Theoretical Investigation of the Adsorption of Cadmium Iodide from Water Using Polyaniline Polymer Filled with TiO<sub>2</sub> and ZnO Nanoparticles
The removal of heavy metals from drinking water has attracted great interest in water purification technology. In this study, a biocompatible Polyaniline (PANI) polymer filled with TiO<sub>2</sub> and ZnO nanoparticles (NPs) is considered as an adsorbent of cadmium iodide from water. The...
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MDPI AG
2021-09-01
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| Series: | Water |
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| Online Access: | https://www.mdpi.com/2073-4441/13/18/2591 |
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| author | Noureddine Mahdhi Norah Salem Alsaiari Fatimah Mohammed Alzahrani Khadijah Mohammedsaleh Katubi Abdelfattah Amari Saber Hammami |
| author_facet | Noureddine Mahdhi Norah Salem Alsaiari Fatimah Mohammed Alzahrani Khadijah Mohammedsaleh Katubi Abdelfattah Amari Saber Hammami |
| author_sort | Noureddine Mahdhi |
| collection | DOAJ |
| description | The removal of heavy metals from drinking water has attracted great interest in water purification technology. In this study, a biocompatible Polyaniline (PANI) polymer filled with TiO<sub>2</sub> and ZnO nanoparticles (NPs) is considered as an adsorbent of cadmium iodide from water. Theoretical investigation of the van der Waals (vdW) interactions deduced from the Hamaker constant calculated on the basis of Lifshitz theory was presented. It was found that the surface energy as well as the work of adhesion between water and PANI/NPs across air increases with an increasing volume fraction of the TiO<sub>2</sub> and ZnO nanoparticles. Consequently, an increase in the Laplace pressure around the cavities/porosities was found, which leads to the enhancement of the specific contact surface between water and PANI/NPs. On the other hand, for the interactions between CdI<sub>2</sub> particles and PANI/NPs surface across water, we show that the interactions are governed principally by the attractive London dispersion forces. The vdW energy and force increase proportionally with the augmentation of the volume fraction of nanoparticles and of the radius of the CdI<sub>2</sub> particle. Particularly, the PANI/TiO<sub>2</sub> has been proved to be a better candidate for adsorption of cadmium iodide from water than PANI/ZnO. |
| first_indexed | 2024-03-10T07:07:42Z |
| format | Article |
| id | doaj.art-6dfee125b1f24a38bb8fe63de1c3d984 |
| institution | Directory Open Access Journal |
| issn | 2073-4441 |
| language | English |
| last_indexed | 2024-03-10T07:07:42Z |
| publishDate | 2021-09-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Water |
| spelling | doaj.art-6dfee125b1f24a38bb8fe63de1c3d9842023-11-22T15:41:43ZengMDPI AGWater2073-44412021-09-011318259110.3390/w13182591Theoretical Investigation of the Adsorption of Cadmium Iodide from Water Using Polyaniline Polymer Filled with TiO<sub>2</sub> and ZnO NanoparticlesNoureddine Mahdhi0Norah Salem Alsaiari1Fatimah Mohammed Alzahrani2Khadijah Mohammedsaleh Katubi3Abdelfattah Amari4Saber Hammami5Laboratory Materials Organizations and Properties, Tunis El Manar University, Tunis 2092, TunisiaChemistry Department, College of Science, Princess Nourah Bint Abdulrahman University, Riyadh 11671, Saudi ArabiaChemistry Department, College of Science, Princess Nourah Bint Abdulrahman University, Riyadh 11671, Saudi ArabiaChemistry Department, College of Science, Princess Nourah Bint Abdulrahman University, Riyadh 11671, Saudi ArabiaDepartment of Chemical Engineering, College of Engineering, King Khalid University, Abha 61411, Saudi ArabiaFEMTO-ST Institute, CNRS UMR-6174, Université de Bourgogne Franche-Comté, 25030 Besançon, FranceThe removal of heavy metals from drinking water has attracted great interest in water purification technology. In this study, a biocompatible Polyaniline (PANI) polymer filled with TiO<sub>2</sub> and ZnO nanoparticles (NPs) is considered as an adsorbent of cadmium iodide from water. Theoretical investigation of the van der Waals (vdW) interactions deduced from the Hamaker constant calculated on the basis of Lifshitz theory was presented. It was found that the surface energy as well as the work of adhesion between water and PANI/NPs across air increases with an increasing volume fraction of the TiO<sub>2</sub> and ZnO nanoparticles. Consequently, an increase in the Laplace pressure around the cavities/porosities was found, which leads to the enhancement of the specific contact surface between water and PANI/NPs. On the other hand, for the interactions between CdI<sub>2</sub> particles and PANI/NPs surface across water, we show that the interactions are governed principally by the attractive London dispersion forces. The vdW energy and force increase proportionally with the augmentation of the volume fraction of nanoparticles and of the radius of the CdI<sub>2</sub> particle. Particularly, the PANI/TiO<sub>2</sub> has been proved to be a better candidate for adsorption of cadmium iodide from water than PANI/ZnO.https://www.mdpi.com/2073-4441/13/18/2591adsorptionpolyanilinecadmium iodide |
| spellingShingle | Noureddine Mahdhi Norah Salem Alsaiari Fatimah Mohammed Alzahrani Khadijah Mohammedsaleh Katubi Abdelfattah Amari Saber Hammami Theoretical Investigation of the Adsorption of Cadmium Iodide from Water Using Polyaniline Polymer Filled with TiO<sub>2</sub> and ZnO Nanoparticles Water adsorption polyaniline cadmium iodide |
| title | Theoretical Investigation of the Adsorption of Cadmium Iodide from Water Using Polyaniline Polymer Filled with TiO<sub>2</sub> and ZnO Nanoparticles |
| title_full | Theoretical Investigation of the Adsorption of Cadmium Iodide from Water Using Polyaniline Polymer Filled with TiO<sub>2</sub> and ZnO Nanoparticles |
| title_fullStr | Theoretical Investigation of the Adsorption of Cadmium Iodide from Water Using Polyaniline Polymer Filled with TiO<sub>2</sub> and ZnO Nanoparticles |
| title_full_unstemmed | Theoretical Investigation of the Adsorption of Cadmium Iodide from Water Using Polyaniline Polymer Filled with TiO<sub>2</sub> and ZnO Nanoparticles |
| title_short | Theoretical Investigation of the Adsorption of Cadmium Iodide from Water Using Polyaniline Polymer Filled with TiO<sub>2</sub> and ZnO Nanoparticles |
| title_sort | theoretical investigation of the adsorption of cadmium iodide from water using polyaniline polymer filled with tio sub 2 sub and zno nanoparticles |
| topic | adsorption polyaniline cadmium iodide |
| url | https://www.mdpi.com/2073-4441/13/18/2591 |
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