Congo Red Removal From Aqueous Solutions by Ion ExchangerAmberliteLA-2
Keywords:Congo red dye, liquid‒liquid extraction, Amberlite LA-2, distribution coefficients, loading capacity, extraction efficiency
Amberlite LA-2 was used as an ion exchanger to remove Congo red dye from aqueous solution. The effect of the initial concentration of dye and the initial concentration of Amberlite LA-2 on the efficiency of dye removal from the aqueous phase to the organic phase at different contact times, temperatures and pH values was studied. this research aims to study the potential of using Amberlite LA-2 as an extracting material for Congo red dye removal. UV-visible Spectrophotometer were used to assay the dye concentration in the aqueous solution before and after removal. Distribution coefficients (KD), loading capacity (Z), and extraction efficiency (E%) were computed using experimental data. The maximum extraction efficiency of 99.69 % was obtained with a loading capacity of 384.366 mol/kg. The obtained results also indicated that the removal of dye increases with the increase in the concentration of Amberlite LA-2. The best removal was obtained in a neutral medium (pH = 7), a temperature of 20 oC. A mechanism of extraction by Amberlite LA-2 was also proposed.
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