نوع مقاله : مقاله پژوهشی
نویسندگان
گروه شیمی، دانشکده علوم پایه، دانشگاه بینالمللی امام خمینی(ره)، قزوین، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
In this study, a nanocomposite hydrogel was synthesized based on gelatin and nickel oxide nanoparticles using acrylamide (AAm) and 2-Acrylamido-2-methylpropane sulfonic acid (AMPS) by radical polymerization method. The reaction was performed in the presence of ammonium presulfate as an initiator and methylene bis acrylamide as a crosslinker. The structure of nanocomposite hydrogels were characterized by Fourier transform infrared spectroscopy (FT-IR), thermal gravimetric analysis (TGA), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Crystal violet was selected as a template for cationic dyes. The adsorption was optimized by changing various parameters such as contact time, temperature, pH, and initial concentration of dye. In optimal conditions, the maximum amount of dye adsorption from aqueous solutions at low concentrations (10 ppm) was approximately 97.5%, and at high concentrations (700 ppm) was about 99.5%. The results of this study showed that the hydrogels can be applied as efficient absorbent for the removal of cationic dyes from aqueous solutions. The adsorption process follows Langmuir isotherm model and pseudo second order kinetic.
کلیدواژهها [English]