Solubilization and desorption of methyl-parathion from porous media: A comparison of hydroxypropyl-beta-cyclodextrin and two nonionic surfactants

CORC > 生态环境研究中心 > 中国科学院生态环境研究中心 > 环境水质学国家重点实验室

	Solubilization and desorption of methyl-parathion from porous media: A comparison of hydroxypropyl-beta-cyclodextrin and two nonionic surfactants
	Zeng, QR; Tang, HX; Liao, BH; Zhong, TF; Tang, C
刊名	WATER RESEARCH
	2006
卷号	40 期号:7 页码:1351-1358
关键词	HOCs surfactants HPCD soil washing
英文摘要	The removal of hydrophobic organic compounds (HOCs) from soils and sediments by water flushing is often constrained by sorption interactions. The development of improved methods for remediation of contaminated soils has emerged as a significant environmental priority. Increasing HOCs desorption and mobility in soil using surfactants is considered to be one of the most suitable on-site techniques for soil remediation. A major concern regarding the use of surfactants for environmental restoration is the potential loss to the environment of large amounts of surfactant through sorption of nonionic types. A study was conducted to investigate whether surfactants and cyclodextrins can be used to enhance the transport of methyl-parathion in a contaminated soil. At aqueous concentrations of surfactants tested, the proportion of each surfactant sorbed to the soil increased with increasing surfactant concentrations. The maximal adsorbed mass is about 5130 and 14,200 mu g/g for Brij 35 and Tween 80, respectively in the case of nonionic surfactants, sorption attenuates surfactant effectiveness by increasing the organic carbon content of the soil matrix and retarding transport of methyl-parathion through batch and soil column experiments. However, in contrast with the surfactants, hydroxypropyl-beta-cyclodextrin (HPCD) does not interact with the soil tested. The nonreactive nature of cyclodextrins, combined with its large affinity for HOCs suggests that it should have an advantage versus adsorbing surfactants for decreasing HOC distribution coefficients in subsurface systems. (c) 2006 Elsevier Ltd. All rights reserved.
WOS记录号	WOS:000236840800003
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/23030]
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	Zeng, QR,Tang, HX,Liao, BH,et al. Solubilization and desorption of methyl-parathion from porous media: A comparison of hydroxypropyl-beta-cyclodextrin and two nonionic surfactants[J]. WATER RESEARCH,2006,40(7):1351-1358.
APA	Zeng, QR,Tang, HX,Liao, BH,Zhong, TF,&Tang, C.(2006).Solubilization and desorption of methyl-parathion from porous media: A comparison of hydroxypropyl-beta-cyclodextrin and two nonionic surfactants.WATER RESEARCH,40(7),1351-1358.
MLA	Zeng, QR,et al."Solubilization and desorption of methyl-parathion from porous media: A comparison of hydroxypropyl-beta-cyclodextrin and two nonionic surfactants".WATER RESEARCH 40.7(2006):1351-1358.