Lead Adsorption onto Surface Modified Nano Titania: Kinetic and Thermodynamic Studies
The present work focused on the adsorption of Pb(II) from aqueous solutions by amino-functionalized nano titania in a batch system. Surface modification was based on immobilization of o-phosphoethanolamine on the surface. The effects of pH, adsorbent dose, contact time, initial metal concentration,...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR
2020-12-01
|
| Series: | Iranian Journal of Chemistry & Chemical Engineering |
| Subjects: | |
| Online Access: | http://www.ijcce.ac.ir/article_36577_c862e6a98572950ec72b59f9f331b105.pdf |
| _version_ | 1818877679258042368 |
|---|---|
| author | Zahra Shojaei Effat Iravani Seyed Mohammad Ali Moosavian Meisam Torab Mostaedi |
| author_facet | Zahra Shojaei Effat Iravani Seyed Mohammad Ali Moosavian Meisam Torab Mostaedi |
| author_sort | Zahra Shojaei |
| collection | DOAJ |
| description | The present work focused on the adsorption of Pb(II) from aqueous solutions by amino-functionalized nano titania in a batch system. Surface modification was based on immobilization of o-phosphoethanolamine on the surface. The effects of pH, adsorbent dose, contact time, initial metal concentration, and temperature on the adsorption process were examined. The maximum adsorption of Pb(II) was observed to occur at pH 6.0. Kinetic data showed that the adsorption process achieved equilibrium within 90 min and experimental data were fitted well by the pseudo-second-order model. According to the equilibrium data, Pb(II) adsorption was well described by the Langmuir isotherm model. According to the evaluated thermodynamic parameters at different temperatures, the adsorption was a spontaneous ( ) and endothermic ( ) process. The presence of Mg and Ca ions as interfering cations up to 150 mg/g caused no considerable lowering effect on the Pb(II) adsorption. In addition, the regeneration of the adsorbent was performed using HNO3 (0.1 mol/L). The obtained studies showed that amino-functionalized nano titania was successfully used as an efficient adsorbent for removal of the Pb(II) from aqueous solutions. |
| first_indexed | 2024-12-19T14:02:07Z |
| format | Article |
| id | doaj.art-c4b2c3450bc646ba8e734a9d14ff72bd |
| institution | Directory Open Access Journal |
| issn | 1021-9986 1021-9986 |
| language | English |
| last_indexed | 2024-12-19T14:02:07Z |
| publishDate | 2020-12-01 |
| publisher | Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR |
| record_format | Article |
| series | Iranian Journal of Chemistry & Chemical Engineering |
| spelling | doaj.art-c4b2c3450bc646ba8e734a9d14ff72bd2022-12-21T20:18:25ZengIranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECRIranian Journal of Chemistry & Chemical Engineering1021-99861021-99862020-12-0139610511910.30492/ijcce.2019.3657736577Lead Adsorption onto Surface Modified Nano Titania: Kinetic and Thermodynamic StudiesZahra Shojaei0Effat Iravani1Seyed Mohammad Ali Moosavian2Meisam Torab Mostaedi3School of Chemical Engineering, University of Tehran, P.O. Box 11365-4563 Tehran, I.R. IRANNuclear Science and Technology Research Center, P.O. Box 11365-8486 Tehran, I.R. IRANSchool of Chemical Engineering, University of Tehran, P.O. Box 11365-4563 Tehran, I.R. IRANNuclear Science and Technology Research Center, P.O. Box 11365-8486 Tehran, I.R. IRANThe present work focused on the adsorption of Pb(II) from aqueous solutions by amino-functionalized nano titania in a batch system. Surface modification was based on immobilization of o-phosphoethanolamine on the surface. The effects of pH, adsorbent dose, contact time, initial metal concentration, and temperature on the adsorption process were examined. The maximum adsorption of Pb(II) was observed to occur at pH 6.0. Kinetic data showed that the adsorption process achieved equilibrium within 90 min and experimental data were fitted well by the pseudo-second-order model. According to the equilibrium data, Pb(II) adsorption was well described by the Langmuir isotherm model. According to the evaluated thermodynamic parameters at different temperatures, the adsorption was a spontaneous ( ) and endothermic ( ) process. The presence of Mg and Ca ions as interfering cations up to 150 mg/g caused no considerable lowering effect on the Pb(II) adsorption. In addition, the regeneration of the adsorbent was performed using HNO3 (0.1 mol/L). The obtained studies showed that amino-functionalized nano titania was successfully used as an efficient adsorbent for removal of the Pb(II) from aqueous solutions.http://www.ijcce.ac.ir/article_36577_c862e6a98572950ec72b59f9f331b105.pdffunctionalizationnano titaniao-phosphoethanolaminpb(ii) |
| spellingShingle | Zahra Shojaei Effat Iravani Seyed Mohammad Ali Moosavian Meisam Torab Mostaedi Lead Adsorption onto Surface Modified Nano Titania: Kinetic and Thermodynamic Studies Iranian Journal of Chemistry & Chemical Engineering functionalization nano titania o-phosphoethanolamin pb(ii) |
| title | Lead Adsorption onto Surface Modified Nano Titania: Kinetic and Thermodynamic Studies |
| title_full | Lead Adsorption onto Surface Modified Nano Titania: Kinetic and Thermodynamic Studies |
| title_fullStr | Lead Adsorption onto Surface Modified Nano Titania: Kinetic and Thermodynamic Studies |
| title_full_unstemmed | Lead Adsorption onto Surface Modified Nano Titania: Kinetic and Thermodynamic Studies |
| title_short | Lead Adsorption onto Surface Modified Nano Titania: Kinetic and Thermodynamic Studies |
| title_sort | lead adsorption onto surface modified nano titania kinetic and thermodynamic studies |
| topic | functionalization nano titania o-phosphoethanolamin pb(ii) |
| url | http://www.ijcce.ac.ir/article_36577_c862e6a98572950ec72b59f9f331b105.pdf |
| work_keys_str_mv | AT zahrashojaei leadadsorptionontosurfacemodifiednanotitaniakineticandthermodynamicstudies AT effatiravani leadadsorptionontosurfacemodifiednanotitaniakineticandthermodynamicstudies AT seyedmohammadalimoosavian leadadsorptionontosurfacemodifiednanotitaniakineticandthermodynamicstudies AT meisamtorabmostaedi leadadsorptionontosurfacemodifiednanotitaniakineticandthermodynamicstudies |