New Approaches for Pb(II) Removal from Aqueous Media Using Nanopowder Sodium Titanosilicate: Kinetics Study and Thermodynamic Behavior
Microporous sodium titanosilicate, Na<sub>2</sub>TiSiO<sub>5</sub>, has been successfully prepared using the sol–gel method. The structural and morphological characterization of synthesized product has been made via thermal analyses (TG-DTG), X-ray diffraction (XRD), and elec...
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MDPI AG
2023-09-01
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| Series: | International Journal of Molecular Sciences |
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| author | Ionela Carazeanu Popovici Simona Dobrinaș Alina Soceanu Viorica Popescu Gabriel Prodan Ichinur Omer |
| author_facet | Ionela Carazeanu Popovici Simona Dobrinaș Alina Soceanu Viorica Popescu Gabriel Prodan Ichinur Omer |
| author_sort | Ionela Carazeanu Popovici |
| collection | DOAJ |
| description | Microporous sodium titanosilicate, Na<sub>2</sub>TiSiO<sub>5</sub>, has been successfully prepared using the sol–gel method. The structural and morphological characterization of synthesized product has been made via thermal analyses (TG-DTG), X-ray diffraction (XRD), and electron microscopy (SEM and TEM). Adsorption properties of the synthesized Na<sub>2</sub>TiSiO<sub>5</sub> nanopowder for Pb(II) removal of aqueous media was investigated in different experimental conditions such as the contact time, the initial metal concentration, the pH, and the temperature. The Pb(II) adsorption on Na<sub>2</sub>TiSiO<sub>5</sub> was discussed according to the kinetics and thermodynamics models. The adsorption kinetics of Pb(II) have been better described by the PS-order kinetic model which has the highest fitting correlation coefficients (R<sup>2</sup>: 0.996–0.999) out of all the other models. The adsorption results have been successfully fitted with the Langmuir and Redlich–Paterson models (R<sup>2</sup>: 0.9936–0.9996). The calculated thermodynamic parameters indicate that the Pb(II) adsorption is an endothermic process, with increased entropy, having a spontaneous reaction. The results have revealed a maximum adsorption capacity of 155.71 mg/g at 298 K and a very high adsorption rate at the beginning, more than 85% of the total amount of Pb(II) being removed within the first 120 min, depending on the initial concentration. |
| first_indexed | 2024-03-10T22:41:27Z |
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| issn | 1661-6596 1422-0067 |
| language | English |
| last_indexed | 2024-03-10T22:41:27Z |
| publishDate | 2023-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | International Journal of Molecular Sciences |
| spelling | doaj.art-a171e33c5150422fa48127e10164e37a2023-11-19T11:03:10ZengMDPI AGInternational Journal of Molecular Sciences1661-65961422-00672023-09-0124181378910.3390/ijms241813789New Approaches for Pb(II) Removal from Aqueous Media Using Nanopowder Sodium Titanosilicate: Kinetics Study and Thermodynamic BehaviorIonela Carazeanu Popovici0Simona Dobrinaș1Alina Soceanu2Viorica Popescu3Gabriel Prodan4Ichinur Omer5Chemistry and Chemical Engineering Department, Ovidius University of Constanta, 900527 Constanta, RomaniaChemistry and Chemical Engineering Department, Ovidius University of Constanta, 900527 Constanta, RomaniaChemistry and Chemical Engineering Department, Ovidius University of Constanta, 900527 Constanta, RomaniaChemistry and Chemical Engineering Department, Ovidius University of Constanta, 900527 Constanta, RomaniaElectron Microscopy Laboratory, Department of Physics, Ovidius University of Constanta, 900527 Constanta, RomaniaCivil Engineering Faculty, Ovidius University of Constanta, 900527 Constanta, RomaniaMicroporous sodium titanosilicate, Na<sub>2</sub>TiSiO<sub>5</sub>, has been successfully prepared using the sol–gel method. The structural and morphological characterization of synthesized product has been made via thermal analyses (TG-DTG), X-ray diffraction (XRD), and electron microscopy (SEM and TEM). Adsorption properties of the synthesized Na<sub>2</sub>TiSiO<sub>5</sub> nanopowder for Pb(II) removal of aqueous media was investigated in different experimental conditions such as the contact time, the initial metal concentration, the pH, and the temperature. The Pb(II) adsorption on Na<sub>2</sub>TiSiO<sub>5</sub> was discussed according to the kinetics and thermodynamics models. The adsorption kinetics of Pb(II) have been better described by the PS-order kinetic model which has the highest fitting correlation coefficients (R<sup>2</sup>: 0.996–0.999) out of all the other models. The adsorption results have been successfully fitted with the Langmuir and Redlich–Paterson models (R<sup>2</sup>: 0.9936–0.9996). The calculated thermodynamic parameters indicate that the Pb(II) adsorption is an endothermic process, with increased entropy, having a spontaneous reaction. The results have revealed a maximum adsorption capacity of 155.71 mg/g at 298 K and a very high adsorption rate at the beginning, more than 85% of the total amount of Pb(II) being removed within the first 120 min, depending on the initial concentration.https://www.mdpi.com/1422-0067/24/18/13789sodium titanosilicatelead removaladsorptionkinetics and isotherm models |
| spellingShingle | Ionela Carazeanu Popovici Simona Dobrinaș Alina Soceanu Viorica Popescu Gabriel Prodan Ichinur Omer New Approaches for Pb(II) Removal from Aqueous Media Using Nanopowder Sodium Titanosilicate: Kinetics Study and Thermodynamic Behavior International Journal of Molecular Sciences sodium titanosilicate lead removal adsorption kinetics and isotherm models |
| title | New Approaches for Pb(II) Removal from Aqueous Media Using Nanopowder Sodium Titanosilicate: Kinetics Study and Thermodynamic Behavior |
| title_full | New Approaches for Pb(II) Removal from Aqueous Media Using Nanopowder Sodium Titanosilicate: Kinetics Study and Thermodynamic Behavior |
| title_fullStr | New Approaches for Pb(II) Removal from Aqueous Media Using Nanopowder Sodium Titanosilicate: Kinetics Study and Thermodynamic Behavior |
| title_full_unstemmed | New Approaches for Pb(II) Removal from Aqueous Media Using Nanopowder Sodium Titanosilicate: Kinetics Study and Thermodynamic Behavior |
| title_short | New Approaches for Pb(II) Removal from Aqueous Media Using Nanopowder Sodium Titanosilicate: Kinetics Study and Thermodynamic Behavior |
| title_sort | new approaches for pb ii removal from aqueous media using nanopowder sodium titanosilicate kinetics study and thermodynamic behavior |
| topic | sodium titanosilicate lead removal adsorption kinetics and isotherm models |
| url | https://www.mdpi.com/1422-0067/24/18/13789 |
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