Removal of Cephalexin From Aqueous Solutions Using Magnesium Oxide/Granular Activated Carbon Hybrid Photocatalytic Process
محل انتشار: مهندسی بهداشت محیط، دوره: 6، شماره: 1
سال انتشار: 1398
نوع سند: مقاله ژورنالی
زبان: انگلیسی
مشاهده: 89
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شناسه ملی سند علمی:
JR_AJEHE-6-1_004
تاریخ نمایه سازی: 30 مرداد 1401
چکیده مقاله:
In the present study, magnesium oxide/granular activated carbon (MgO/GAC) composite as a catalyst was synthesized using the sol-gel method and its catalytic potential was investigated in the presence of ultraviolet (UV) irradiation for the removal of cephalexin (CLX) in a batch mode reactor. Then, the characterization of the MgO/GAC composite was determined by X-ray diffraction (XRD) and scanning electron microscopy (SEM). Next, the effect of operational parameters was evaluated, including the pH of the solution (۳-۱۱), the dosage of composite (۱-۶ g/L), initial CLX concentration (۲۰-۱۰۰ mg/L), and contact time (۱۰-۶۰ minutes). The maximum CLX degradation with an initial concentration of ۲۰ mg/L was as high as ۹۸% at pH=۳, ۴ g/L of MgO/GAC composite with UV irradiation within ۶۰-minute contact time. In addition, the removal process of CLX could be described by the pseudo-first-order kinetic. Further, the chemical oxygen demand (COD) and total organic carbon (TOC) removal rate were ۷۸% and, ۶۲.۳% in optimum conditions, respectively. The results indicated that the UV/MgO/GAC hybrid photocatalytic process can be considered as an efficient alternative for treating the wastewater containing CLX.
کلیدواژه ها:
نویسندگان
Abdolmotaleb Seid-Mohammadi
Social Determinants of Health Research Center, Department of Environmental Health Engineering, Hamadan University of Medical Sciences, Hamadan, Iran
Mina Bahrami
Department of Environmental Health Engineering, Hamadan University of Medical Sciences, Hamadan, Iran
Sanaz Omari
Department of Environmental Health Engineering, Hamadan University of Medical Sciences, Hamadan, Iran
Fateme Asadi
Student Research Committee, Department of Environmental Health Engineering, Hamadan University of Medical Sciences, Hamadan, Iran