Preparation of composite bead from surfactant-modified montmorillonite clay for reactive black5 dye adsorption
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Abstract
The objective of this research is to develop a composite bead composed of cationic surfactant modified montmorillonite clay (OMMT) and chitosan (CTS) as an adsorbent for the adsorption of reactive black 5 dye (RB5). To determine the optimum composition of the composite bead for maximum dye removal from aqueous solution, Box-Behnken surface statistical design with three factors and three-level and response surface methodology was used. There were three factors used: mass of the surfactant (Tetradecyltrimethylammonium bromide, TTAB), the mass of OMMT, and the mass of CTS. The batch adsorption tests were performed under the following conditions: 0.1 g of composite bead, 100 mL of RB5 solution, an agitation speed of 300 rpm, a contact time of 24 hours, and a room temperature. The experimental results revealed that all three factors had a positively effect on the removal of RB5. The removal is heavily influenced by the mass of CTS. The optimum composite bead composition was found to be 0.33 g of TTAB, 0.18 g of OMMT, and 0.036 g of CTS with a predicted dye removal of 80.27 percent.
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