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Removal of carbon nanotubes from aqueous environment with filter paper.
- Source :
-
Chemosphere [Chemosphere] 2011 Jan; Vol. 82 (4), pp. 621-6. Date of Electronic Publication: 2010 Nov 10. - Publication Year :
- 2011
-
Abstract
- The potential health and environmental hazards of carbon nanotubes (CNTs) have been a concerned issue. However, in contrast to the wide recognition of the toxicity of CNTs, little attention has been paid to the decontamination/remediation of CNT pollution. In this study, we report that CNTs can be removed from aqueous environment. In the presence of Ca²(+), CNTs aggregate quickly to micron size and then enable easy and effective removal via normal filtration. After filtration, CNT suspension becomes colorless with the remnant CNT concentration less than 0.5 μg mL⁻¹, a safe dose based on the published data. The filtration approach also works well in the presence of typical surfactant and dissolved organic matter. The removal efficiency is Ca²(+) concentration-dependent and regulated by the initial pH value and ionic strength. Our study is helpful for future decontamination of CNTs from aqueous environment.<br /> (Copyright © 2010 Elsevier Ltd. All rights reserved.)
- Subjects :
- Adsorption
Hydrogen-Ion Concentration
Microscopy, Electron, Transmission
Nanotubes, Carbon analysis
Nanotubes, Carbon ultrastructure
Osmolar Concentration
Paper
Polysorbates chemistry
Water Pollutants, Chemical analysis
Filtration methods
Nanotubes, Carbon chemistry
Water Pollutants, Chemical chemistry
Water Purification methods
Subjects
Details
- Language :
- English
- ISSN :
- 1879-1298
- Volume :
- 82
- Issue :
- 4
- Database :
- MEDLINE
- Journal :
- Chemosphere
- Publication Type :
- Academic Journal
- Accession number :
- 21071063
- Full Text :
- https://doi.org/10.1016/j.chemosphere.2010.10.048