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Wamba AGN, Lima EC, Ndi SK, Thue PS, Kayem JG, Rodembusch FS, Dos Reis GS, de Alencar WS. 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. Environ Sci Pollut Res Int 2017; 24:21807-21820. [PMID: 28776292 DOI: 10.1007/s11356-017-9825-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2017] [Accepted: 07/24/2017] [Indexed: 06/07/2023]
Abstract
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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Affiliation(s)
- Alfred G N Wamba
- 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
- Department of Process Engineering, University of Ngaoundere, Ngaoundere, Cameroon
- Department of Process Engineering, Saint Jerome Catholic University Institute, Av. Akwa Koumassi, Douala, Cameroon
| | - Eder C Lima
- 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.
| | - Sylvere K Ndi
- Department of Process Engineering, University of Ngaoundere, Ngaoundere, Cameroon
| | - Pascal S Thue
- 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
| | - Joseph G Kayem
- Department of Process Engineering, University of Ngaoundere, Ngaoundere, Cameroon
| | - Fabiano S Rodembusch
- 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
| | - Glaydson S Dos Reis
- Department of Metallurgy, Federal University of Rio Grande do Sul (UFRGS), Av. Bento Gonçalves, Porto Alegre, RS, 9500, Brazil
| | - Wagner S de Alencar
- 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
- Institute of Exact Sciences, Federal University of South and Southeast of Pará (UNIFESSPA), Marabá, PA, Brazil
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Thue PS, dos Reis GS, Lima EC, Sieliechi JM, Dotto GL, Wamba AGN, Dias SLP, Pavan FA. Activated carbon obtained from sapelli wood sawdust by microwave heating for o-cresol adsorption. Res Chem Intermed 2016. [DOI: 10.1007/s11164-016-2683-8] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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