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Heterogeneous photocatalysed degradation of an insecticide derivative acetamiprid in aqueous suspensions of semiconductor

Khan, A. and Haque, M. M. and Mir, Niyaz A. and Muneer, M. and Boxall, C. (2010) Heterogeneous photocatalysed degradation of an insecticide derivative acetamiprid in aqueous suspensions of semiconductor. Desalination, 261 (1-2). pp. 169-174. ISSN 0011-9164

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Abstract

The photocatalytic degradation of an insecticide derivative, acetamiprid has been investigated in aqueous suspensions of titanium dioxide (TiO2) as a function of irradiation time under a variety of conditions using UV-Vis and HPLC analysis techniques. The degradation kinetics were studied under different conditions such as types of TiO2, catalyst and substrate concentration, reaction pH and in the presence of electron acceptors like hydrogen peroxide (H2O2), potassium bromate (KBrO3), and potassium persulphate (K2S2O8) besides molecular oxygen (O-2). The degradation rates were found to be strongly influenced by all the above parameters. The photocatalyst, Degussa P25 was found to be more efficient as compared to other TiO2 powders used under these studies. The model compound was found to degrade more efficiently in alkaline pH and all electron acceptors enhanced the degradation rate. GC/MS analysis of the irradiated samples indicated the formation of several by-products. A probable mechanism for the formation of by-products has been proposed. (C) 2010 Elsevier B.V. All rights reserved.

Item Type: Article
Journal or Publication Title: Desalination
Uncontrolled Keywords: Photocatalytic degradation ; Semiconductor ; Titanium dioxide ; Insecticide ; Acetamiprid ; TITANIUM-DIOXIDE ; TIO2 ; WATER ; CATALYST
Subjects:
Departments: Faculty of Science and Technology > Engineering
Faculty of Science and Technology > School of Computing & Communications
ID Code: 52690
Deposited By: ep_importer_pure
Deposited On: 29 Feb 2012 12:13
Refereed?: Yes
Published?: Published
Last Modified: 09 Apr 2014 23:06
Identification Number:
URI: http://eprints.lancs.ac.uk/id/eprint/52690

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