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Radiation synthesis of Fe 3 O 4 /SiO 2 /glycidyl methacrylate/acrylonitrile nanocomposite for adsorption of basic violet 7 dye: Kinetic, isotherm, and thermodynamic study
Author(s) -
Gad Yasser H.,
Elbarbary Ahmed M.
Publication year - 2021
Publication title -
applied organometallic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 71
eISSN - 1099-0739
pISSN - 0268-2605
DOI - 10.1002/aoc.6258
Subject(s) - glycidyl methacrylate , acrylonitrile , adsorption , nanocomposite , chemistry , fourier transform infrared spectroscopy , langmuir adsorption model , aqueous solution , nuclear chemistry , scanning electron microscope , chemical engineering , polymer chemistry , copolymer , materials science , organic chemistry , polymer , composite material , engineering
New functional nanocomposites (Fe 3 O 4 /SiO 2 /GMA/AN) were synthesized by γ‐irradiation copolymerization of glycidyl methacrylate (GMA) and acrylonitrile (AN) of different ratios onto the surface of Fe 3 O 4 /SiO 2 nanoparticles. The chemical structure and morphology of the nanocomposites were characterized by Fourier transform infrared (FTIR), X‐ray diffraction (XRD), transmission electron microscopy (TEM), and scanning electron microscopy (SEM). The influences of GMA/AN composition ratios (75/25, 50/50, and 25/75 v/v) of nanocomposites on the adsorption of basic violet 7 dye from aqueous solutions was investigated. The Fe 3 O 4 /SiO 2 /GMA/AN nanocomposite with GMA/AN compositions ratio of (25/75 v/v) provides maximum adsorption capacity, and thus it was selected as the suitable ratio for modification by amidoximation reaction. The influences of contact time, pH, temperature, initial concentration, and adsorbent dosage on the adsorption of dye onto Fe 3 O 4 /SiO 2 /GMA/AN‐amidoxime were evaluated. The adsorption capacity of poly (GMA/AN), Fe 3 O 4 /SiO 2 /GMA/AN, and Fe 3 O 4 /SiO 2 /GMA/AN‐amidoxime was 18.7, 114.1, and 181.3 mg/g, respectively. The optimum removal efficiency (90.65%) of dye by Fe 3 O 4 /SiO 2 /GMA/AN‐amidoxime was obtained after 120 min contact time, 200 mg/L dye concentration, and pH 7. The adsorption of dye onto the Fe 3 O 4 /SiO 2 /GMA/AN‐amidoxime follows pseudo‐second‐order adsorption kinetics and fits Langmuir adsorption isotherm, and the adsorption process is endothermic and spontaneous. The prepared Fe 3 O 4 /SiO 2 /GMA/AN‐amidoxime confirmed their possible use as a successful adsorbent for the adsorption of basic violet 7 from wastewater.