New carbon composite adsorbents for the removal of textile dyes from aqueous solutions: Kinetic, equilibrium, and thermodynamic studies
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 sol...
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Published in | The Korean journal of chemical engineering Vol. 31; no. 8; pp. 1470 - 1479 |
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Main Authors | , , , , , , , , |
Format | Journal Article |
Language | English |
Published |
Boston
Springer US
01.08.2014
한국화학공학회 |
Subjects | |
Online Access | Get full text |
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Summary: | 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. |
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Bibliography: | G704-000406.2014.31.8.022 |
ISSN: | 0256-1115 1975-7220 |
DOI: | 10.1007/s11814-014-0086-3 |