Scallop shell coated Fe۲O۳ nanocomposite as an eco-friendly adsorbent for tetracycline removal

سال انتشار: 1400
محل انتشار: دهمین کنفرانس بین المللی نوآوری و تحقیق در علوم مهندسی
کد COI اختصاصی: ICIRES10_032
زبان مقاله: انگلیسی
تعداد مشاهده: 185

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نویسندگان

Dariush Naghipour

School of Health, Guilan University of Medical Sciences Rasht, Iran

Kamran Taghavi

School of Health, Guilan University of Medical Sciences Rasht, Iran

Fatemeh Javan Mahjoub Doust

School of Health, Guilan University of Medical Sciences Rasht, Iran

Jalil Jaafari

School of Health, Guilan University of Medical Sciences Rasht, Iran

چکیده

The present study focused on the usability of scallop shell coated Fe۲O۳ nanoparticles as an eco-friendly new absorbent in the treatment of tetracycline (TC). The process performance in terms of TC removal was investigated at different operating conditions i.e. at solution pH of ۷-۱۱, Fe۲O۳-scallop dosage of ۰.۴- ۲.۴ g L-۱, initial TC content of ۲۰-۱۲۰ mg L-۱, and temperature of ۲۵- ۵۵ ℃. Solution pH of ۷ yielded the highest TC removal efficiency (۹۹%). At this pH value, almost complete TC removal was achieved at a Fe۲O۳-scallop shell nanocomposite dose of ۱.۶ g L-۱, and ۲۵ C. The responsible TC removal mechanism suggested as the non-electrical - dispersion interaction between the bulk  system on the absorbent surface and TC molecules bearing both benzene rings and double bonds at this solution pH. TC removal efficiency appreciably enhanced up to the Fe۲O۳-scallop dosage of ۱.۶ g L-۱ being an optimum. Adsorption rate found to be fast at lower initial TC concentrations than ۴۰ mg L-۱. The effect of temperature on TC removal efficiency was insignificant. Adsorption followed the pseudo-second order kinetic model. Experimental data perfectly fitted by the Langmuir equation. The maximum adsorption capacity was calculated as ۴۹.۲۶ mg g-۱. Thermodynamic analysis demonstrated that adsorption process was a spontaneous process and endothermic. The results obtained from present study proved the excellent performance of scallop shell coated Fe۲O۳ nanoparticles as an eco-friendly adsorbent in TC treatment.

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