Environmental Science and Pollution Research

, Volume 24, Issue 27, pp 21807–21820 | Cite as

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

  • Alfred G. N. Wamba
  • Eder C. LimaEmail author
  • Sylvere K. Ndi
  • Pascal S. Thue
  • Joseph G. Kayem
  • Fabiano S. Rodembusch
  • Glaydson S. dos Reis
  • Wagner S. de Alencar
Research Article


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.


Natural pozzolan 3-Aminopropyltriethoxysilane (APTES) Dyes Adsorption Nonlinear fitting Thermodynamic of adsorption 



The authors gratefully thank the Academy of Sciences for Developing World (TWAS, Italy), the National Council for Scientific and Technological Development (CNPq, Brazil), and the Coordination of Improvement of Higher Education Personnel (CAPES, Brazil) for financial support of this work. We are also grateful to Chemaxon for giving us an academic research license for the Marvin Sketch software, Version 17.13.0,(, 2017, used for dye physical–chemical properties.

Supplementary material

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Supplementary Fig. 1 (PDF 496 kb).
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Supplementary Fig. 3 (PDF 397 kb).
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Supplementary Fig. 4 (PDF 413 kb).
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Supplementary Fig. 5 (PDF 465 kb)
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Supplementary Fig. 6 (PDF 507 kb).
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Supplementary Fig. 7 (PDF 499 kb).


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Copyright information

© Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  • Alfred G. N. Wamba
    • 1
    • 2
    • 3
  • Eder C. Lima
    • 1
    Email author
  • Sylvere K. Ndi
    • 2
  • Pascal S. Thue
    • 1
  • Joseph G. Kayem
    • 2
  • Fabiano S. Rodembusch
    • 1
  • Glaydson S. dos Reis
    • 4
  • Wagner S. de Alencar
    • 1
    • 5
  1. 1.Institute of ChemistryFederal University of Rio Grande do Sul (UFRGS)Porto AlegreBrazil
  2. 2.Department of Process EngineeringUniversity of NgaoundereNgaoundereCameroon
  3. 3.Department of Process EngineeringSaint Jerome Catholic University InstituteDoualaCameroon
  4. 4.Department of MetallurgyFederal University of Rio Grande do Sul (UFRGS)Porto AlegreBrazil
  5. 5.Institute of Exact SciencesFederal University of South and Southeast of Pará (UNIFESSPA)MarabáBrazil

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