Application of Carbon Composite Adsorbents Prepared from Coffee Waste and Clay for the Removal of Reactive Dyes from Aqueous Solutions

Journal of the Brazilian Chemical Society

Davis C. Dos Santos¹  Matthew A. Adebayo¹  Eder C. Lima¹  Simone F. P. Pereira¹  Renato Cataluña¹  Caroline Saucier¹  Pascal S. Thue¹  Fernando M. Machado¹ 

关键词: adsorption;    industrial effluents;    carbon composites;    general order kinetic model;    nonlinear isotherms;   

DOI  :  10.5935/0103-5053.20150053

来源: SciELO

【 摘 要 】

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.

【 授权许可】

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