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Transport and aggregation of Al2O3 nanoparticles through saturated limestone under high ionic strength conditions: measurements and mechanisms

Aluminum oxide (Al2O3) nanoparticles (NPs) are being utilized in a broad range of applications; thus, noticeable quantities of these particles are being released into the environment. Issues of how and where these particles distribute into the subsurface remain major challenges. In this study, mecha...

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Main Authors: Bayat, Ali Esfandyari, Junin, Radzuan, Ghadikolaei, Farshad Daraei, Piroozian, Ali
Format: Article
Published: Kluwer Academic Publishers 2014
Subjects:
TN Mining engineering. Metallurgy
Online Access:http://eprints.utm.my/id/eprint/63120/
http://dx.doi.org/10.1007/s11051-014-2747-x
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spelling my.utm.631202017-06-15T01:40:16Z http://eprints.utm.my/id/eprint/63120/ Transport and aggregation of Al2O3 nanoparticles through saturated limestone under high ionic strength conditions: measurements and mechanisms Bayat, Ali Esfandyari Junin, Radzuan Ghadikolaei, Farshad Daraei Piroozian, Ali TN Mining engineering. Metallurgy Aluminum oxide (Al2O3) nanoparticles (NPs) are being utilized in a broad range of applications; thus, noticeable quantities of these particles are being released into the environment. Issues of how and where these particles distribute into the subsurface remain major challenges. In this study, mechanisms governing the transport and aggregation of Al2O3-NPs (Alpha-40 nm) through saturated limestone porous media under different ionic strength conditions were evaluated. For this aim, 50 mg of Al2O3-NPs was dispersed in 1 L of different electrolyte solutions including NaCl and CaCl2. Ionic strength range was selected from deionized water up to 500 mM. Breakthrough curves in the column effluent were measured by UV–VIS spectrometry. It was found that the presence of NaCl and CaCl2 in the suspensions led to formation of ion bridges among NPs. Thus, the stability of Al2O3-NPs significantly declined and NPs started to flocculate and form bigger clusters. Furthermore, ionic strength caused considerable delay in NPs breakthrough in the effluents and reduction of NPs recovery. CaCl2 compared to NaCl was found more effective in instability and deposition of Al2O3-NPs. In addition, the obtained results from transport experiments were checked against classical filtration and Derjaguin–Landau–Verwey–Overbeek (DLVO) theories. The results were found to be in agreement with named theories. Kluwer Academic Publishers 2014 Article PeerReviewed Bayat, Ali Esfandyari and Junin, Radzuan and Ghadikolaei, Farshad Daraei and Piroozian, Ali (2014) Transport and aggregation of Al2O3 nanoparticles through saturated limestone under high ionic strength conditions: measurements and mechanisms. Journal of Nanoparticle Research, 16 (12). ISSN 1388-0764 http://dx.doi.org/10.1007/s11051-014-2747-x DOI:10.1007/s11051-014-2747-x
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic TN Mining engineering. Metallurgy
spellingShingle TN Mining engineering. Metallurgy
Bayat, Ali Esfandyari
Junin, Radzuan
Ghadikolaei, Farshad Daraei
Piroozian, Ali
Transport and aggregation of Al2O3 nanoparticles through saturated limestone under high ionic strength conditions: measurements and mechanisms
description Aluminum oxide (Al2O3) nanoparticles (NPs) are being utilized in a broad range of applications; thus, noticeable quantities of these particles are being released into the environment. Issues of how and where these particles distribute into the subsurface remain major challenges. In this study, mechanisms governing the transport and aggregation of Al2O3-NPs (Alpha-40 nm) through saturated limestone porous media under different ionic strength conditions were evaluated. For this aim, 50 mg of Al2O3-NPs was dispersed in 1 L of different electrolyte solutions including NaCl and CaCl2. Ionic strength range was selected from deionized water up to 500 mM. Breakthrough curves in the column effluent were measured by UV–VIS spectrometry. It was found that the presence of NaCl and CaCl2 in the suspensions led to formation of ion bridges among NPs. Thus, the stability of Al2O3-NPs significantly declined and NPs started to flocculate and form bigger clusters. Furthermore, ionic strength caused considerable delay in NPs breakthrough in the effluents and reduction of NPs recovery. CaCl2 compared to NaCl was found more effective in instability and deposition of Al2O3-NPs. In addition, the obtained results from transport experiments were checked against classical filtration and Derjaguin–Landau–Verwey–Overbeek (DLVO) theories. The results were found to be in agreement with named theories.
format Article
author Bayat, Ali Esfandyari
Junin, Radzuan
Ghadikolaei, Farshad Daraei
Piroozian, Ali
author_facet Bayat, Ali Esfandyari
Junin, Radzuan
Ghadikolaei, Farshad Daraei
Piroozian, Ali
author_sort Bayat, Ali Esfandyari
title Transport and aggregation of Al2O3 nanoparticles through saturated limestone under high ionic strength conditions: measurements and mechanisms
title_short Transport and aggregation of Al2O3 nanoparticles through saturated limestone under high ionic strength conditions: measurements and mechanisms
title_full Transport and aggregation of Al2O3 nanoparticles through saturated limestone under high ionic strength conditions: measurements and mechanisms
title_fullStr Transport and aggregation of Al2O3 nanoparticles through saturated limestone under high ionic strength conditions: measurements and mechanisms
title_full_unstemmed Transport and aggregation of Al2O3 nanoparticles through saturated limestone under high ionic strength conditions: measurements and mechanisms
title_sort transport and aggregation of al2o3 nanoparticles through saturated limestone under high ionic strength conditions: measurements and mechanisms
publisher Kluwer Academic Publishers
publishDate 2014
url http://eprints.utm.my/id/eprint/63120/
http://dx.doi.org/10.1007/s11051-014-2747-x
_version_ 1643655624429404160
score 13.211869

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