文献类型： 外文期刊
作者： Li, Lijun 1 ; Holm, Peter E. 1 ; Marcussen, Helle 1 ; Hansen, Hans Christian Bruun 1 ;
作者机构： 1.Univ Copenhagen, Dept Plant & Environm Sci, Fac Sci, DK-1871 Frederiksberg C, Denmark
2.Shanxi Acad Agr Sci, Inst Agr Environm & Resource, Taiyuan 030006, Peoples R China
关键词： Heavy metal extraction;Leaching;Release rates;Urban soil
期刊名称：ENVIRONMENTAL POLLUTION （ 影响因子：8.071； 五年影响因子：8.35 ）
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收录情况： SCI
摘要： We studied the bonding and release kinetics of Cd, Cu and Pb from different soils in the older metropolitan area of Copenhagen. Total Cd, Cu and Pb concentrations were elevated 5-27 times in the urban soils compared to an agricultural reference soil, with Cd and Pb in mainly mobilisable pools and Cu in strongly bound pools. The soils were subjected to accelerated leaching studies in Ca(NO_3)_2 or HNO3 solutions resulting in release up to 78,18 and 15% of total Cd, Cu and Pb soil concentrations over a period of 15 weeks. The relative initial Cd and Pb release rates increased 10 fold when pH decreased 2 and 3 units, respectively, while increases in Cu release rates were only seen at pH below 4. The total teachable Cu and Pb pools were higher in urban soils compared the agricultural reference soil but not for Cd.
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