Removal of Disperse Dye from Aqueous Solution by Bottom Ash

The uses of low-cost adsorbents such as bottom ash have been investigated as a replacement for the current expensive methods of removing dyes from aqueous solution. The adsorbent was obtained from the waste hospital (Mascara, Algeria). The prepared adsorbent was characterized and applied for the removal of synthetic dye, namely, Disperse Yellow 3. The adsorbent was characterized by Fluorescence X, Scanning electron microscopy (SEM) and Brunauer, Emmett and Teller (BET) method. The results indicated that this material consisted of silica as major constituents. The adsorption data are fitted with the linear forms of the Langmuir and Freundlich models. Langmuir adsorption isotherm fitted the data better than the Freundlich model. The adsorption reaction follows the pseudo-second-order kinetic.