Co adsoption in kaolinite

Autores

  • Eliel Silva Souza Instituto de Pesquisas Energéticas e Nucleares image/svg+xml
  • Paulo Sergio Cardoso Silva Instituto de Pesquisas Energéticas e Nucleares image/svg+xml

DOI:

https://doi.org/10.15392/bjrs.v7i2A.658

Palavras-chave:

Cobalt, adsorption, kaolinite

Resumo

Adsorption of metal ions in clay minerals has been used as an alternative to water and effluents treatment. Kaolinite is a clay mineral that presents low specific surface area and exchange ion capacity. Nevertheless, structural modifications can be achieved by means of acid or thermal activation. In this paper, it was studied the surface area of kaolinite/bentonite, kaolinite/activated carbon mixtures, thermal activated kaolinite and thermal activated kaolinite/activated carbon mixture. The mixture of kaolinite/activated carbon was tested for pH, contact time, interfering ions and initial concentration effects in the cobalt adsorption. Results showed that the optimized parameters are pH 6 and contact time of 30 min. Chromium acted as a competitive ion, zinc does not appear to have affected adsorption while iron seems to have favored it. Langmuir and Freundlich isotherms indicated that the adsorption of Co in the mixture of kaolinite/activated carbon is a spontaneous process.

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Publicado

19-02-2019

Edição

v. 7 n. 2A (Suppl.) (2019): ENAN 2017

Seção

The Meeting on Nuclear Applications (ENAN)

Licença

Direitos autorais (c) 2021 Brazilian Journal of Radiation Sciences

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Como Citar

Co adsoption in kaolinite. Brazilian Journal of Radiation Sciences, Rio de Janeiro, Brazil, v. 7, n. 2A (Suppl.), 2019. DOI: 10.15392/bjrs.v7i2A.658. Disponível em: https://bjrs.org.br/revista/index.php/REVISTA/article/view/658. Acesso em: 16 jul. 2025.