نوع مقاله : پژوهشی
نویسندگان
1 دانشیار گروه علوم خاک، دانشکده کشاورزی، دانشگاه ملایر، ملایر، ایران
2 دانشگاه ملایر، ملایر ایران
3 دانشگاه ملایر، ملایر ، ایران
4 دانشگاه ملایر، ملایر، ایران
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسندگان [English]
Abstract
This study investigated the efficiency of iron oxide and hydroxyapatite nanoparticles in removing the industrial dye Remazol Black B from aqueous solutions via adsorption. Experiments were conducted under varying conditions of pH, temperature, contact time, and adsorbent dosage. Iron oxide nanoparticles achieved 78.50% removal efficiency at pH 3, 35 °C, and 180 minutes, while nano-hydroxyapatite showed 53.75% efficiency at 15 °C and 20 minutes. The adsorption process for both followed the pseudo-second-order kinetic model and Freundlich isotherm, indicating chemical adsorption and heterogeneous surface interaction. Thermodynamic analysis revealed spontaneous adsorption in both cases: endothermic for iron oxide and exothermic for hydroxyapatite. The adsorption capacities were 22.46 and 25.36 mg/g, respectively. These results confirmed the potential of these nano-adsorbents for dye removal and provided insights into their thermodynamic behavior and relative performance. Each adsorbent, depending on operational conditions, offers specific advantages and can serve as an effective material for removing anionic dyes from industrial wastewater, supporting the development of sustainable and efficient treatment systems.
کلیدواژهها [English]
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