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Please use this identifier to cite or link to this item: http://hdl.handle.net/10373/1271

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Title: Transport of titanium dioxide nanoparticles in saturated porous media under various solution chemistry conditions
Authors: Wang, Yu
Gao, Bin
Morales, Verónica L.
Tian, Yuan
Wu, Lei
Gao, Jie
Bai, Wei
Yang, Liuyan
Affiliation: University of Abertay Dundee. Scottish Informatics, Mathematics, Biology and Statistics Centre
Keywords: Titanium oxides
Solution chemistry
Issue Date: 2012
Publisher: Springer Verlag
Type: Journal Article
Refereed: peer-reviewed
Rights: This is the author's final version of this article. Published version © Springer-Verlag. The final publication is available at Springer via http://dx.doi.org/10.1007/s11051-012-1095-y
Citation: Wang, Y., et al. 2012. Transport of titanium dioxide nanoparticles in saturated porous media under various solution chemistry conditions. Journal of Nanoparticle Research. 14(9). Available from http://dx.doi.org/10.1007/s11051-012-1095-y
Abstract: Because of its wide applications, nanosized titanium dioxide may become a potential environmental risk to soil and groundwater system. It is therefore important to improve current understanding of the environmental fate and transport of titanium oxides nanoparticles (TONPs). In this work, the effect of solution chemistry (i.e., pH, ionic strength, and natural organic matter (NOM) concentration) on the deposition and transport of TONPs in saturated porous media was examined in detail. Laboratory columns packed with acid-cleaned quartz sand were used in the experiment as porous media. Transport experiments were conducted with various chemistry combinations, including four ionic strengths, three pH levels, and two NOM concentrations. The results showed that TONP mobility increased with increasing solution pH, but decreased with increasing solution ionic strength. It is also found that the presence of NOM in the system enhanced the mobility of TONPs in the saturated porous media. The Derjaguin–Landau–Verwey–Overbeek (DLVO) theory was used to justify the mobility trends observed in the experimental data. Predictions from the theory agreed excellently with the experimental data.
URI: http://hdl.handle.net/10373/1271
ISSN: 1388-0764
Appears in Collections:SIMBIOS Collection

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