Experimental and modelling studies on As(III) removal from aqueous medium on fixed bed column [articol]

Abstract

A continuous adsorption study in a fixed-bed column was carried out by using IS:sand mixture as an adsorbent for the removal of As(III) from aqueous solution. The column experiments were conducted to study the effect of important parameters such as flow rate and bed depth on breakthrough curve and adsorption capacity. The Bed Depth Service Timemodel (BDST) was applied to the experimental data to represent the breakthrough curve and determine the characteristic design parameters of the column. The calculated adsorption capacity (N0) and the rate constant (K) were 55.2 mg/cm3 and 12.2 cm3/mg/h, respectively. It can be noticed that the IS:sand mixture can be used with good performances as adsorbent material in the removal process of As(III) on column studies.