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Title: Removal of the insect repellent N,N-diethyl-m-toluamide (DEET) by laccase-mediated systems
Authors: Tran, N.H.
Hu, J. 
Urase, T.
Keywords: DEET
Fungal laccase
Redox mediators
Issue Date: Nov-2013
Citation: Tran, N.H., Hu, J., Urase, T. (2013-11). Removal of the insect repellent N,N-diethyl-m-toluamide (DEET) by laccase-mediated systems. Bioresource Technology 147 : 667-671. ScholarBank@NUS Repository.
Abstract: Numerous efforts have been made to remove emerging trace organic contaminants, such as pharmaceuticals and personal care products (PPCPs). This study examined the removal of N,N-diethyl-m-toluamide (DEET) by Trametes versicolor laccase and its laccase-mediator systems. Experimental results showed that DEET was poorly removed by laccase alone. The poor removal efficiency of DEET by laccase may be attributed to the presence of strong withdrawing electron group (-CO-N [CH2-CH3]2) in the chemical structure of DEET. Experimental results also indicated that DEET might be indirectly oxidized by laccase-mediator systems. More than 50% initial DEET amount was removed by laccase in the presence of a redox mediator, such as 2,2'-azino-bis[3-ethylbenzothiazoline-6-sulphonic acid] (ABTS) or 1-hydroxybenzotriazole (HBT). However, laccase activity was considerably decreased in the presence of a redox mediator (ABTS or HBT). Further studies on identification of degradation byproducts and degradation pathways are recommended. © 2013 .
Source Title: Bioresource Technology
ISSN: 09608524
DOI: 10.1016/j.biortech.2013.08.113
Appears in Collections:Staff Publications

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