Adsorption of Methyl orange dye from Water solutions by carboxylate group functionalized multi-walled Carbon nanotubes
محل انتشار: مجله بین المللی ابعاد نانو، دوره: 6، شماره: 3
سال انتشار: 1394
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 116
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شناسه ملی سند علمی:
JR_IJND-6-3_002
تاریخ نمایه سازی: 24 تیر 1401
چکیده مقاله:
The present study was carried out to investigate the potential of carboxylate group functionalized Multi-walled carbon nanotubes (MWCNT−COOH) adsorbent for the removal of Methyl orange (MO) textile dye from aqueous solutions. The effects of pH, shaking time and temperature on adsorption capacity were studied; the contact time to obtain equilibrium at ۲۹۸ ˚K was fixed at ۲۵ min. The effect of temperature on adsorption process was evaluated from ۲۹۸ to ۳۳۸ ˚K. Results showed that removal of Methyl orange increased with increasing contact time and decreased with increasing pH and temperature. For Methyl orange dye, the equilibrium data were best fitted to The Langmuir isotherm model. The adsorbent was characterized by infrared spectroscopy, and scanning electron microscopy. The pseudo-second-order kinetic model provided the best fit to the experimental data compared with The Elovich or pseudo-first-order or intra-particle diffusion kinetic adsorption models.
کلیدواژه ها:
نویسندگان
M. Rajabi
Department of Chemistry, Shahre-Rey Branch, Islamic Azad University, Shahre-Rey, Tehran, Iran.
O. Moradi
Department of Chemistry, Shahre-Qods Branch, Islamic Azad University, Shahre- Qods, Tehran, Iran.
A. Mazlomifar
Department of Chemistry, Shahre-Rey Branch, Islamic Azad University, Shahre-Rey, Tehran, Iran.