Assessing desorption resistance of PAHs in dissolved humic substances by membrane-based passive samplers

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	Assessing desorption resistance of PAHs in dissolved humic substances by membrane-based passive samplers
	Chen, Shan ; Xu, Yiping ; Wang, Zijian
刊名	JOURNAL OF COLLOID AND INTERFACE SCIENCE
	2010-10-01
卷号	350 期号:1 页码:348-354
关键词	Dissolved humic substances Polycyclic aromatic hydrocarbons Sorption and desorption reversibility Freely dissolved concentration
中文摘要	Binding of hydrophobic organic compounds (HOCs) to humic substances (HS) has significant influence on their fate and bioavailability in an aquatic environment, yet very little is known on the desorption behavior of HOCs in dissolved HS. In this study, triolein-embedded cellulose acetate membranes (TECAMs) were used as passive samplers in dissolved HS-containing solutions to extract the free polycyclic aromatic hydrocarbons (PAHs). The partitioning coefficients (K-OC) of PAHs in dissolved HS from different sources were determined. Then the rapidly desorbable fractions (f(rd)) of HOCs in dissolved HS were quantified by a quasi-equilibrium model. Results show that the magnitude of K-OC of PAHs correlated strongly with the O/C atomic ratio and molecular weight of HS. The PAHs with lower K-OW values desorbed almost reversibly from an aquatic fulvic acid, a sediment humic acid (HA), a lignite HA, and Aldrich HA. However, for strongly hydrophobic chrysene binding to the lignite HA, some extent of desorption resistance was found and attributed to sorption hysteresis as well as steric hindrance. The present study illustrated that the quality of HS and the property of solute may play key roles in determining the desorption reversibility. (C) 2010 Elsevier Inc. All rights reserved.
WOS记录号	WOS:000281048300049
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/21208]
专题	生态环境研究中心_环境水质学国家重点实验室
推荐引用方式 GB/T 7714	Chen, Shan,Xu, Yiping,Wang, Zijian. Assessing desorption resistance of PAHs in dissolved humic substances by membrane-based passive samplers[J]. JOURNAL OF COLLOID AND INTERFACE SCIENCE,2010,350(1):348-354.
APA	Chen, Shan,Xu, Yiping,&Wang, Zijian.(2010).Assessing desorption resistance of PAHs in dissolved humic substances by membrane-based passive samplers.JOURNAL OF COLLOID AND INTERFACE SCIENCE,350(1),348-354.
MLA	Chen, Shan,et al."Assessing desorption resistance of PAHs in dissolved humic substances by membrane-based passive samplers".JOURNAL OF COLLOID AND INTERFACE SCIENCE 350.1(2010):348-354.