Quantification of Pollutant Lead in Forest Soils
Quantification of Pollutant Lead in Forest Soils
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DOI：
10.2136/sssaj2004.0095
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发表时间：
2005-09
影响因子：
2.9
通讯作者：
E. Steinnes;T. E. Sjøbakk;Carmen Donisa;M. Brännvall
中科院分区：
文献类型：
--
作者：
E. Steinnes;T. E. Sjøbakk;Carmen Donisa;M. Brännvall
对挪威15种不同大气沉降速率的灰化林土壤进行了铅含量测定。研究人员对来自Of、Oh、E、B和C层的样品进行了研究。采用扇形场电感耦合等离子体质谱法（ICP-MS）测定了铅的硝酸可溶性含量和稳定同位素比值。基于对挪威不同时期大气沉降中2 0 6 Pb/ 2 0 7 Pb比值的现有知识，假设C层不受干扰，计算了不同样品和土壤层中空气污染提供的Pb百分比。超过90%的O层铅来自污染，即使在遥远的北方偏远地区也是如此。大部分站点的E层和B层的铅也有显著的污染来源。在南方，超过一半来自空气污染的铅现在已经转移到上层矿物层。稳定的铅同位素比值是揭示陆地生态系统中铅污染的一个非常有效的工具。目前的工作表明，应在世界其他地区进行类似的研究，以客观地评估人为对地表土壤铅的贡献。
Fifteen podzolic forest soils in Norway covering sites with a wide range of atmospheric deposition rates were assayed for their contents of pollutant Pb. Samples from the Of, Oh, E, B, and C horizons were studied. Nitricadd soluble contents of Pb and the corresponding stable Pb isotope ratios were determined by sector field inductively coupled plasma-mass spectrometry (ICP-MS). On the basis of existing knowledge on 2 0 6 Pb/ 2 0 7 Pb ratios in atmospheric deposition over Norway across time, the percentage of the Pb supplied by air pollution was calculated for the various samples and soil horizons, assuming that the C horizon was undisturbed. More than 90% of O horizon Pb was from pollution, even at remote sites in the far north. Significant fractions of Pb were pollution-derived also in the E and B horizons at most sites. In the south, more than half of the Pb derived from air pollution has now moved to the upper mineral horizons. Stable Pb isotope ratios are a very predse tool for revealing Pb pollution in terrestrial ecosystems. The present work suggests that similar studies should be done in other parts of the world to objectively assess the anthropogenic contribution to surface soil Pb.