Advanced Oxidation Kinetics and Mechanism of Preservative Propylparaben Degradation in Aqueous Suspension of TiO2 and Risk Assessment of Its Degradation Products

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	Advanced Oxidation Kinetics and Mechanism of Preservative Propylparaben Degradation in Aqueous Suspension of TiO2 and Risk Assessment of Its Degradation Products
	Fang, Hansun; Gao, Yanpeng; Li, Guiying; An, Jibin; Wong, Po-Keung; Fu, Haiying(付海英）; Yao, Side（姚思德）; Nie, Xiangping; An, Taicheng
	2013
Source Publication	ENVIRONMENTAL SCIENCE & TECHNOLOGY
ISSN	0013-936X
Volume	47 Issue:6 Pages:CONCATENATE(Sheet1!I24,-Sheet1!J24)
Abstract	The absolute kinetic rate constants of propylparaben (PPB) in water with different free radicals were investigated, and it was found that both hydroxyl radicals (HO center dot) and hydrated electrons could rapidly react with PPB. The advanced oxidation kinetics and mechanisms of PPB were investigated using photocatalytic process as a model technology, and the degradation was found to be a pseudo-first-order model. Oxidative species, particularly HO center dot, were the most important reactive oxygen species mediating photocatalytic degradation of PPB, and PPB degradation was found to be significantly affected by pH because it was controlled by the radical reaction mechanism and was postulated to occur primarily via HO center dot-addition or H-abstraction reactions on the basis of pulse radiolysis measurements and observed reaction products. To investigate potential risk of PPB to humans and aqueous organisms, the estrogenic assays and bioassays were performed using 100 mu M PPB solution degraded by photocatalysis at specific intervals. The estrogenic activity decreased as PPB was degraded, while the acute toxicity at three trophic levels first increased slowly and then decreased rapidly as the total organic carbon decreased during photocatalytic degradation.
Indexed By	SCI
Language	英语
Funding Project	应物所项目组
WOS ID	WOS:000316594000035
Citation statistics
Document Type	期刊论文
Identifier	http://ir.sinap.ac.cn/handle/331007/13664
Collection	中科院上海应用物理研究所2011-2020年
Recommended Citation GB/T 7714	Fang, Hansun,Gao, Yanpeng,Li, Guiying,et al. Advanced Oxidation Kinetics and Mechanism of Preservative Propylparaben Degradation in Aqueous Suspension of TiO2 and Risk Assessment of Its Degradation Products[J]. ENVIRONMENTAL SCIENCE & TECHNOLOGY,2013,47(6):CONCATENATE(Sheet1!I24,-Sheet1!J24).
APA	Fang, Hansun.,Gao, Yanpeng.,Li, Guiying.,An, Jibin.,Wong, Po-Keung.,...&An, Taicheng.(2013).Advanced Oxidation Kinetics and Mechanism of Preservative Propylparaben Degradation in Aqueous Suspension of TiO2 and Risk Assessment of Its Degradation Products.ENVIRONMENTAL SCIENCE & TECHNOLOGY,47(6),CONCATENATE(Sheet1!I24,-Sheet1!J24).
MLA	Fang, Hansun,et al."Advanced Oxidation Kinetics and Mechanism of Preservative Propylparaben Degradation in Aqueous Suspension of TiO2 and Risk Assessment of Its Degradation Products".ENVIRONMENTAL SCIENCE & TECHNOLOGY 47.6(2013):CONCATENATE(Sheet1!I24,-Sheet1!J24).

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