Removal of Dibenzothiophene Using Activated Carbon/γ-Fe۲O۳ Nano-Composite: Kinetic and Thermodynamic Investigation of the Removal Process
Publish Year: 1394
نوع سند: مقاله ژورنالی
زبان: English
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شناسه ملی سند علمی:
JR_ANALCH-2-2_001
تاریخ نمایه سازی: 2 مرداد 1402
Abstract:
In the present study, removal of dibenzothiophene (DBT) from model oil (n-hexane) was investigated using magnetic activated carbon (MAC) nano-composite adsorbent. The synthesized nano-composite was characterized by FT-IR, FE-SEM, BET and VSM techniques. The MAC nano-composite exhibited a nearly superparamagnetic property with a saturation magnetization (Ms) of ۲۹.۲ emu g-۱, which made it desirable for separation under an external magnetic field. The magnetic adsorbent afforded a maximum adsorption capacity of ۳۸.۰ mg DBT g-۱ at the optimized conditions (adsorbent dose, ۸ g l-۱; contact time, ۱ h; temperature, ۲۵ °C). Langmuir, Freundlich and Temkin isotherm models were used to fit equilibrium data for MAC nano-composite. Adsorption process could be well described by the Langmuir model. Kinetic studies were carried out and showed the sorption kinetics of DBT was best described by a pseudo-second-order kinetic model. In addition, the MAC nano-composite exhibited good capability of recycling to adsorb DBT in gasoline deep desulfurization.
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Authors
Maryam Fayazi
Shahid Bahonar University of Kerman
Mohammad Ali Taher
Research Institute of Environmental Sciences
Daryoush Afzali
Environment Department, Research Institute of Environmental Sciences, International Center for Science, High Technology & Environmental Sciences, Kerman, Iran
Ali Mostafavi
Department of Chemistry, Faculty of Sciences, Shahid Bahonar University, Kerman, Iran
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