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Materials 2017, 10(5), 540;

Hydrogels Synthesized by Electron Beam Irradiation for Heavy Metal Adsorption

National Institute for Laser, Plasma and Radiation Physics, Electron Accelerators Laboratory, #409 Atomistilor St., Magurele 077125, Romania
Horia Hulubei National Institute for Physics and Nuclear Engineering, 30 Reactorului St., Magurele 077125, Romania
Author to whom correspondence should be addressed.
Academic Editor: Biqiong Chen
Received: 11 April 2017 / Revised: 11 May 2017 / Accepted: 12 May 2017 / Published: 18 May 2017
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Poly(acrylamide co-acrylic acid) hydrogels were prepared by free-radical copolymerization of acrylamide and acrylic acid in aqueous solutions using electron beam irradiation in the dose range of 2.5 kGy to 6 kGy in atmospheric conditions and at room temperature. The influence of the absorbed dose, the amount of cross-linker (trimethylolpropane trimethacrylate) and initiator (potassium persulfate) on the swelling properties and the diffusion coefficient and network parameters of hydrogels were investigated. The structure and morphology of hydrogels were characterized by Fourier Transform Infrared Spectroscopy (FTIR) and Scanning Electron Microscopy (SEM). The use of the obtained hydrogels by the removal of Cu2+ and Cr6+ from aqueous solutions was investigated at room temperature. During the adsorption of metal ions on hydrogels, the residual metal ion concentration in the solution was measured by an atomic absorption spectrophotometer (AAS). It has been established that the use of a relatively small amount of trimethylolpropane trimethacrylate for hydrogel preparation has led to the increasing of swelling up to 8500%. View Full-Text
Keywords: hydrogels; electron beam irradiation; cross-linking; trimethylolpropane trimethacrylate hydrogels; electron beam irradiation; cross-linking; trimethylolpropane trimethacrylate

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Manaila, E.; Craciun, G.; Ighigeanu, D.; Cimpeanu, C.; Barna, C.; Fugaru, V. Hydrogels Synthesized by Electron Beam Irradiation for Heavy Metal Adsorption. Materials 2017, 10, 540.

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