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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Article
Author(s)
N.A. Maziad1, M. Mohsen2, E. Gomaa2* and R. Mohammed2
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DOI:10.17265/2161-6213/2015.11-12.001
Affiliation(s)
1. Polymer Chemistry Department - National Center for Radiation Research and Technology, Atomic Energy Authority, Naser City, Cairo, Egypt
2. Physics Department, Faculty of Science, Ain Shams University, Abbassia,11566, Cairo, Egypt
ABSTRACT
Poly (acrylic, polyvinyl alcohol) copolymer hydrogel having varied PVA (Polyvinyl alcohol) content is prepared by gamma induced radiation polymerization. This hydrogel is used in water purification. The gel fraction and the swelling property are found to be 82% and 273% respectively at absorbed dose 20 kGy. The kinetic swelling and effect of solution pH on the swelling percent are also studied. The functional and bond structure is characterized by FT-IR (Fourier transform infrared spectroscopy). The hydrogel has been applied for the separation of Cu(II), Co(II) and Ni(II) ions from a test water solution. The factors affecting the metal uptake such as pH, time, and initial feed metal concentration are studied. It is found that, at pH 5 and after 24 h the maximum adsorption amount are 193 mg/g, 155 mg/g and 150 mg/g for Cu2+, Co2+ and Ni2+ respectively in case of PAAc. In case of P (PVA/AAc), there are increase in maximum capacity to be 197 mg/g, 194 mg/g and 160 mg/g towards Cu2+ , Co2+ and Ni2+ ions, respectively. The selectivity of hydrogels towards the different metal ions is studied by EDX (Energy dispersive X- ray) and follows the order Cu(II) > Co(II) > Ni(II). Microstructure of the prepared hydrogel before and after adsorption are investigated by means of SEM (Scanning electron microscope).
KEYWORDS
Hydrogels, irradiation, copolymerization, water decontamination, heavy metals.
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