A Green and Low-Cost Nanocomposite Using Corn Cob Fiber and ZnFe₂O₄ for Pesticide Adsorption from Water
- سال انتشار: 1403
- محل انتشار: فصلنامه گزارش های زیست فناوری کاربردی، دوره: 11، شماره: 4
- کد COI اختصاصی: JR_JABR-11-4_003
- زبان مقاله: انگلیسی
- تعداد مشاهده: 84
نویسندگان
Faculty of Pharmacy, Baqiyatallah University of Medical Sciences, Tehran, Iran
Faculty of Pharmacy, Baqiyatallah University of Medical Sciences, Tehran, Iran
Applied Biotechnology Research Center, Baqiyatallah University of Medical Sciences, Tehran, Iran
چکیده
Introduction: This study synthesized a nanocomposite using corn cob fiber and ZnFe₂O₄, characterized by electron microscopy, X-ray diffraction, infrared spectroscopy, and surface porosity analysis. The research focused on evaluating the adsorption capacity and kinetics of this nanocomposite for removing malathion and bendiocarb, representing organophosphate and carbamate pesticides, respectively.Materials and Methods: The nanocomposite was prepared and characterized using various techniques. Adsorption experiments assessed the removal efficiency of the pesticides under different conditions, including contact time, initial pollutant concentration, pH, and nanocomposite dosage. Kinetic studies utilized pseudo-first-order (PFO) and pseudo-second-order (PSO) models.Results: Rapid adsorption occurred within the first ۲۰ minutes, with removal efficiencies of ۴۵.۴% for malathion and ۴۰.۵% for bendiocarb. Final efficiencies reached ۴۹.۳% for malathion and ۴۷.۷% for bendiocarb at ۸۵ minutes. Optimal contact times were around ۳۰ minutes for malathion and ۴۰ minutes for bendiocarb. The PSO model provided a better fit, with higher equilibrium adsorption capacities (۱۱۶.۳ mg/g for malathion and ۱۲۹.۹ mg/g for bendiocarb). pH had a positive but minor effect on removal efficiency, and a dosage-dependent increase was observed, with a saturation point beyond ۱۰ mg of nanocomposite.Conclusions: The corn cob fiber and ZnFe₂O₄ nanocomposite effectively removed malathion and bendiocarb from aqueous solutions. Key factors influencing adsorption included contact time, pH, and nanocomposite dosage, highlighting the nanocomposite's potential for pesticide removal applications.کلیدواژه ها
Pesticides, Organophosphates, Carbamates, Nanocomposites, Adsorptionاطلاعات بیشتر در مورد COI
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