Removal of Mordant Green 17 and Acid Fast Red from Water using Nanokaolin

Abstract

Increasing concentrations of dyes including mordant green17 and acid fast RN in surface and groundwater are a major environmental concern in recent years. In this research, the potential of nanokaolin for efficient removal of MG17 and AFR residue from aqueous solutions was investigated. For this purpose, nanoKaolin was characterized by XRD, surface area and TEM techniques. Effect of various parameters such as contact time, adsorbent dosage, initial concentration of MG17 and AFR and temperature on adsorption of MG17 and AFR on nanokaolin was investigated. The results showed that the best condition for removal of MG17 and AFR was exhibited at contact time 90 min and adsorbent dosage 1g/L. the removal of MG17 and AFR decreased with the increase of initial concentration. Langmuir and Freundlich isotherm models were applied to the equilibrium data. Kinetic study applied pseudo first and second order   Results indicate the potential of nanokaolin for removal of MG17 and AFR from aqueous solutions.