Sonocatalytic Degradation of Methyl Orange Using Zinc Sulfide Carbon ‎Nanotubes

Dye sewage is dangerous problem in our environmental aquatics that cause generation of harmful ‎effects for living organism. In this work, because of simplicity, easy operation, high efficiency and no ‎creating secondary pollutants, ultra sound radiation applied for degradation of a synthetic dye, methyl ‎orange using zinc sulfide nano particles decorated on carbon nanotubes as nanocatalyst. ZnS/CNTs ‎prepared by co-precipitation of carbon nanotubes and zinc aceate. Methyl orange (MO) is a cationic ‎dye that used widely in some medical uses, coloring paper, dyeing cottons, wools, coating for paper ‎stocks and etc. For achieving highest degradation efficiency several parameters such as pH, amount of ‎nanocatalyst, initial dye concentration and time were evaluated and optimized. Results showed that ‎highest degradation efficiency (100%) obtained at 0.3 gr of nanocatalyst while initial dye concentration ‎is 30 mg.L-1 at pH, 2. Comparison of several methods for degradation of methyl orange showed ‎feasibility of applied method. In addition, reusability of nanocatalyst was suitable for degradation of ‎MO in real wastewater samples