Surface Adsorption Mechanism between Lead(II,IV) and Nanomaghemite Studied on Polluted Water Samples Collected from the Peruvian Rivers Mantaro and Cumbaza
Real water remediation is an important issue that requires the development of novel adsorbents with remarkable adsorption properties, permitting reusability. In this work, the surface and adsorption properties of bare magnetic iron oxide nanoparticles were systematically studied, before and after th...
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| Format: | Article |
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MDPI AG
2023-05-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/13/10/1684 |
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| author | Juan A. Ramos-Guivar Noemi-Raquel Checca-Huaman F. Jochen Litterst Edson C. Passamani |
| author_facet | Juan A. Ramos-Guivar Noemi-Raquel Checca-Huaman F. Jochen Litterst Edson C. Passamani |
| author_sort | Juan A. Ramos-Guivar |
| collection | DOAJ |
| description | Real water remediation is an important issue that requires the development of novel adsorbents with remarkable adsorption properties, permitting reusability. In this work, the surface and adsorption properties of bare magnetic iron oxide nanoparticles were systematically studied, before and after the application of a maghemite nanoadsorbent in two real Peruvian effluents severely contaminated with Pb(II), Pb(IV), Fe(III), and others. We were able to describe the Fe and Pb adsorption mechanisms that occurred at the particle surface. <sup>57</sup>Fe Mössbauer and X-ray photoelectron spectroscopy results together with kinetic adsorption analyses gave evidence for two involved surface mechanisms: (i) surface deprotonation of maghemite nanoparticles (isoelectric point of pH = 2.3), forming Lewis sites bonding Pb complexes; and (ii) the formation of a thin inhomogeneous secondary layer of iron oxyhydroxide and adsorbed Pb compounds, as favored by surface physicochemical conditions. The magnetic nanoadsorbent enhanced the removal efficiency to values of ca. 96% and provided adsorptive properties with reusability due to the conserved morphological, structural, and magnetic properties. This makes it favorable for large-scale industrial applications. |
| first_indexed | 2024-03-11T03:26:56Z |
| format | Article |
| id | doaj.art-f31e345273fd4cb59c4966cf1a40f6c7 |
| institution | Directory Open Access Journal |
| issn | 2079-4991 |
| language | English |
| last_indexed | 2024-03-11T03:26:56Z |
| publishDate | 2023-05-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Nanomaterials |
| spelling | doaj.art-f31e345273fd4cb59c4966cf1a40f6c72023-11-18T02:43:14ZengMDPI AGNanomaterials2079-49912023-05-011310168410.3390/nano13101684Surface Adsorption Mechanism between Lead(II,IV) and Nanomaghemite Studied on Polluted Water Samples Collected from the Peruvian Rivers Mantaro and CumbazaJuan A. Ramos-Guivar0Noemi-Raquel Checca-Huaman1F. Jochen Litterst2Edson C. Passamani3Grupo de Investigación de Nanotecnología Aplicada Para la Biorremediación Ambiental, Energía, Biomedicina y Agricultura (NANOTECH), Facultad de Ciencias Físicas, Universidad Nacional Mayor de San Marcos, Av. Venezuela Cdra 34 S/N, Ciudad Universitaria, Lima 01, PeruCentro Brasileiro de Pesquisas Físicas, Rio de Janeiro 22290-180, RJ, BrazilInstitut fur Physik der Kondensierten Materie, Technische Universität Braunschweig, 38106 Braunschweig, GermanyDepartamento de Física, Universidade Federal do Espírito Santo -UFES, Vitória 29075-910, ES, BrazilReal water remediation is an important issue that requires the development of novel adsorbents with remarkable adsorption properties, permitting reusability. In this work, the surface and adsorption properties of bare magnetic iron oxide nanoparticles were systematically studied, before and after the application of a maghemite nanoadsorbent in two real Peruvian effluents severely contaminated with Pb(II), Pb(IV), Fe(III), and others. We were able to describe the Fe and Pb adsorption mechanisms that occurred at the particle surface. <sup>57</sup>Fe Mössbauer and X-ray photoelectron spectroscopy results together with kinetic adsorption analyses gave evidence for two involved surface mechanisms: (i) surface deprotonation of maghemite nanoparticles (isoelectric point of pH = 2.3), forming Lewis sites bonding Pb complexes; and (ii) the formation of a thin inhomogeneous secondary layer of iron oxyhydroxide and adsorbed Pb compounds, as favored by surface physicochemical conditions. The magnetic nanoadsorbent enhanced the removal efficiency to values of ca. 96% and provided adsorptive properties with reusability due to the conserved morphological, structural, and magnetic properties. This makes it favorable for large-scale industrial applications.https://www.mdpi.com/2079-4991/13/10/1684lead removalmaghemite nanoadsorbentsurface adsorption mechanismnatural polluted waters |
| spellingShingle | Juan A. Ramos-Guivar Noemi-Raquel Checca-Huaman F. Jochen Litterst Edson C. Passamani Surface Adsorption Mechanism between Lead(II,IV) and Nanomaghemite Studied on Polluted Water Samples Collected from the Peruvian Rivers Mantaro and Cumbaza Nanomaterials lead removal maghemite nanoadsorbent surface adsorption mechanism natural polluted waters |
| title | Surface Adsorption Mechanism between Lead(II,IV) and Nanomaghemite Studied on Polluted Water Samples Collected from the Peruvian Rivers Mantaro and Cumbaza |
| title_full | Surface Adsorption Mechanism between Lead(II,IV) and Nanomaghemite Studied on Polluted Water Samples Collected from the Peruvian Rivers Mantaro and Cumbaza |
| title_fullStr | Surface Adsorption Mechanism between Lead(II,IV) and Nanomaghemite Studied on Polluted Water Samples Collected from the Peruvian Rivers Mantaro and Cumbaza |
| title_full_unstemmed | Surface Adsorption Mechanism between Lead(II,IV) and Nanomaghemite Studied on Polluted Water Samples Collected from the Peruvian Rivers Mantaro and Cumbaza |
| title_short | Surface Adsorption Mechanism between Lead(II,IV) and Nanomaghemite Studied on Polluted Water Samples Collected from the Peruvian Rivers Mantaro and Cumbaza |
| title_sort | surface adsorption mechanism between lead ii iv and nanomaghemite studied on polluted water samples collected from the peruvian rivers mantaro and cumbaza |
| topic | lead removal maghemite nanoadsorbent surface adsorption mechanism natural polluted waters |
| url | https://www.mdpi.com/2079-4991/13/10/1684 |
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