Formation of soil macropores and preferential migration of linear alkylbenzene sulfonate (LAS) in soils

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	Formation of soil macropores and preferential migration of linear alkylbenzene sulfonate (LAS) in soils
	Ou, ZQ; Jia, LQ; Jin, HY; Yediler, A; Jiang, X; Kettrup, A; Sun, TH; Ou, ZQ, Acad Sinica, Inst Appl Ecol, POB 417, Shenyang 110015, Peoples R China
刊名	CHEMOSPHERE
	1999
卷号	38 期号:9 页码:1985-1996
关键词	Macropores Preferential Flow Preferential Migration Surfactants Detergent Las
ISSN号	0045-6535
英文摘要	Effects of freeze-thaw and wet-dry cycles on the formation of soil macropores and preferential flow under simulative conditions in the laboratory, and preferential migration of linear alkylbenzene sulfonate (LAS) in paddy and soybean soils in field lysimeters were studied. Results showed that both freeze-thaw and wet-dry cycles could cause macropores and preferential flow in soils and that the former was stronger than the latter. The preferential breakthrough of LAS through 1.5 m soil monolith was 23 days for both paddy and soybean soils. However, their leachate volumes at preferential breakthrough were much different, i.e. 69 mm for paddy soil and only 9 mm for soybean soil. The leachate volumes at equilibrium governed by soil adsorption/desorption processes were very similar for soils cropped to paddy rice (185 mm) and soybean (178 mm) though their breakthrough times were much different, i.e. 44 days for the former and 58 days for the latter. The preferential breakthrough of LAS was 21 and 35 days ahead of equilibrium breakthrough for paddy and soybean soils, respectively. The peak LAS concentrations resulted from preferential breakthrough accounted for 20-30% of those at equilibrium in soybean soil. This ratio was as high as 30-86% in paddy soil. Preferential migration of LAS could not be observed in repacked soil monolith without macropores. (C) 1999 Elsevier Science Ltd. All rights reserved.
学科主题	Environmental Sciences
语种	英语
WOS记录号	WOS:000078982700003
公开日期	2011-09-23
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/55621]
专题	沈阳应用生态研究所_沈阳应用生态研究所
通讯作者	Ou, ZQ, Acad Sinica, Inst Appl Ecol, POB 417, Shenyang 110015, Peoples R China
推荐引用方式 GB/T 7714	Ou, ZQ,Jia, LQ,Jin, HY,et al. Formation of soil macropores and preferential migration of linear alkylbenzene sulfonate (LAS) in soils[J]. CHEMOSPHERE,1999,38(9):1985-1996.
APA	Ou, ZQ.,Jia, LQ.,Jin, HY.,Yediler, A.,Jiang, X.,...&Ou, ZQ, Acad Sinica, Inst Appl Ecol, POB 417, Shenyang 110015, Peoples R China.(1999).Formation of soil macropores and preferential migration of linear alkylbenzene sulfonate (LAS) in soils.CHEMOSPHERE,38(9),1985-1996.
MLA	Ou, ZQ,et al."Formation of soil macropores and preferential migration of linear alkylbenzene sulfonate (LAS) in soils".CHEMOSPHERE 38.9(1999):1985-1996.