ZnO-SiO 2 (ZSnc) nanoadsorbent was prepared by sol-gel method in the presenceof SDS as anionic surfactant (10-3 , 6 x 10-4 , and 10-4 mol/l),for removing methylene blue (MB) from wastewater. The papered nanomaterials were characterized by XRD, TEM and surface area analysis. The factors affecting adsorption were thoroughly investigated and optimized. The mechanisms and kinetics of adsorption were explored.

Adsorption assessment of ZnO-SiO 2 (ZSnc) by UV/Vis spectro-photometery was used to monitor the removal of the cationic dye (MB)from waste waters. Silica nanoparticles with a high adsorption capacitywere prepared by sol-gel method. SiO 2 modification was done bydissolving various ratios of zinc oxides at 10%, 30%, 50%, 70% and 90%.With a view to explain the adsorptive characteristics, they were portrayed by XRD, TEM, EDX, SEM, N 2 adsorption/desorption isotherms techniques and FT-IR. The results showed that anamorphous shape and porous structure were obtained by the sol-gel method. The calcination time of nanomaterial and concentration of MB have a significant effect on the adsorption efficiency. The equilibrium data were evaluated using the Langmuir and Freundlich isotherms in order to determine the best adjustment to the experimental data. Langmuir model has been the most appropriate for fitting the experimental data. Additionally, the adsorption kinetics is best described by the pseudo-second order model at a different concentration. Values demonstrated that the adsorption process is exothermic, spontaneous, and favorable. The results elucidated the potential for a new utilize of mesostructured nanomaterial as an active adsorbent.