Effect of Humic and Fulvic Acids on the Photocatalytic Degradation of N, N-diethyl-m-toluamide (DEET) Using TiO2 Suspensions and Simulated Solar Light
The photocatalysis of DEET was examined using aqueous TiO2 dispersions in the presence of various concentrations of humic acid (HA) and fulvic acid (FA) in order to simulate the influence of natural organic matter (NOM) present during water treatment.Pseudo-first-order kinetics were observed for each set of samples.A decrease in the photodegradation of DEET was observed after the addition of a Lignite HA,whereas a slight increase of the photocatalytic activity was observed using the Synthetic-HA (aromatic ring-rich) for the lower HA concentrations.The addition of FA was found more beneficial for the photocatalytic degradation of DEET.Retardation of photocatalysis could be attributed to the combination of radiation attenuation,competition for active sites-surface deactivation of the catalyst by adsorption and radical scavenging,while enhancement effects could be attributed to e-transfer processes,conduction band (cb) TiO2 e-capture for HA and photosensitization (e-injection to TiO2) for FA.
DEET Humic Fulvic acids Photocatalytic
I.K.Konstantinou Y.Deligiannakis
Department of Environmental and Natural Resources Management,University of Western Greece(formerly University of Ioannina),Seferi 2,30100,Agrinio
国际会议
the 16th Meeting of the International Humic Substances Society (第十六届国际腐殖物质学会大会(IHSS 16))
杭州
英文
353-355
2012-09-09（万方平台首次上网日期，不代表论文的发表时间）