Removal of 2, 4‐D from aqueous solution by the adsorbents from spent bleaching earth |
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Authors: | Mehmet Mahramanlio?lu ?rfan Kizilcikli ? Özlem Biçer Melda Tunçay |
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Institution: | Engineering Faculty, Chemistry Department , ístanbul University , Avcilar, ístanbul, 34850, Turkey |
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Abstract: | Abstract The removal of 2, 4‐D (2, 4‐ dichlorophenoxyacetic acid) from aqueous solutions by activated spent bleaching earths (SBE) was studied at 20 °C. Experiments were performed as a function of time, initial concentration, dose and particle size of the adsorbent. The Langmuir and Freundlich adsorption equations were fitted by the adsorption data obtained. The values of Langmuir and Freundlich constants were determined. The adsorption kinetic was found to follow Lagergren equation. Both the boundary layer and intraparticle diffusion played important roles in the adsorption rate of 2, 4‐D. As the size of the adsorbent increased, the time to reach equilibrium increased but adsorption capacity decreased. |
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Keywords: | Pesticides 2 4‐D adsorption of pesticides spent bleaching earth boundary layer and intraparticle diffusion |
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