Hydrogels Synthesized by Electron Beam Irradiation for Heavy Metal Adsorption

Materials

Catalina Cimpeanu¹  Viorel Fugaru¹  Catalina Barna¹  Daniel Ighigeanu²  Gabriela Craciun²  Elena Manaila² 

[1] Horia Hulubei National Institute for Physics and Nuclear Engineering, 30 Reactorului St., Magurele 077125, Romania;National Institute for Laser, Plasma and Radiation Physics, Electron Accelerators Laboratory, 409 Atomistilor St., Magurele 077125, Romania;

关键词: hydrogels;    electron beam irradiation;    cross-linking;    trimethylolpropane trimethacrylate;   

DOI  :  10.3390/ma10050540

来源: DOAJ

【 摘 要 】

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%.

【 授权许可】

Unknown