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| Content Provider | Springer Nature Link |
|---|---|
| Author | Zare, Ehsan Nazarzadeh Hasanzadeh, Fereshteh Lakouraj, Moslem Mansour |
| Copyright Year | 2014 |
| Abstract | Nowadays, development of materials based on biopolymers in sorption process for removal of heavy metal ions from wastewater has been considered by many researchers. In this research, the nanogel of chitosan-g-thiacalix[4]arene (CS-g-TC4A) was synthesized from chitosan-azide and monopropargyl thiacalix[4]arene via click reaction. Firstly, Fe$_{3}$O$_{4}$-contained chitosan was synthesized via co-precipitation of Fe(II) and Fe(III) salts in the presence of chitosan. Then, magnetic chitosan grafted thiacalix[4]arene (Fe$_{3}$O$_{4}$-contained CS-g-TC4A) super-paramagnetic nanocomposites were prepared via click reaction of freshly prepared magnetic chitosan-azide with monopropargyl thiacalix[4]arene. The structure and surface morphology, thermal and magnetic properties of the nanogel and nanocomposite were characterized by Fourier transform infrared (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), thermal gravimetric analysis (TGA), atomic force microscopy (AFM) and vibrating sample magnetometer (VSM), respectively. The trend of heavy metal sorption in the CS-g-TC4A nanogel and Fe$_{3}$O$_{4}$-containing CS-g-TC4A super-paramagnetic nanocomposites is in the order of Pb(II) > Cd(II) > Co(II) > Ni(II) > Cu(II) > Cr(III) and Pb(II) > Cd(II) > Cu(II) > Ni(II) > Co(II) > Cr(III), respectively, in aqueous solutions at pH 7. The experimental data for all the cations were analyzed by isotherms and kinetics equations. The results of adsorption isotherm of cations on CS-g-TC4A nanogel and Fe$_{3}$O$_{4}$-contained CS-g-TC4A super-paramagnetic nanocomposite were fitted well with the Freundlich and Langmuir models, respectively. The maximal adsorption capacities of Pb(II), Cd(II), Co(II), Ni(II), Cu(II), Cr(III) by CS-g-TC4A nanogel and Fe$_{3}$O$_{4}$-contained CS-g-TC4A super-paramagnetic nanocomposite, as calculated from the Langmuir model, were 23.25, 16.20, 14.08, 13.88, 12.37, 11.11; and 23.28, 20.08, 15.89, 16.12,17.85, 14.92 mg/g, respectively. The kinetic study was in best agreement with pseudo-first-order model for both adsorbents. |
| Starting Page | 933 |
| Ending Page | 945 |
| Page Count | 13 |
| File Format | |
| ISSN | 10261265 |
| Journal | Iranian Polymer Journal |
| Volume Number | 23 |
| Issue Number | 12 |
| e-ISSN | 17355265 |
| Language | English |
| Publisher | Springer Berlin Heidelberg |
| Publisher Date | 2014-11-15 |
| Publisher Place | Berlin, Heidelberg |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Polymer Sciences Super-paramagnetic nanocomposite Nanogel Thiacalix[4]arene Ceramics, Glass, Composites, Natural Methods Chitosan Heavy metal ions removal |
| Content Type | Text |
| Resource Type | Article |
| Subject | Materials Chemistry Chemical Engineering Polymers and Plastics |
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