Application of Carbon Composite Adsorbents Prepared from Coffee Waste and Clay for the Removal of Reactive Dyes from Aqueous Solutions
AUTOR(ES)
Santos, Davis C. dos, Adebayo, Matthew A., Lima, Eder C., Pereira, Simone F. P., Cataluña, Renato, Saucier, Caroline, Thue, Pascal S., Machado, Fernando M.
FONTE
J. Braz. Chem. Soc.
DATA DE PUBLICAÇÃO
2015-05
RESUMO
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.
Documentos Relacionados
- Elimination of dyes from aqueous solutions using iron oxides and chitosan as adsorbents: a comparative study
- Preparation and application of a magnetic composite (Mn3O4/Fe3O4) for removal of As(III) from aqueous solutions
- PREPARING AGRICULTURAL RESIDUE BASED ADSORBENTS FOR REMOVAL OF DYES FROM EFFLUENTS - A REVIEW
- Removal of Cd+2 from aqueous solutions onto polypyrrole coated reticulated vitreous carbon eletrodes
- Removal of Cd+2 from aqueous solutions onto polypyrrole coated reticulated vitreous carbon eletrodes