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Application of carbon composite adsorbents prepared from coffee waste and clay for the removal of reactive dyes from aqueous solutions

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Application of carbon composite adsorbents prepared from coffee waste and clay for the removal of reactive dyes from aqueous solutions

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Título Application of carbon composite adsorbents prepared from coffee waste and clay for the removal of reactive dyes from aqueous solutions
Autor Santos, Davis Castro dos
Adebayo, Matthew Ayorinde
Lima, Éder Cláudio
Pereira, Simone de Fátima Pinheiro
Cataluña, Renato
Saucier, Caroline
Thue, Pascal Silas
Machado, Fernando Machado
Abstract A novel carbon composite was prepared from a mixture of coffee waste and clay with inorganic:organic ratio of 1.3 (CC-1.3). The mixture was pyrolysed at 700 °C. Considering the application of this adsorbent for removal of anionic dyes, the CC-1.3 was treated with a 6 mol L−1 HCl for 24 h to obtain ACC-1.3. Fourier transform infrared (FTIR), N2 adsorption/desorption curves, scanning electron microscope (SEM) and powder X-ray diffractometry (XRD) were used for characterisation of CC-1.3 and ACC-1.3 carbon adsorbents. The adsorbents were effectively utilised for removal of reactive blue 19 (RB-19) and reactive violet 5 (RV-5) textile dyes from aqueous solutions. The maximum amounts of RB-19 dye adsorbed at 25 °C are 63.59 (CC-1.3) and 110.6 mg g−1 (ACC-1.3), and 54.34 (CC-1.3) and 94.32 mg g−1 (ACC-1.3) for RV-5 dye. Four simulated dye-house effluents were used to test the application of the adsorbents for treatment of effluents.
Contido em Journal of the Brazilian Chemical Society. São Paulo. Vol. 26, no. 5 (May 2015), p. 924-938
Assunto Adsorcao
Materiais compositos
Tratamento de efluentes
[en] Adsorption
[en] Carbon composites
[en] General order kinetic model
[en] Industrial effluents
[en] Nonlinear isotherms
Origem Nacional
Tipo Artigo de periódico
URI http://hdl.handle.net/10183/129934
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