Synthesis of a New Chelating Iminophosphorane Derivative (Phosphazene) for U(VI) Recovery
A new synthetic chelating N–hydroxy–N–trioctyl iminophosphorane (HTIP) was prepared through the reaction of trioctylphosphine oxide (TOPO) with N–hydroxylamine hydrochloride in the presence of a Lewis acid (AlCl<sub>3</sub>). Specifications for the HTIP chelating ligand were successfully...
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| Format: | Article |
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MDPI AG
2022-04-01
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| Series: | Polymers |
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| Online Access: | https://www.mdpi.com/2073-4360/14/9/1687 |
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| author | Bahig M. Atia Ahmed K. Sakr Mohamed A. Gado Hassan S. El-Gendy Nagwa M. Abdelazeem Enass M. El-Sheikh Mohamed Y. Hanfi M. I. Sayyed Jamelah S. Al-Otaibi Mohamed F. Cheira |
| author_facet | Bahig M. Atia Ahmed K. Sakr Mohamed A. Gado Hassan S. El-Gendy Nagwa M. Abdelazeem Enass M. El-Sheikh Mohamed Y. Hanfi M. I. Sayyed Jamelah S. Al-Otaibi Mohamed F. Cheira |
| author_sort | Bahig M. Atia |
| collection | DOAJ |
| description | A new synthetic chelating N–hydroxy–N–trioctyl iminophosphorane (HTIP) was prepared through the reaction of trioctylphosphine oxide (TOPO) with N–hydroxylamine hydrochloride in the presence of a Lewis acid (AlCl<sub>3</sub>). Specifications for the HTIP chelating ligand were successfully determined using many analytical techniques, <sup>13</sup>C–NMR, <sup>1</sup>H–NMR, FTIR, EDX, and GC–MS analyses, which assured a reasonable synthesis of the HTIP ligand. The ability of HTIP to retain U(VI) ions was investigated. The optimum experimental factors, pH value, experimental time, initial U(VI) ion concentration, HTIP dosage, ambient temperature, and eluents, were attained with solvent extraction techniques. The utmost retention capacity of HTIP/CHCl<sub>3</sub> was 247.5 mg/g; it was achieved at pH = 3.0, 25 °C, with 30 min of shaking and 0.99 × 10<sup>−3</sup> mol/L. From the stoichiometric calculations, approximately 1.5 hydrogen atoms are released during the extraction at pH 3.0, and 4.0 moles of HTIP ligand were responsible for chelation of one mole of uranyl ions. According to kinetic studies, the pseudo–first order model accurately predicted the kinetics of U(VI) extraction by HTIP ligand with a retention power of 245.47 mg/g. The thermodynamic parameters Δ<i>S</i>°, Δ<i>H</i>°, and Δ<i>G</i>° were also calculated; the extraction process was predicted as an exothermic, spontaneous, and advantageous extraction at low temperatures. As the temperature increased, the value of ∆<i>G</i>° increased. The elution of uranium ions from the loaded HTIP/CHCl<sub>3</sub> was achieved using 2.0 mol of H<sub>2</sub>SO<sub>4</sub> with a 99.0% efficiency rate. Finally, the extended variables were used to obtain a uranium concentrate (Na<sub>2</sub>U<sub>2</sub>O<sub>7</sub>, Y.C) with a uranium grade of 69.93% and purity of 93.24%. |
| first_indexed | 2024-03-10T03:47:31Z |
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| institution | Directory Open Access Journal |
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| last_indexed | 2024-03-10T03:47:31Z |
| publishDate | 2022-04-01 |
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| spelling | doaj.art-129c13c93be841b8a5e5f3cadaed7bdd2023-11-23T09:04:48ZengMDPI AGPolymers2073-43602022-04-01149168710.3390/polym14091687Synthesis of a New Chelating Iminophosphorane Derivative (Phosphazene) for U(VI) RecoveryBahig M. Atia0Ahmed K. Sakr1Mohamed A. Gado2Hassan S. El-Gendy3Nagwa M. Abdelazeem4Enass M. El-Sheikh5Mohamed Y. Hanfi6M. I. Sayyed7Jamelah S. Al-Otaibi8Mohamed F. Cheira9Nuclear Materials Authority, P.O. Box 530, El Maadi, Cairo, EgyptNuclear Materials Authority, P.O. Box 530, El Maadi, Cairo, EgyptNuclear Materials Authority, P.O. Box 530, El Maadi, Cairo, EgyptNuclear Materials Authority, P.O. Box 530, El Maadi, Cairo, EgyptNational Research Center (NRC), 33 El-Buhoth Street, Dokki, Cairo 12622, EgyptNuclear Materials Authority, P.O. Box 530, El Maadi, Cairo, EgyptNuclear Materials Authority, P.O. Box 530, El Maadi, Cairo, EgyptDepartment of Physics, Faculty of Science, Isra University, Amman 11622, JordanDepartment of Chemistry, College of Science, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi ArabiaNuclear Materials Authority, P.O. Box 530, El Maadi, Cairo, EgyptA new synthetic chelating N–hydroxy–N–trioctyl iminophosphorane (HTIP) was prepared through the reaction of trioctylphosphine oxide (TOPO) with N–hydroxylamine hydrochloride in the presence of a Lewis acid (AlCl<sub>3</sub>). Specifications for the HTIP chelating ligand were successfully determined using many analytical techniques, <sup>13</sup>C–NMR, <sup>1</sup>H–NMR, FTIR, EDX, and GC–MS analyses, which assured a reasonable synthesis of the HTIP ligand. The ability of HTIP to retain U(VI) ions was investigated. The optimum experimental factors, pH value, experimental time, initial U(VI) ion concentration, HTIP dosage, ambient temperature, and eluents, were attained with solvent extraction techniques. The utmost retention capacity of HTIP/CHCl<sub>3</sub> was 247.5 mg/g; it was achieved at pH = 3.0, 25 °C, with 30 min of shaking and 0.99 × 10<sup>−3</sup> mol/L. From the stoichiometric calculations, approximately 1.5 hydrogen atoms are released during the extraction at pH 3.0, and 4.0 moles of HTIP ligand were responsible for chelation of one mole of uranyl ions. According to kinetic studies, the pseudo–first order model accurately predicted the kinetics of U(VI) extraction by HTIP ligand with a retention power of 245.47 mg/g. The thermodynamic parameters Δ<i>S</i>°, Δ<i>H</i>°, and Δ<i>G</i>° were also calculated; the extraction process was predicted as an exothermic, spontaneous, and advantageous extraction at low temperatures. As the temperature increased, the value of ∆<i>G</i>° increased. The elution of uranium ions from the loaded HTIP/CHCl<sub>3</sub> was achieved using 2.0 mol of H<sub>2</sub>SO<sub>4</sub> with a 99.0% efficiency rate. Finally, the extended variables were used to obtain a uranium concentrate (Na<sub>2</sub>U<sub>2</sub>O<sub>7</sub>, Y.C) with a uranium grade of 69.93% and purity of 93.24%.https://www.mdpi.com/2073-4360/14/9/1687UraniumN–Hydroxy–N–trioctyl–iminophosphorane (HTIP)solvent extractionG. Gattar graniteleach liquor |
| spellingShingle | Bahig M. Atia Ahmed K. Sakr Mohamed A. Gado Hassan S. El-Gendy Nagwa M. Abdelazeem Enass M. El-Sheikh Mohamed Y. Hanfi M. I. Sayyed Jamelah S. Al-Otaibi Mohamed F. Cheira Synthesis of a New Chelating Iminophosphorane Derivative (Phosphazene) for U(VI) Recovery Polymers Uranium N–Hydroxy–N–trioctyl–iminophosphorane (HTIP) solvent extraction G. Gattar granite leach liquor |
| title | Synthesis of a New Chelating Iminophosphorane Derivative (Phosphazene) for U(VI) Recovery |
| title_full | Synthesis of a New Chelating Iminophosphorane Derivative (Phosphazene) for U(VI) Recovery |
| title_fullStr | Synthesis of a New Chelating Iminophosphorane Derivative (Phosphazene) for U(VI) Recovery |
| title_full_unstemmed | Synthesis of a New Chelating Iminophosphorane Derivative (Phosphazene) for U(VI) Recovery |
| title_short | Synthesis of a New Chelating Iminophosphorane Derivative (Phosphazene) for U(VI) Recovery |
| title_sort | synthesis of a new chelating iminophosphorane derivative phosphazene for u vi recovery |
| topic | Uranium N–Hydroxy–N–trioctyl–iminophosphorane (HTIP) solvent extraction G. Gattar granite leach liquor |
| url | https://www.mdpi.com/2073-4360/14/9/1687 |
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