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On-line micro column preconcentration system based on amino bimodal mesoporous silica nanoparticles as a novel adsorbent for removal and speciation of chromium (III, VI) in environmental samples
BACKGROUND: Chromium (VI) has toxic and carcinogenic effects. So, determination and speciation of chromium in environmental samples is very important in view of health hazards. In this study, solid phase extraction (SPE) based on bulky amine-functionalized bimodal mesoporous silica nanoparticles (NH...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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BioMed Central
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4940767/ https://www.ncbi.nlm.nih.gov/pubmed/27408748 http://dx.doi.org/10.1186/s40201-015-0205-z |
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author | Shirkhanloo, Hamid Khaligh, Aisan Golbabaei, Farideh Sadeghi, Zargham Vahid, Amir Rashidi, Alimorad |
author_facet | Shirkhanloo, Hamid Khaligh, Aisan Golbabaei, Farideh Sadeghi, Zargham Vahid, Amir Rashidi, Alimorad |
author_sort | Shirkhanloo, Hamid |
collection | PubMed |
description | BACKGROUND: Chromium (VI) has toxic and carcinogenic effects. So, determination and speciation of chromium in environmental samples is very important in view of health hazards. In this study, solid phase extraction (SPE) based on bulky amine-functionalized bimodal mesoporous silica nanoparticles (NH(2)-UVM-7) as a novel nanoadsorbent was applied for preconcentration and speciation of chromium (III, VI) in water samples. METHODS: UVM-7 was synthesized via atrane route and subsequently functionalized with amino silane via grafting method. In SPE procedure, polymer tubing as a micro-column was filled with NH(2)-UVM-7 adsorbent. Preconcentration and speciation of Cr (III) and Cr (VI) ions with NH(2)-UVM-7 were obtained in water samples due to the fact that only Cr (VI) ions can be complexed with-NH(2) groups at optimized pH. Finally, chromium concentration was determined by flame atomic absorption spectrometry (F-AAS). RESULTS: TEM, XRD, and SEM results confirmed the beneficial properties of NH(2)-UVM-7 as the adsorbent for chromium extraction. Under the optimal conditions, linear calibration curve, detection limit and preconcentration factor were obtained 6–320 μg/ L, 1.2 μg/L and 66.7, respectively (RSD < 5 %). The efficiency of nanoadsorbent for preconcentration and extraction of Cr (VI) was 96 %, whereas it was less than 5 % for Cr (III). CONCLUSIONS: The developed NH(2)-UVM7-based SPE/F-AAS method has enough sensitively and simplicity for speciation and determination of Cr (VI) and Cr (III) ions in real water samples. Good recoveries, with low detection limits and good preconcentration factors are the main advantages of this procedure. |
format | Online Article Text |
id | pubmed-4940767 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | BioMed Central |
record_format | MEDLINE/PubMed |
spelling | pubmed-49407672016-07-13 On-line micro column preconcentration system based on amino bimodal mesoporous silica nanoparticles as a novel adsorbent for removal and speciation of chromium (III, VI) in environmental samples Shirkhanloo, Hamid Khaligh, Aisan Golbabaei, Farideh Sadeghi, Zargham Vahid, Amir Rashidi, Alimorad J Environ Health Sci Eng Research Article BACKGROUND: Chromium (VI) has toxic and carcinogenic effects. So, determination and speciation of chromium in environmental samples is very important in view of health hazards. In this study, solid phase extraction (SPE) based on bulky amine-functionalized bimodal mesoporous silica nanoparticles (NH(2)-UVM-7) as a novel nanoadsorbent was applied for preconcentration and speciation of chromium (III, VI) in water samples. METHODS: UVM-7 was synthesized via atrane route and subsequently functionalized with amino silane via grafting method. In SPE procedure, polymer tubing as a micro-column was filled with NH(2)-UVM-7 adsorbent. Preconcentration and speciation of Cr (III) and Cr (VI) ions with NH(2)-UVM-7 were obtained in water samples due to the fact that only Cr (VI) ions can be complexed with-NH(2) groups at optimized pH. Finally, chromium concentration was determined by flame atomic absorption spectrometry (F-AAS). RESULTS: TEM, XRD, and SEM results confirmed the beneficial properties of NH(2)-UVM-7 as the adsorbent for chromium extraction. Under the optimal conditions, linear calibration curve, detection limit and preconcentration factor were obtained 6–320 μg/ L, 1.2 μg/L and 66.7, respectively (RSD < 5 %). The efficiency of nanoadsorbent for preconcentration and extraction of Cr (VI) was 96 %, whereas it was less than 5 % for Cr (III). CONCLUSIONS: The developed NH(2)-UVM7-based SPE/F-AAS method has enough sensitively and simplicity for speciation and determination of Cr (VI) and Cr (III) ions in real water samples. Good recoveries, with low detection limits and good preconcentration factors are the main advantages of this procedure. BioMed Central 2015-05-22 /pmc/articles/PMC4940767/ /pubmed/27408748 http://dx.doi.org/10.1186/s40201-015-0205-z Text en © Shirkhanloo et al.; licensee BioMed Central. 2015 This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly credited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated. |
spellingShingle | Research Article Shirkhanloo, Hamid Khaligh, Aisan Golbabaei, Farideh Sadeghi, Zargham Vahid, Amir Rashidi, Alimorad On-line micro column preconcentration system based on amino bimodal mesoporous silica nanoparticles as a novel adsorbent for removal and speciation of chromium (III, VI) in environmental samples |
title | On-line micro column preconcentration system based on amino bimodal mesoporous silica nanoparticles as a novel adsorbent for removal and speciation of chromium (III, VI) in environmental samples |
title_full | On-line micro column preconcentration system based on amino bimodal mesoporous silica nanoparticles as a novel adsorbent for removal and speciation of chromium (III, VI) in environmental samples |
title_fullStr | On-line micro column preconcentration system based on amino bimodal mesoporous silica nanoparticles as a novel adsorbent for removal and speciation of chromium (III, VI) in environmental samples |
title_full_unstemmed | On-line micro column preconcentration system based on amino bimodal mesoporous silica nanoparticles as a novel adsorbent for removal and speciation of chromium (III, VI) in environmental samples |
title_short | On-line micro column preconcentration system based on amino bimodal mesoporous silica nanoparticles as a novel adsorbent for removal and speciation of chromium (III, VI) in environmental samples |
title_sort | on-line micro column preconcentration system based on amino bimodal mesoporous silica nanoparticles as a novel adsorbent for removal and speciation of chromium (iii, vi) in environmental samples |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4940767/ https://www.ncbi.nlm.nih.gov/pubmed/27408748 http://dx.doi.org/10.1186/s40201-015-0205-z |
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