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Analytical capabilities of total reflection X-ray fluorescence spectrometry for silver nanoparticles determination in soil adsorption studies

In recent years, the production of silver nanoparticles (AgNPs) has grown due to their antibacterial properties. This fact enhances the release of these particles into the environment, especially in soils that are the major sink. To better understand adsorption processes in soils, usually batch kinetic studies are carried out. In this context, we tested the possibilities of using total reflection X-ray fluorescence spectrometry (TXRF) to monitor the silver content in soil adsorption kinetic studies. It was found that the lower limit of detection for Ag (through Ag-Kα detection) in aqueous solutions was around 37 μg·L− 1, which was suitable to carry out this kind of studies. Moreover, the direct analysis of Ag adsorbed onto soil after the kinetic studies was investigated. In this case, the limit of detection for Ag was around 1.7 mg·kg− 1. All TXRF results were compared with those obtained by inductively coupled plasma optic emission spectrometry and good agreement was found. The batch adsorption tests performed showed that 98% of polyvinylpyrrolidone coated AgNPs were retained on the tested soils in < 6 h

The SpanishMinistry of Economy and Competitiveness financed this work through the project CGL2013-48802-C3-2-R (Program 2014). L. Torrent gratefully acknowledges a FPI grant from the Spanish Ministry of Science and Innovation (Ref. BES-2014-070625)

© Spectrochimica Acta - Part B Atomic Spectroscopy, 2016, vol. 126, p. 71-78

Elsevier

Autor: Torrent Fàbrega, Laura
Iglesias Juncà, Mònica
Hidalgo Muñoz, Manuela
Marguí Grabulosa, Eva
Data: 1 desembre 2016
Resum: In recent years, the production of silver nanoparticles (AgNPs) has grown due to their antibacterial properties. This fact enhances the release of these particles into the environment, especially in soils that are the major sink. To better understand adsorption processes in soils, usually batch kinetic studies are carried out. In this context, we tested the possibilities of using total reflection X-ray fluorescence spectrometry (TXRF) to monitor the silver content in soil adsorption kinetic studies. It was found that the lower limit of detection for Ag (through Ag-Kα detection) in aqueous solutions was around 37 μg·L− 1, which was suitable to carry out this kind of studies. Moreover, the direct analysis of Ag adsorbed onto soil after the kinetic studies was investigated. In this case, the limit of detection for Ag was around 1.7 mg·kg− 1. All TXRF results were compared with those obtained by inductively coupled plasma optic emission spectrometry and good agreement was found. The batch adsorption tests performed showed that 98% of polyvinylpyrrolidone coated AgNPs were retained on the tested soils in < 6 h
The SpanishMinistry of Economy and Competitiveness financed this work through the project CGL2013-48802-C3-2-R (Program 2014). L. Torrent gratefully acknowledges a FPI grant from the Spanish Ministry of Science and Innovation (Ref. BES-2014-070625)
Format: application/pdf
ISSN: 0584-8547
Accés al document: http://hdl.handle.net/10256/13453
Llenguatge: eng
Editor: Elsevier
Col·lecció: MINECO/PE 2013-2016/CGL2013-48802-C3-2-R
Reproducció digital del document publicat a: http://dx.doi.org/10.1016/j.sab.2016.10.019
Articles publicats (D-Q)
És part de: © Spectrochimica Acta - Part B Atomic Spectroscopy, 2016, vol. 126, p. 71-78
Drets: Tots els drets reservats
Matèria: Espectroscòpia de raigs X
X-ray spectroscopy
Espectroscòpia de fluorescència
Photoelectron spectroscopy
Nanopartícules
Nanoparticles
Sòls -- Absorció i adsorció
Soil absorption and adsorption
Títol: Analytical capabilities of total reflection X-ray fluorescence spectrometry for silver nanoparticles determination in soil adsorption studies
Tipus: info:eu-repo/semantics/article
Repositori: DUGiDocs

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