Kinetic and equilibrium studies on the adsorption of calcium lignosulfonate from aqueous solution by coal fly ash

Experiments were performed to determine the adsorption of calcium lignosulfonate (CLS) onto Shand and Boundary Dam (BD) coal fly ashes. The results showed that both Shand and BD fly ashes exhibited potential for CLS adsorption. The removal efficiency increased with increasing adsorbent dosage and the maximum was obtained in the dosage of 20g/L. Adsorption processes were time-dependent and the maximum adsorption capacity was achieved in the …