New carbon composite adsorbents for the removal of textile dyes from aqueous solutions: Kinetic, equilibrium, and thermodynamic studies

• Published in: The Korean journal of chemical engineering Vol. 31; no. 8; pp. 1470 - 1479
• Main Authors: dos Santos, Davis Castro, Adebayo, Matthew Ayorinde, de Fátima Pinheiro Pereira, Simone, Prola, Lizie Daniela Tentler, Cataluña, Renato, Lima, Eder Cláudio, Saucier, Caroline, Gally, Caline Rodrigues, Machado, Fernando Machado
• Format: Journal Article
• Language: English
• Published: Boston Springer US 01.08.2014; 한국화학공학회
• Subjects: Biotechnology; Catalysis; Chemistry; Chemistry and Materials Science; Industrial Chemistry/Chemical Engineering; Materials Science; Separation Technology; Thermodynamics; 화학공학; Pyrolysis; Aqueous Effluents; Adsorption; General Order Kinetic Model; Carbon Composite
• ISSN: 0256-1115; 1975-7220
• DOI: 10.1007/s11814-014-0086-3

New carbon composite materials were prepared by pyrolysis of mixture of coffee wastes and red mud at 700 °C with the inorganic: organic ratios of 1.9 (CC-1.9) and 2.2 (CC-2.2). These adsorbents were used to remove reactive orange 16 (RO-16) and reactive red 120 (RR-120) textile dyes from aqueous solution. The CC-1.9 and CC-2.2 materials were characterized using Fourier transform infrared spectroscopy, Nitrogen adsorption/desorption curves, scanning electron Microscopy and X-ray diffraction. The kinetic of adsorption data was fitted by general order kinetic model. A three-parameter isotherm model, Liu isotherm model, gave the best fit of the equilibrium data (298 to 323 K). The maximum amounts of dyes removed at 323 K were 144.8 (CC-1.9) and 139.5 mg g −1 (CC-2.2) for RO-16 dye and 95.76 (CC-1.9) and 93.80 mg g −1 (CC-2.2) for RR-120 dye. Two simulated dyehouse effluents were used to investigate the application of the adsorbents for effluent treatment.