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Synthesis of grafted natural pozzolan with 3-aminopropyltriethoxysilane: preparation, characterization, and application for removal of Brilliant Green 1 and Reactive Black 5 from aqueous solutions.
Wamba, Alfred G N; Lima, Eder C; Ndi, Sylvere K; Thue, Pascal S; Kayem, Joseph G; Rodembusch, Fabiano S; Dos Reis, Glaydson S; de Alencar, Wagner S.
Afiliação
  • Wamba AGN; Institute of Chemistry, Federal University of Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9500, P.O. Box 15003, Porto Alegre, RS, 91501-970, Brazil.
  • Lima EC; Department of Process Engineering, University of Ngaoundere, Ngaoundere, Cameroon.
  • Ndi SK; Department of Process Engineering, Saint Jerome Catholic University Institute, Av. Akwa Koumassi, Douala, Cameroon.
  • Thue PS; Institute of Chemistry, Federal University of Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9500, P.O. Box 15003, Porto Alegre, RS, 91501-970, Brazil. profederlima@gmail.com.
  • Kayem JG; Department of Process Engineering, University of Ngaoundere, Ngaoundere, Cameroon.
  • Rodembusch FS; Institute of Chemistry, Federal University of Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9500, P.O. Box 15003, Porto Alegre, RS, 91501-970, Brazil.
  • Dos Reis GS; Department of Process Engineering, University of Ngaoundere, Ngaoundere, Cameroon.
  • de Alencar WS; Institute of Chemistry, Federal University of Rio Grande do Sul (UFRGS), Av. Bento Gonçalves 9500, P.O. Box 15003, Porto Alegre, RS, 91501-970, Brazil.
Environ Sci Pollut Res Int ; 24(27): 21807-21820, 2017 Sep.
Article em En | MEDLINE | ID: mdl-28776292
Natural pozzolan is an amorphous silicate-based material of volcanic origin. In this work, the natural pozzolan was modified by using 3-aminopropyltriethoxysilane (APTES) as a grafting agent. This material was characterized by pHpzc, N2 adsorption/desorption curves, FTIR, TGA/DTG, DRUV, SEM, and elementary analysis. The functionalized materials were used for the removal of Reactive Black 5 (RB-5) and Brilliant Green 1 (BG-1) dyes from aqueous solutions using batch-contact adsorption. The characterization of modified pozzolan by FTIR, TGA/DTG, BET, and DRUV-vis revealed the effectiveness of grafting of amine functional group on pozzolan structure. The kinetic adsorption data were better fitted with general order for both dyes while for equilibrium models were better fitted by the Liu isotherm model. The maximum sorption capacities Q max (at 50 °C) obtained with the modified pozzolan were 350.6 and 300.9 mg g-1 for BG-1 and RB-5, at pH 9.0 and 2.0, respectively. The thermodynamic parameters show that the removal of dyes was spontaneous and endothermic. The modified material was also tested for the treatment of simulated dye house effluents showing very high efficiency.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Propilaminas / Silanos / Compostos de Amônio Quaternário / Naftalenossulfonatos Idioma: En Revista: Environ Sci Pollut Res Int Assunto da revista: SAUDE AMBIENTAL / TOXICOLOGIA Ano de publicação: 2017 Tipo de documento: Article País de afiliação: Brasil País de publicação: Alemanha
Texto completo
Adicionar na Minha BVS
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XML
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Propilaminas / Silanos / Compostos de Amônio Quaternário / Naftalenossulfonatos Idioma: En Revista: Environ Sci Pollut Res Int Assunto da revista: SAUDE AMBIENTAL / TOXICOLOGIA Ano de publicação: 2017 Tipo de documento: Article País de afiliação: Brasil País de publicação: Alemanha