哥本哈根城市土壤中镉、铜和铅的释放。
Release of cadmium, copper and lead from urban soils of Copenhagen.
机构信息
Department of Plant and Environmental Sciences, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Faculty of Science, University of Copenhagen, Denmark; Institute of Agricultural Environment and Resource, Shanxi Academy Agricultural Sciences, Taiyuan 030006, China.
Department of Plant and Environmental Sciences, Thorvaldsensvej 40, DK-1871 Frederiksberg C, Faculty of Science, University of Copenhagen, Denmark.
出版信息
Environ Pollut. 2014 Apr;187:90-7. doi: 10.1016/j.envpol.2013.12.016. Epub 2014 Jan 22.
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(NO3)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 leachable Cu and Pb pools were higher in urban soils compared the agricultural reference soil but not for Cd.
我们研究了哥本哈根老城区不同土壤中 Cd、Cu 和 Pb 的结合和释放动力学。与农业参考土壤相比，城市土壤中的总 Cd、Cu 和 Pb 浓度分别升高了 5-27 倍，Cd 和 Pb 主要处于可移动的库中，Cu 则主要处于强结合的库中。这些土壤在 Ca(NO3)2 或 HNO3 溶液中进行了加速淋滤研究，导致在 15 周的时间内，Cd、Cu 和 Pb 土壤浓度的总释放量分别高达 78%、18%和 15%。当 pH 值分别降低 2 和 3 个单位时，相对初始 Cd 和 Pb 释放速率分别增加了 10 倍，而仅在 pH 值低于 4 时才会看到 Cu 释放速率的增加。与农业参考土壤相比，城市土壤中总可提取的 Cu 和 Pb 库较高，但 Cd 则不然。
Zotero 插件