title: Degradation of N,N-diethyl-m-toluamid (DEET) on lead dioxide electrodes in different environmental aqueous matrixes.
abstract: This study investigates the electrochemical degradation of N,N-diethyl-m-toluamide (DEET) on PbO2 and Bi-PbO2 anodes. The difference in electrode crystalline structure was responsible for the better DEET degradation and TOC removal on PbO2 than on Bi-PbO2. In 1 M Na2SO4, the degradation efficiency and apparent rate constant (kapp) of DEET oxidation on PbO2 increased with the increase in current density or temperature (activation energy=24.4 kJ mol(-1)). The kapp values in DEET-spiked environmental matrixes (municipal wastewater treatment plant secondary effluent (MWTPSE), groundwater (GW), and river water (RW)) were the same (6.05×10(-4) s(-1)), but significantly smaller than that in 1 M Na2SO4 (2.23×10(-3) s(-1)). The TOC removal efficiency was better in MWTPSE than in RW and GW; however, the mineralization current efficiencies in MWTPSE and RW were similar but higher than that in GW. During electrolysis, the aromaticity was lower in GW than in RW.
authors.affiliation: a Department of Environmental Science and Engineering , National Pingtung University of Science and Technology , Pingtung , Taiwan.
authors.forename: Kuo-Lin
authors.initials: KL
authors.lastname: Huang
authors.forename: Te-San
authors.initials: TS
authors.lastname: Chen
authors.forename: Pi-Hui
authors.initials: PH
authors.lastname: Chen
authors.forename: Yi-Ming
authors.initials: YM
authors.lastname: Kuo
mesh_terms: D003671:DEET / Q000737:chemistry*; D004566:Electrodes; D004572:Electrolysis; D007854:Lead / Q000737:chemistry*; D010084:Oxidation-Reduction; D010087:Oxides / Q000737:chemistry*; D013696:Temperature; D062065:Wastewater / Q000737:chemistry*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D003671:DEET; D007854:Lead; D010087:Oxides; D062065:Wastewater; D014874:Water Pollutants, Chemical; C047365:lead oxide
keywords: Aromaticity; N-diethyl-m-toluamide (DEET); PbO2 anode; electrochemical degradation; environmental matrix N