Sorption and desorption of phenanthrene onto iron, copper, and silicon dioxide nanoparticles

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境化学与生态毒理学国家重点实验室

	Sorption and desorption of phenanthrene onto iron, copper, and silicon dioxide nanoparticles
	Fang, Jing ; Shan, Xiao-quan ; Wen, Bei ; Lin, Jin-ming ; Lu, Xian-cai ; Liu, Xian-dong ; Owens, Gary
刊名	LANGMUIR
	2008-10-07
卷号	24 期号:19 页码:10929-10935
英文摘要	The sorption and desorption of phenanthrene by three engineered nanoparticles including nanosize zerovalent iron (NZVI), copper (NZVC), and silicon dioxide (NSiO2) were investigated. The sorption of phenanthrene onto NSiO2 was linear and reversible due to the hydrophilic properties of NSiO2, In comparison, sorption of phenanthrene onto NZVI and NZVC was nonlinear and irreversible, which was potentially due to the existence of significantly heterogeneous surface energy distribution patterns detected by a standard molecular probe technique. Naphthalene exerted significant competitive sorption with phenanthrene for NZVI and NZVC, and the isotherm of phenanthrene changed from being significantly nonlinear to nearly linear when naphthalene was simultaneously absorbed. A surface adsorption mechanism was proposed to explain the observed sorption and competition of phenanthrene on both NZVI and NZVC. In contrast, no competition was observed for sorption onto NSiO2. The sorption of phenanthrene on all three nanoparticles significantly decreased with increasing pH. The sorption irreversibility of phenanthrene on NZVI and NZVC were significantly enhanced with decreasing pH. A pH-dependent hydrophobic effect and dipole interactions between the charged surface (electron acceptors) and phenanthrene with electron-rich pi systems (electron donors) were proposed to explain the observed pH-dependent sorption.
WOS记录号	WOS:000259673500062
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/21995]
专题	生态环境研究中心_环境化学与生态毒理学国家重点实验室
推荐引用方式 GB/T 7714	Fang, Jing,Shan, Xiao-quan,Wen, Bei,et al. Sorption and desorption of phenanthrene onto iron, copper, and silicon dioxide nanoparticles[J]. LANGMUIR,2008,24(19):10929-10935.
APA	Fang, Jing.,Shan, Xiao-quan.,Wen, Bei.,Lin, Jin-ming.,Lu, Xian-cai.,...&Owens, Gary.(2008).Sorption and desorption of phenanthrene onto iron, copper, and silicon dioxide nanoparticles.LANGMUIR,24(19),10929-10935.
MLA	Fang, Jing,et al."Sorption and desorption of phenanthrene onto iron, copper, and silicon dioxide nanoparticles".LANGMUIR 24.19(2008):10929-10935.