Sodium Dodecyl Sulfate Impregnated Granulated Activated Charcoal for the Scavenging of Cr (VI) Metal Ions from Aqueous Solution

Heavy metals have become eco-toxicological hazards owing to their tendency to not degrade but accumulate in the vital organs of biological bodies. This paper describes the adsorption of Cr(VI) metal ions from aqueous solutions by sodium dodecyl sulfate (SDS) an adsorbed chelating species on impregnated with granular activated charcoal (GAC). The capacity of the granulated activated charcoal to adsorb Cr(VI) increased in proportion to the quantity of sodium dodecyl sulfate with which they were impregnated. The effect of various parameters influencing the Cr(VI) adsorptions such as effect of pH, Contact time have been studied. The kinetics of the adsorption of Cr(VI) onto the sodium dodecyl sulfate-impregnated granulated activated charcoal (SDS-GAC)was best described by a pseudo-second-order model, and was described better by the Freundlich adsorption isotherm and Langmuir isotherm. This method is quite feasible, economic and time saving. The optimum contact time found is equal 400 min. The results indicate that surface modification with sodium dodecyl sulfate (SDS) could be used to significantly enhance the capacity of granulated activated charcoal to adsorb Cr(VI) metal ion