: | Valente, T., Gomes, P., Sequeira Braga, M.A., Pamplona, J., Antunes, I.M., Ríos Reyes, C.A., Moreno, F., 2019. Mineralogical Attenuation Processes Associated with the Evolution of Acid Mine Drainage in Sulfide-Rich Mine Wastes. Proceedings of IMWA2019 - International Mine Water Association Conference - “Mine Water: Technological and Ecological Challenges”, Wolkersdorfer, Ch.; Khayrulina, E.; Polyakova, S.; Bogush, A. (Editors), Perm, Russia, 15-19 July 2019, 146-152. |
Resumo(s): | The geochemical evolution of acid mine drainage results in secondary minerals that play a key role in the environmental behavior of the mine wastes. The present work is focused on these newly formed minerals at the Penedono waste dump, characterized by fine-grained tails with pyrite and arsenopyrite. Mineralogical study led to an inventory of secondary phases, comprising soluble sulfates, scorodite, and oxyhydroxysulfates. In addition, there is amorphous Fe, As rich-nanoprecipitates. Jarosite and scorodite are abundant minerals, acting as cement for encrusting tails in Fe and As-rich hardpans. These hard structures are relatively insoluble, retaining toxic elements, thereby contributing to natural attenuation of mining contamination associated with the sulphide wastes. |
Tipo: | Artigo em ata de conferência |
URI: | https://hdl.handle.net/1822/72467 |
ISBN: | 978-5-91252-145-4 |
Versão da editora: | http://www.imwa.info/docs/imwa_2019/IMWA_2019_proceedings.pdf |
Arbitragem científica: | yes |
Acesso: | Acesso aberto |
Aparece nas coleções: | CCT - Comunicações/Communications |
Ficheiros deste registo:
Ficheiro | Descrição | Tamanho | Formato | |
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Valente_et_alia_IMWA_2019.pdf | 3,69 MB | Adobe PDF | Ver/Abrir |