Please use this identifier to cite or link to this item: http://www.repositorio.ufop.br/handle/123456789/5899
Title: Batch removal of manganese from acid mine drainage using bone char.
Authors: Sicupira, Dalila Chaves
Silva, T. Tolentino
Leão, Versiane Albis
Mansur, Marcelo Borges
Keywords: Manganese
Bone char
Acid mine drainage
Adsorption
Issue Date: 2014
Citation: SICUPIRA, D. C. et al. Batch removal of manganese from acid mine drainage using bone char. Brazilian Journal of Chemical Engineering, v. 31, p. 195-204, 2014. Disponível em: <http://www.scielo.br/pdf/bjce/v31n1/18.pdf>. Acesso em: 12 nov. 2015.
Abstract: The present study investigated batch kinetics and the batch equilibrium of manganese removal from acid mine drainage (AMD) using bone char as an adsorbent. Equilibrium tests revealed that the Langmuir-based maximum manganese uptake capacity was 22 mg g-1 for AMD effluents and 20 mg g-1 for laboratory solutions at a pH ranging from 5.5 to 5.7. The pseudo-second order model best described the manganese kinetics within bone char. Manganese removal was mainly influenced by the operating variables of the solid/liquid ratio and the pH of the aqueous phase. In fact, metal uptake was favored at nearly neutral pH values. The effect of particle size and temperature proved to be insignificant for the investigated operating range. This work also evaluated the mechanism for manganese removal using bone char. Results showed that intraparticle diffusion is the main rate-limiting step; however, additional contributions from boundary layer diffusion may well affect this removal when particles of smaller sizes are used. The final concentration of fluoride and other metals present in the AMD effluent was in agreement with the concentration limit set forth by Brazilian legislation. The present study demonstrated that bone char is a suitable material to be used for the removal of manganese from AMD effluents.
URI: http://www.repositorio.ufop.br/handle/123456789/5899
ISSN: 01046632
metadata.dc.rights.license: Todo o conteúdo do periódico Brazilian Journal of Chemical Engineering, exceto onde identificado, está licenciado sob uma licença Creative Commons que permite copiar, distribuir e transmitir o trabalho em qualquer suporte ou formato desde que sejam citados o autor e o licenciante. Fonte: <http://www.scielo.br/scielo.php?script=sci_serial&pid=0104-6632&lng=en&nrm=iso>. Acesso em: 21 out. 2015.
Appears in Collections:DEMET - Artigos publicados em periódicos

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