The adsorption kinetics and removal of cationic dye, Toluidine Blue O, from aqueous solution with Turkish zeolite
| Autor: | Şenol Alpat, Sibel Kılınç Alpat, Özge Özbayrak, Hüsamettin Akçay |
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| Rok vydání: | 2006 |
| Předmět: |
Langmuir
Environmental Engineering Time Factors Health Toxicology and Mutagenesis Diffusion Waste Disposal Fluid Adsorption Water Pollution Chemical Environmental Chemistry Freundlich equation Tolonium Chloride Zeolite Waste Management and Disposal Clinoptilolite Aqueous solution Chromatography Chemistry Temperature Hydrogen-Ion Concentration Pollution Kinetics Zeolites Thermodynamics Particle size Nuclear chemistry |
| Zdroj: | Journal of hazardous materials. 151(1) |
| ISSN: | 0304-3894 |
| Popis: | Clinoptilolite, a natural zeolite, was investigated as an inexpensive and effective adsorbent for the adsorption of Toluidine Blue O (TBO) from its aqueous solution. The effect of parameters such as the initial concentration of TBO, the solution of pH, contact time, temperature and particle size on the TBO adsorption was examined. The adsorption rate data were analysed according to the first and second-order kinetic models. Kinetic studies show that adsorption of TBO on clinoptilolite was fitted to the second-order adsorption model with two-step diffusion process. The activation energies for TBO adsorption on clinoptilolite for the first and second diffusion processes were 8.72 kJ mol(-1) and 19.02 kJ mol(-1), respectively. The adsorption isotherm was well fitted to both the Langmuir and Freundlich models. The maximum adsorption capacity of clinoptilolite for TBO was 2.1 x 10(-4) mol g(-1) at solution pH of 11.0. (c) 2007 Elsevier B.V. All rights reserved. |
| Databáze: | OpenAIRE |
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