Abstract

A continuous flow in a fixed - bed column was studied by using barley straw adsorption for Cd (II) removal from aqueous solution. The effects of various parameters like initial concentration of cadmium, bed height and flowrate were examined in this study. The column experimental data were conformed to Thomas, Yoon-Nelson and Bed Depth Service Time (BDST) models. The experimental data fit well with the BDST and Thomas models in the initial region of the break-through time curve. The maximum adsorption capacity related to Thomas model was found to be 6.808 mg/g of initial concentration of 30 ppm, at a flow-rate of 3 ml/min, a bed height of 20 cm, and at pH 6. © by PSP.