Color removal from synthetic dye and textile wastewaters using adsorbent prepared from psyllium husk

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Date
2012-06-01
Authors
Somaia M. O. Tayeh
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Color removal from textile effluents has been given much attention in the last few years by the adsorption process using low cost adsorbents. In this study, psyllium husk/CoFe2O4 adsorbent, (PH/CFO), was synthesized by a simple one-step refluxing route and was used as adsorbent for the removal of color from synthetic dye solution and textile wastewater. The batch experiments showed that the best removal efficiency of the adsorbent was at pH 9.0, temperature 30oC (for synthetic wastewater) and at 40oC (for textile wastewater), shaking rate 150 rpm (for synthetic wastewater) and 280rpm (for textile wastewater), and at contact time 2 hours. The PH/CFO adsorbent showed higher removal efficiency at higher initial dye concentrations. At the same time, the adsorbent efficiency was increasing by decreasing the amount of adsorbent used. The experimental data fitted well with the Langmuir model with a monolayer adsorption capacity of 188.7mg/g. The adsorption kinetics was found to follow pseudo-second-order kinetic model. The particle size analysis and SEM observations of prepared and spent adsorbent where carried out, particle size analysis showed a homogenous particle size distribution for both samples. SEM observations showed that the dye particles deposited uniformly onto the surface of PH/CFO adsorbent.
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