Preparation and characterization of sulfonated polystyrene/magnetite nanocomposites for organic dye adsorption

Magnetite nanoparticles (MNPs) were prepared by co-precipitation method and were found to have average size of 5nm with spherical shape crystalline structure with super-magnetic properties. Commercial polystyrene (PS) was sulfonated through the reaction with freshly prepared acetyl sulfate. Three di...

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Bibliographic Details
Published in:Egyptian journal of petroleum 2018-09, Vol.27 (3), p.403-413
Main Authors: Al-Sabagh, A.M., Moustafa, Y.M., Hamdy, A., Killa, H.M., Ghanem, R.T.M., Morsi, R.E.
Format: Article
Language:English
Subjects:
CR dye removal
Magnetite nanocomposites
Magnetite nanoparticles
Polystyrene
Sulfonated polystyrene
Water decolorization
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Summary:Magnetite nanoparticles (MNPs) were prepared by co-precipitation method and were found to have average size of 5nm with spherical shape crystalline structure with super-magnetic properties. Commercial polystyrene (PS) was sulfonated through the reaction with freshly prepared acetyl sulfate. Three different degrees of sulfonation, based on the ratio of the acetyl sulfate to polystyrene, were prepared (1:1, 1:3 and 1:5). Nanocomposites of the prepared magnetite nanoparticles 1:3 sulfonated polystyrene were prepared at different magnetite content (1, 5 and 10%). The produced materials were characterized by dynamic light scattering (DLS), transmittance electron microscope (TEM) X-ray diffraction (XRD) and vibrating sample magnetometer (VSM). PS, MNPs and the prepared nanocomposites were investigated as adsorbents for Congo Red (CR). The variables influencing the adsorption capacity, such as solution pH, contact time and the initial dye concentration were systematically investigated. The adsorption for CR by the previous adsorbents show maximum experimental uptake capacity of 26.78, 33.15, 53.35, 64.73, and 76.29mg/g for PS, MNPs, SPS/MNPs 1%, SPS/MNPs 5% and SPS/MNPs 10%, respectively. The adsorption process was found to follow the pseudo second order kinetic model and fit quite well with Langmuir adsorption isotherm.
ISSN:1110-0621
DOI:10.1016/j.ejpe.2017.07.004