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	Delivery of vegetable oil suspensions in a shear thinning fluid for enhanced bioremediation
	Zhong L.; Truex, M. J.; Kananizadeh, N.; Li, Y.; Lea, A. S.; Yan, X.
	2015
关键词	Subsurface delivery Vegetable oil Shear thinning fluid Bioremediation Amendment zero-valent iron remedial amendment delivery low permeable zones porous-media xanthan gum edible oil model development stable emulsions anaerobic bioremediation contaminated soils
英文摘要	In situ anaerobic biological processes are widely applied for dechlorination of chlorinated solvents in groundwater. A wide range of organic substrates have been tested and applied to support the dechlorination processes. Vegetable oils are a promising type of substrate and have been shown to induce effective dechlorination, have limited geochemical impacts, and maintain good longevity. Because they are non-aqueous phase liquids, distribution of vegetable oils in the subsurface has typically been approached by creating emulsified oil solutions for injection into the aquifer. In this study, inexpensive waste vegetable oils were suspended in a shear-thinning xanthan gum solution as an alternative approach for delivery of vegetable oil to the subsurface. The stability, oil droplet size distribution, and rheological behavior of the oil suspensions that are created in the xanthan solutions were studied in batch experiments. The injectability of the suspensions and the oil distribution in a porous medium were evaluated in column tests. Numerical modeling of oil droplet transport and distribution in porous media was conducted to help interpret the column-test data. Batch studies showed that simple mixing of vegetable oil with xanthan solution produced stable suspensions of the oil as micron-size droplets. The mixture rheology retains shear-thinning properties that facilitate improved uniformity of substrate distribution in heterogeneous aquifers, Column tests demonstrated successful injection of the vegetable oil suspension into a porous medium. This study provides evidence that vegetable oil suspensions in xanthan gum solutions have favorable injection properties and area potential substrate for in situ anaerobic bioremediation. Published by Elsevier B.V.
出处	Journal of Contaminant Hydrology
卷	175
页	17-25
收录类别	SCI
语种	英语
ISSN号	0169-7722
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/39081]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Zhong L.,Truex, M. J.,Kananizadeh, N.,et al. Delivery of vegetable oil suspensions in a shear thinning fluid for enhanced bioremediation. 2015.

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