Fig.12. The removal efficiency during seven repetition usage of MAC nano-composite. Conditions: 10 ml. of the dye solution (70 mg L): 100 mg of MAC nano-composite: Sample 's pH =2.0: desorption =5 ml of ethanol Inset in figure shows photographs of aqueous solutions of ARS (a) before adsorption. (b) after adsorption and (c) after seven cycles of desorption-adsorption. external magnetic field, which can be collected from the solution using a magnet of 4000 Gs (inset in Fig. 12). The results showed that MAC nano-composite can be regenerated by ethanol and reused for at least four successive removal processes with removal efficiency higher that 90% (Fig. 12). Therefore, the MAC nano-composite can be potentially used as a magnetic adsorbent to remove dye contaminants from water. A comparison was carried out between the results of the performance of proposed sorbent with those reported in previous studies. As can be seen from Table 4. The sorption capasity of MAC nano-composite is higher than those of magnetic chitosan [41]. AC [44]. cynodon dactylon [45] and mustard husk [46], comparable with gold nanoparticles-AC [47], but lower than that of multiwalled carbon nanotubes [48], and modified nano-sized silica [49], Additionally, the inherent magnetic property of MAC nano-composite make it more efficient sorbent for the removal of ARS from aqueous solution