Photocatalytic degradation of 17 alpha-ethinylestradiol in mono- and   binary systems of fulvic acid and Fe(III): Application of fluorescence   excitation/emission matrixes

doi:10.1016/j.cej.2013.10.002

CORC > 北京大学 > 环境科学与工程学院

	Photocatalytic degradation of 17 alpha-ethinylestradiol in mono- and binary systems of fulvic acid and Fe(III): Application of fluorescence excitation/emission matrixes
	Li, Si ; Sun, Weiling
刊名	chemical engineering journal
	2014
关键词	Photocatalysis Excitation/emission matrix (EEM) fluorescence 17 alpha-Ethinylestradiol Fulvic acid Ferric ion DISSOLVED ORGANIC-MATTER ENDOCRINE-DISRUPTING CHEMICALS AQUEOUS-SOLUTION WASTE-WATER HUMIC-ACID 17-BETA-ESTRADIOL E2 FERRIC IONS PHOTODEGRADATION OXIDATION TIO2
DOI	10.1016/j.cej.2013.10.002
英文摘要	Excitation/emission matrix (EEM) fluorescence spectroscopy was employed to characterize the photocatalytic degradation of 17 alpha-ethinylestradiol (EE2) in mono- and binary systems of fulvic acid (FA) and ferric ions (Fe(III)). The decrease in fluorescence intensities of two characteristic peaks of EE2, whether at the peak maxima or regional integration, could be well described by the pseudo-first-order reaction kinetics. Photocatalysis was promoted by Fe(III) at low concentrations whereas inhibited by FA. Suppression in photocatalysis was observed in binary systems of FA and Fe(III), which can be attributed to photons competition of the FA-Fe(III) complex and aggregation of TiO2 particles. The kinetics rate constants determined by EEM, with relatively lower values, had significant linear correlations (p < 0.01) with those determined by EE2 concentration quantified using HPLC-MS. The relatively lower rate constants determined by EEM imply the formation of some fluorescent intermediates. This was verified by using the model compound phenol. The blue shifts of the fluorescent peaks of EE2 implied the decrease in aromatic moieties during photocatalysis. The results indicate that the fluorescence EEM can serve as a simple but utility tool for comparing the photocatalytic degradation kinetics and structural changes of EE2 under various conditions. (C) 2013 Elsevier B.V. All rights reserved.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000329891900014&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Engineering, Environmental; Engineering, Chemical; SCI(E); EI; 5; ARTICLE; wlsun@pku.edu.cn; 101-108; 237
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/217781]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Li, Si,Sun, Weiling. Photocatalytic degradation of 17 alpha-ethinylestradiol in mono- and binary systems of fulvic acid and Fe(III): Application of fluorescence excitation/emission matrixes[J]. chemical engineering journal,2014.
APA	Li, Si,&Sun, Weiling.(2014).Photocatalytic degradation of 17 alpha-ethinylestradiol in mono- and binary systems of fulvic acid and Fe(III): Application of fluorescence excitation/emission matrixes.chemical engineering journal.
MLA	Li, Si,et al."Photocatalytic degradation of 17 alpha-ethinylestradiol in mono- and binary systems of fulvic acid and Fe(III): Application of fluorescence excitation/emission matrixes".chemical engineering journal (2014).