Bi Doping Starch-DMAEMA Hydrogel for Efficient Removal of Sr(II) | ||||
| Egyptian Journal of Chemistry | ||||
| Volume 66, Issue 11, November 2023, Page 189-197 PDF (742.82 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejchem.2023.239269.8677 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
Esraa Ahmed Alshafei  1; Mohamed Abdel Geleel2; Ghada Adel Mahmoud 3; Nagwa Abd El-fattah Badawy4; Samia Abo Farha4
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| 1Chemistry specialist in Nuclear fuel cycle dept, Nuclear and Radiological Safety Research center, Egyptian Atomic Energy Authority (EAEA). | ||||
| 2professor of radiation chemistry, Nuclear fuel cycle department, Nuclear and radiation safety research center, Egyptian Atomic Energy Authority | ||||
| 3Professor of Polymer Chemistry, Nuclear fuel cycle department, Nuclear and radiation safety research center, Egyptian Atomic Energy Authority (EAEA)National Center for Radiation Research and Technology, Atomic Energy Authority. | ||||
| 4Professor of physical chemistry, chemistry department, science faculty (girls), Al Azhar university | ||||
| Abstract | ||||
| One of the most significant environmental issues currently facing humanity is heavy metal contamination. The purpose of this study is the removal of Strontium ions Sr(II) by using gamma radiation to create starch/poly[2-(dimethylamino) ethyl methacrylate]/bismuth (St/DMAEMA/Bi) hydrogel nanocomposite. On the removal of Sr(II) ions, the effects of pH, contact time, adsorbent dose, and temperature were examined. The experimental data were fitted by Freundlich and Langmuir isotherm models. The results proved that the Langmuir isothermal model describes the absorption process well. To describe the adsorption kinetics of Sr(II) ions in compounds, the pseudo-second-order kinetic model is suitable. The thermodynamic results (ΔG°, ΔS°, and ΔH°) and isotherm investigations support the endothermic nature of the adsorption of Sr(II) ions on St/DMAEMA/Bi hydrogel nanocomposite. Positive ∆H° values demonstrated the endothermic nature of the adsorption, while positive ∆S° values verified the increased randomness during the process, and the negative values of ΔG° show that the obtained experimental data best fits. | ||||
| Keywords | ||||
| Nanocomposite; Gamma radiation; Heavy metal ions; Adsorption; Pseudo-second order; Langmuir isotherm | ||||
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