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Clay/MgFe 2 O 4 as a Novel Composite for Removal of Cr (VI) From Aqueous Media
Author(s) -
Esmaeili Hossein,
Hashemi Seyyed Ali Akbar
Publication year - 2020
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.202002383
Subject(s) - sorption , composite number , fourier transform infrared spectroscopy , langmuir adsorption model , adsorption , aqueous solution , mesoporous material , materials science , scanning electron microscope , langmuir , endothermic process , specific surface area , nuclear chemistry , chemical engineering , bet theory , chemistry , composite material , organic chemistry , engineering , catalysis
Abstract In this research, clay was modified by MgFe 2 O 4 nanoparticles and was then used to remove Cr (VI) from aqueous media. The properties of the composite were characterized by several analyses such as Scanning electron microscope (SEM), X‐ray diffraction (XRD), Fourier‐transform infrared spectroscopy (FTIR), Brunauer–Emmett–Teller (BET), and Energy dispersive X‐ray (EDX). According to the BET analysis, specific surface area and mean pores size for the clay/MgFe 2 O 4 composite were obtained 71.23 m 2 /g and 96.14 °A, respectively, which illustrates that the aforementioned composite had a mesoporous structure. Also, the XRD analysis indicated that the clay/MgFe 2 O 4 composite had a highly crystalline structure. Moreover, the sorption results indicated that the highest removal efficiency of Cr (VI) ion was obtained 96.05% after 15 min and pH value of 4.5. Furthermore, the maximum sorption capacity by the Langmuir model was determined 217.39 mg/g, which was a significant sorption capacity. Moreover, the reusability of the composite was studied after 8 cycles and the results showed that the composite could remove Cr (VI) with a removal efficiency of 94.55% after 4 times reusing the composite, which indicated a significant property of the adsorbent. Furthermore, the Langmuir isotherm was better fitted with the experimental data. Besides, the thermodynamic study indicated that the sorption of Cr (VI) using the clay/MgFe 2 O 4 was feasible, spontaneous and endothermic.