Magnetic metal-organic frameworks nanocomposites for negligible-depletion solid-phase extraction of freely dissolved polyaromatic hydrocarbons

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

	Magnetic metal-organic frameworks nanocomposites for negligible-depletion solid-phase extraction of freely dissolved polyaromatic hydrocarbons
	Li, Yingjie 1; Zhou, Xiaoxia ; Dong, Lijie ; Lai, Yujian ; Li, Shasha ; Liu, Rui ; Liu, Jingfu
刊名	ENVIRONMENTAL POLLUTION
	2019-09-01
卷号	252 页码:1574-1581
关键词	Metal-organic frameworks Negligible depletion extraction Restricted-access Environmental pollutants Freely dissolved concentration
ISSN号	0269-7491
英文摘要	The bioavailability of a pollutant is usually evaluated based on its freely dissolved concentration (C-free), which can be measured by negligible-depletion equilibrium extraction that is commonly suffered from long equilibration time. Herein, metal-organic framework (MOF) composites (Fe3O4@MIL-101), consists of a magnetic Fe3O4 core and a MIL-101 (Cr) MOF shell, is developed as sorbents for negligible-depletion magnetic solid-phase extraction (nd-MSPE) of freely dissolved polyaromatic hydrocarbons (PAHs) in environmental waters. The freely dissolved PAHs in 1000 mL water samples are extracted with 1.5 mg MOF composites, and desorbed with 0.9 mL of acetonitrile under sonication for 5 min. The MOF composites exclude the extraction of dissolved organic matter (DOM) and DOM-associated PAHs by size exclusion. Additionally, the combined interactions (hydrophobic, pi-pi and pi-complexation) between PAHs and composites markedly reduced the extraction equilibration time to < 60 min for all the studied PAHs with logK(ow) up to 5.74. Moreover, the porous coordination polymers property of the MOFs makes the proposed nd-MSPE based on the partitioning of PAHs and thus excludes the competitive adsorption of coexisting substances. The developed nd-MSPE approach provides low detection limits (0.08 -0.82 ng L-1), wide linear range (1-1000 ng L-1) and high precision (relative standard deviations (RSDs) (3.3-4.8%) in determining C-free of PAHs. The measured C-free of PAHs in environmental waters are in good agreement with that of verified method. Given the large diversity in structure and pore size of MOFs, various magnetic MOFs can be fabricated for task-specific nd-MSPE of analytes, presenting a prospective strategy for high-efficiency measuring C-free of contaminants in environments. (C) 2019 Elsevier Ltd. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/42559]
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
作者单位	1.Chinese Acad Sci, Ecoenvironm Sci Res Ctr, State Key Lab Environm Chem & Ecotoxicol, POB 2871, Beijing 100085, Peoples R China 2.Henan Polytech Univ, Coll Chem & Chem Engn, Jiaozuo 454000, Henan, Peoples R China
推荐引用方式 GB/T 7714	Li, Yingjie,Zhou, Xiaoxia,Dong, Lijie,et al. Magnetic metal-organic frameworks nanocomposites for negligible-depletion solid-phase extraction of freely dissolved polyaromatic hydrocarbons[J]. ENVIRONMENTAL POLLUTION,2019,252:1574-1581.
APA	Li, Yingjie.,Zhou, Xiaoxia.,Dong, Lijie.,Lai, Yujian.,Li, Shasha.,...&Liu, Jingfu.(2019).Magnetic metal-organic frameworks nanocomposites for negligible-depletion solid-phase extraction of freely dissolved polyaromatic hydrocarbons.ENVIRONMENTAL POLLUTION,252,1574-1581.
MLA	Li, Yingjie,et al."Magnetic metal-organic frameworks nanocomposites for negligible-depletion solid-phase extraction of freely dissolved polyaromatic hydrocarbons".ENVIRONMENTAL POLLUTION 252(2019):1574-1581.