الفهرس | Only 14 pages are availabe for public view |
Abstract Synthesis of ampholyte nanocomposite polymers as environmentally friendly adsorbents is highly demanded in the field of adsorption of radionuclides. In this work, the following ampholyte nanocomposite polymers were successfully synthesized using gamma radiation for initiating the grafting of monomers onto natural polymers in the presence of Fe2O3 as a magnetic nanoparticle (MNPs) by template polymerization technique., P (N,N-diallyldimethylammonium chloride-acrylamide) carboxymethyl cellulose sodium salt/ Iron(III) oxide P(N,N-diallyldimethylammonium chloride- sodium acrylate) carboxymethyl cellulose sodium salt/Iron(III) oxide P(vinyl imidazole-sodium acrylate)carboxymethyl cellulose sodium salt/Iron(III) oxide P (N,N-diallyldimethylammonium chloride-acrylamide) sodium alginate/ Iron(III) oxide P(N,N-diallyldimethylammonium chloride- sodium acrylate) sodium alginate /Iron(III) oxide P(vinyl imidazole- sodium acrylate) sodium alginate/Iron(III) oxide The influence of reaction conditions, such as concentration and composition of monomers, polymer, crosslinker (NMBA) and MNPs concentration, on the grafting efficiency and swelling degree were studied.The structural characteristic of ampholyte nanocomposite polymers was confirmed by means of FTIR, SEM, and TGA. The adsorption behaviors of ampholyte nanocomposite polymers toward 60Co and 99mTc radionuclides were examined using the batch adsorption experiments as a function of adsorbent weight, pH, adsorption time, temperature and initial metal ions concentration. Adsorption isotherms, kinetic studies, and thermodynamic studies were used to fit the experimental data. Keywords: polyampholyte; template polymerization, radiationinduced graft copolymerization; sodium acrylate; alginate; carboxymethyl cellulose; cobalt and technetium removal. |