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Photocatalytic removal of 2,4,6-trichlorophenol from water exploiting commercial ZnO powder.


Gaya, Umar Ibrahim and Abdullah, Abdul Halim and Hussein, Mohd. Zobir and Zainal, Zulkarnain (2010) Photocatalytic removal of 2,4,6-trichlorophenol from water exploiting commercial ZnO powder. Desalination, 263 (1-3). pp. 176-182. ISSN 0011-9164


2,4,6-trichlorophenol is an important water pollutant owing to the severity of its toxicity. The aqueous phase photocatalytic oxidation of 2,4,6-trichlorophenol over ZnO was investigated as a potential method for the abatement of this pollutant. The effects of operating parameters such as initial ZnO doses and substrate concentration on the removal of 2,4,6-trichlorophenol were studied and optimised at 0.75 g L− 1 and 50 mg L− 1, respectively. The photocatalytic system afforded the highest degradation efficiency at neutral pH. The decomposition of 2,4,6-trichlorophenol by the photoprocess agreed satisfactorily with pseudo zero-order kinetic model. The effect of the presence of SO42−, S2O82−, HPO42− and Cl− on the 2,4,6-trichlorophenol removal rate was for the first time revealed. Some hitherto unreported pathway intermediates of ZnO-assisted 2,4,6-trichlorophenol degradation were recorded using gas chromatography–mass spectrometry (GC–MS) and high performance liquid chromatography (HPLC). A tentative reaction mechanism for the formation of these intermediates was proposed.

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Additional Metadata

Item Type: Article
Divisions: Faculty of Science
DOI Number: https://doi.org/10.1016/j.desal.2010.06.055
Publisher: Elsevier
Keywords: Photocatalysis; Intermediates; 2,4,6-Trichlorophenol removal; ZnO; Anions.
Depositing User: Najwani Amir Sariffudin
Date Deposited: 21 Aug 2013 07:48
Last Modified: 26 Nov 2015 09:01
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1016/j.desal.2010.06.055
URI: http://psasir.upm.edu.my/id/eprint/16186
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