Equilibrium, kinetic, and thermodynamic applications for methylene blue removal using Buxus sempervirens leaf powder as a powerful low-cost adsorbent
- سال انتشار: 1398
- محل انتشار: فصلنامه علوم و فناوری ذرات، دوره: 5، شماره: 4
- کد COI اختصاصی: JR_JPST-5-4_004
- زبان مقاله: انگلیسی
- تعداد مشاهده: 237
نویسندگان
Research Lab for Advanced Separation Processes, Faculty of Chemical, Petroleum and Gas Engineering, Iran University of Science and Technology (IUST), Tehran, Iran
Research Lab for Advanced Separation Processes, Faculty of Chemical, Petroleum and Gas Engineering, Iran University of Science and Technology (IUST), Tehran, Iran
Research Lab for Advanced Separation Processes, Faculty of Chemical, Petroleum and Gas Engineering, Iran University of Science and Technology (IUST), Tehran, Iran
چکیده
In this work, methylene blue adsorption using the unconventional, natural, and low-cost adsorbent, Buxus sempervirens (Boxwood) leaf powder (BLP), was studied. Several experiments were conducted for the investigation of different process variables. Also different techniques such as XRF, XRD, SEM, FT-IR and N۲ adsorption-desorption analysis were applied for the characterization of BLP. Adsorption kinetic models showed that the pseudo-second-order by R۲ = ۰.۹۹۹ was well adapted. Two isotherms models, Langmuir and Freundlich, were selected to check of the amount of color removal. Methylene blue (MB) maximum adsorption capacities can attain ۳۸۴.۶۱ mg.g-۱ from the Langmuir isotherm. The values of ∆G۰ for adsorption of MB onto BLP ranges from -۱۹.۴۴ to -۲۴.۰۷ kJ.mol-۱, demonstrating that the adsorption process was spontaneous and irreversible. The removal of dye was considerably increased by increasing the temperature, which suggested that the adsorption process was endothermic. All results indicate that BLP can be feasibly employed for the elimination of MB from an aqueous solution.کلیدواژه ها
Dye, Boxwood, biosorbent, Water treatmentاطلاعات بیشتر در مورد COI
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