Structural characterization and adsorptive ability of green synthesized Fe3O4 nanoparticles to remove Acid blue 113 dye

Pai, Shraddha and Kini, Srinivas M and Narasimhan, Manoj Kumar and Pugazhendhi, Arivalagan and Raja, Selvaraj (2021) Structural characterization and adsorptive ability of green synthesized Fe3O4 nanoparticles to remove Acid blue 113 dye. Surfaces and Interfaces. ISSN 2468-0230

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Abstract

In the current study, Thunbergia grandiflora (Bengal clock vine) leaf extract has been used as green-resource to prepare Fe3O4 nanoparticles. SEM image showed agglomerated spherical (25 nm) particles, and EDS ascertained the existence of elemental iron (between 6 – 7 k eV) and oxygen (at 0.5 keV). XRD and XPS designated signature peaks for Fe3O4. BET studies revealed a high specific surface area of 114.42 m2 /g with mesoporous structure. FTIR showed the distinct band for iron-oxide at 542 cm− 1 . A very low coercivity (1.5812 Oe) and retentivity (2.216 memu/g) indicated the paramagnetic properties of Fe3O4 nanoparticles. Batch adsorption of Acid blue 113 considering several factors conceded 95% removal within 3.5 h of contact time at pH 2 with the adsorbent dosage of 1 g/L, the concentration of 25 mg/L, 150 rpm, and the temperature of 303 K. The pseudo-second-order equation was best suited for the adsorption data indicating chemisorption. Freundlich isotherm model indicated a good fit for the equilibrium data. Thermodynamic parameters indicated exothermicity and spontaneity of the adsorption process. The maximum sorption capacity gained under an optimized environment was 138.89 mg/g. Hence, this study convincingly recognized the feasibility of the green synthesized Fe3O4 adsorbent for efficient Acid blue 113 dye removal with a suggestively greater sorption capacity

Item Type: Article
Uncontrolled Keywords: Acid blue 113 Thunbergia grandiflora Fe3O4NPs Adsorption Isotherms Kinetics
Subjects: Engineering > MIT Manipal > Chemical
Depositing User: MIT Library
Date Deposited: 29 Jun 2021 09:38
Last Modified: 29 Jun 2021 09:39
URI: http://eprints.manipal.edu/id/eprint/156850

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