Nano Archive

Carbon nanotube-textured sand for controlling bioavailability of contaminated sediments

Ma, Xingmao and Anand, Deepti and Zhang, Xianfeng and Tsige, Mesfin and Talapatra, Saikat (2010) Carbon nanotube-textured sand for controlling bioavailability of contaminated sediments. Nano Research, 3 (6). pp. 412-422.

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Official URL: http://www.springerlink.com/content/02kt1547661255...

Abstract

Sand particles textured with multi-walled carbon nanotubes (MWCNTs) can efficiently control the mobility and bioavailability of contaminants found in aquatic sediments. Adsorption measurements for a wide variety of aquatic contaminants (chlorinated hydrocarbons) on MWCNT-textured sand showed orders of magnitude increase in their sorption coefficients compared to traditional materials (sand) when used for physically separating contaminated sediments from overlying water. Molecular dynamics simulations performed on model experimental systems emphasize that the hydrophobic interactions of the MWCNT surfaces play a crucial role in driving the water molecules away, promoting such enhanced contaminant uptake. The MWCNT-textured sand significantly reduced the migration of contaminants from sediments to overlying water and possesses suitable parameters needed for contaminant sequestration and sediment remediation technologies. The single step and scalable procedure described here for synthesizing robust MWCNT-textured sand surfaces will provide important improvements in the field of remediation/aquatic environment restoration technologies.

Item Type:Article
Subjects:Physical Science > Nanophysics
Physical Science > Nano objects
Material Science > Nanochemistry
Material Science > Nanostructured materials
Divisions:Faculty of Engineering, Science and Mathematics > School of Physics
Faculty of Engineering, Science and Mathematics > School of Chemistry
ID Code:9354
Deposited By:JNCASR
Deposited On:04 Oct 2010 12:10
Last Modified:04 Oct 2010 12:10

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