نوع مقاله : مقاله پژوهشی
نویسندگان
1 گروه آموزشی صنایع کاربردی، دانشگاه ملی مهارت، تهران، ایران، صندوقپستی: 1435763811
2 گروه آموزشی هنر، دانشگاه ملی مهارت، تهران، ایران، صندوقپستی: 1435763811
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
In this research, walnut shell was utilized as a raw material for the production of activated carbon through chemical synthesis using phosphoric acid. The main objective was to explore the efficacy of this natural adsorbent in the extraction of Disperse Red 167 (DR167) dye from textile wastewater. The physical and chemical properties of the adsorbent were examined using BET, SEM, and elemental analysis methods. Several factors, including pH, contact duration, initial dye concentration, and temperature, were analyzed for their effect on the adsorption process. Both adsorption isotherms and pseudo-first-order as well as pseudo-second-order kinetic models were employed to interpret the experimental data. The findings demonstrated that the produced adsorbent has a high specific surface area and a porous configuration, making it effective in dye removal. The pseudo-second-order kinetic model yielded the best correlation with the data. Thermodynamic investigations indicated that the adsorption process is endothermic and occurs spontaneously. The isosteric heat of adsorption at lower levels of coverage for the synthesized sample was measured at 54.4 kJ/mol, reflecting the physicochemical characteristics and surface variability of the activated carbon.
کلیدواژهها [English]