Earley, Sean T., Alcock, Bernadette E., Lowry, John P. and Breslin, Carmel B. (2009) Remediation of chromium(VI) at polypyrrole-coated titanium. Journal of Applied Electrochemistry, 39 (8). pp. 1251-1257. ISSN 0021-891X
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Abstract
The application of conducting polypyrrole (PPy) and polyaniline (PAni) coated substrates in remediation of chromium, Cr(VI), is an area of considerable interest. Here, we discuss the implementation of PPy-coated titanium as a new material for the reduction of Cr(VI) to the less toxic trivalent state, Cr(III). An alkaline-peroxide based etching process was used to ensure the adhesion of the PPy coatings to the underlying titanium. The PPy films showed excellent resistance to acidic Cr(VI) solutions and remained adherent after continuous exposure to the solutions. In order to optimise the remediation process a number of experimental parameters were investigated, including the thickness of the PPy coating, the reduction potential used in pre-treatment of the PPy and the degree of solution agitation. The durability of the materials on exposure to the Cr(VI) test solutions made them suitable for repeated remediation experiments. Following several test-runs, the cleanup efficiency of the material was found to decrease slightly, however, increasing the exposure/experiment time resulted in significantly improved cleanup ability.
Item Type: | Article |
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Additional Information: | Cite this article as: Earley, S.T., Alcock, B.E., Lowry, J.P. et al. J Appl Electrochem (2009) 39: 1251. doi:10.1007/s10800-009-9789-2 |
Keywords: | Electropolymerization; Chromium remediation; Pollution control; Polypyrrole; Titanium; |
Academic Unit: | Faculty of Science and Engineering > Chemistry |
Item ID: | 7921 |
Identification Number: | 0.1007/s10800-009-9789-2 |
Depositing User: | Dr. Carmel Breslin |
Date Deposited: | 14 Feb 2017 16:19 |
Journal or Publication Title: | Journal of Applied Electrochemistry |
Publisher: | Springer Verlag |
Refereed: | Yes |
Funders: | Health Research Board (HRB), Environmental Protection Agency (EPA) |
Related URLs: | |
URI: | https://mu.eprints-hosting.org/id/eprint/7921 |
Use Licence: | This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here |
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