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Facile synthesis of FeFe2O4 magnetic nanomaterial for removing methylene blue from aqueous solution
Authors:Van-Phuc Dinh  Ngoc Quyen Tran  Nguyen-Que-Tran Le  Quang-Huy Tran  Trinh Duy Nguyen  Van Tan Le
Institution:3. Graduate University of Science and Technology, VAST, TL29, Thanh Loc Ward, Dist. 12, Ho Chi Minh City 700000, Vietnam
Abstract:A facile and simple chemical precipitation method was utilized to synthesize FeFe_2O_4 magnetic nanomaterial for removing methylene blue(MB) from aqueous solution. Characterizations of this material were examined by using XRD, SEM, FT-IR, TGA-DTG and BET methods. Factors affecting the uptake of methylene blue, including p H, adsorption time, and MB initial concentration were also studied. The measured data were fitted by using four isotherm models including Langmuir, Freundlich, Sips and Temkin. Results showed that the Sips model offers the best fit to the data. In addition, the monolayer MB adsorption capacity obtained from the Langmuir model was 42.35 mg g~(-1) under the optimal conditions of p H = 10 and adsorption time = 80 min. In particular, the uptake of MB onto FeFe_2O_4 magnetic nanomaterial obtained from the kinetic and mechanism studies of the adsorption was in good agreement with prediction of the pseudo-first-order model, whereas the electrostatic interaction was found to play a primary mechanism.
Keywords:Corresponding author    Adsorption  Methylene blue  Adsorption mechanism
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