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Synthesis of 1-acryloyl-3-phenyl thiourea based pH sensitive hydrogels for removal of samarium and terbium

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Abstract

This paper describes the synthesis of a new chelating poly(acrylamide-co-dimethylaminoethyl methacrylate-co-1-acryloyl-3-phenyl thiourea) (PAPDM) hydrogel. The PAPDM hydrogels were prepared by the simple free radical polymerization of monomers acrylamide, dimethylamino ethyl methacrylate and 1-acryloyl-3-phenyl thiourea. The free radical initiator used for this study was ammonium persulphate and the cross-linker was ethylene glycol di methacrylate. The swelling study of the PAPDM hydrogels were performed in the aqueous environment to calculate the morphological parameters, such as the volume fraction in a swollen gel (v 2m ), polymer-solvent interaction parameter (χ) and molecular weight between the crosslinks (M c ). These hydrogels were characterized by Fourier transform infrared spectroscopy, differential scanning calorimetry and scanning electron microscopy. Further these chelating hydrogels were investigated for the removal of rare earth metal ions (samarium and terbium) from aqueous environments by varying the adsorption time, adsorbate concentration and monomer ratio. The adsorption time data for samarium and terbium were fitted to two simple kinetic models, pseudo-first and pseudo-second-order, and tested to examine the adsorption mechanisms. The kinetic parameters were calculated. The equilibrium data was fitted well to the Langmuir and Freundlich models.

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Authors and Affiliations

  1. Department of Chemistry, Yogi Vemana University, Kadapa, 516 003, India

    Nagella Siva Gangi Reddy & Kummari Subba Venkata Krishna Rao

  2. Department of Polymer Science and Engineering, Pusan National University, Busan, 46241, Korea

    Kummara Madhusudana Rao & Chang-Sik Ha

Authors
  1. Nagella Siva Gangi Reddy
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  2. Kummara Madhusudana Rao
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  3. Kummari Subba Venkata Krishna Rao
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  4. Chang-Sik Ha
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Correspondence to Kummari Subba Venkata Krishna Rao or Chang-Sik Ha.

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Reddy, N.S.G., Rao, K.M., Rao, K.S.V.K. et al. Synthesis of 1-acryloyl-3-phenyl thiourea based pH sensitive hydrogels for removal of samarium and terbium. Macromol. Res. 24, 494–501 (2016). https://doi.org/10.1007/s13233-016-4068-7

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  • DOI: https://doi.org/10.1007/s13233-016-4068-7

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