Carbon nanocages as heavy metal ion adsorbents
Saved in:
| Title: | Carbon nanocages as heavy metal ion adsorbents |
|---|---|
| Authors: | Burke, David M.1, O'Byrne, Justin P.1, Fleming, Peter G.1, Borah, Dipu1, Morris, Michael A.1,2, Holmes, Justin D.1,2 j.holmes@ucc.ie |
| Source: | Desalination. Oct2011, Vol. 280 Issue 1-3, p87-94. 8p. |
| Subjects: | Contamination of drinking water, Carbon, Heavy metal absorption & adsorption, Metal ions, Health risk assessment, Solution (Chemistry), Temperature effect, Supercritical fluids, Environmental remediation, Industrial wastes |
| Abstract: | Abstract: Heavy metal ion contamination in drinking water poses a major risk to human health, whilst contamination in wastewater streams can cause damage to the wider environment. In this study carbon nanocages, synthesised using a supercritical fluid deposition method, were examined as adsorbents of Pb2+ ions from aqueous solutions. Through careful selection of the catalyst and the carbon deposition temperature and pressure, high yields of nanocages with surface areas up to 1175m2 g−1 were synthesised. These high surface area materials were subsequently tested for their ability to absorb Pb2+ ions, as a function of pH, from simulated wastewater. The nanocages were found to be effective at removing the Pb2+ ions at levels of 11.1mgg−1, compared to 7.6mgg−1 for commercially available activated carbon. The kinetics of metal ion adsorption by the nanocages and activated carbon can be described by a pseudo-second-order kinetics model, with a rate coefficient (k 2) of 4.8×102 gmg−1 min−1. [Copyright &y& Elsevier] |
| Copyright of Desalination is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
Be the first to leave a comment!
