Contamination of urban soils in an area of Northern France polluted by dust emissions of two smelters
Contamination of urban soils in an area of Northern France polluted by dust emissions of two smelters
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DOI：
10.1007/s11270-007-9541-7
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发表时间：
2008-02-01
影响因子：
2.9
通讯作者：
Waterlot, Christophe
中科院分区：
文献类型：
--
作者：
Douay, Francis;Pruvot, Christelle;Waterlot, Christophe
对法国北部两家铅锌冶炼厂（Metaleurop Nord 和 Umicore）周围 27 个城市表土的污染情况进行了评估。分析了 18 种微量元素（Ag、As、Bi、Cd、Co、Cr、Cu、Hg、In、Ni、Pb、Sb、Se、Sn、Tl、Th、U 和 Zn）。调查包括研究作为污染指标的镉、铅和锌的垂直分布。结果表明，Cd、In、Pb、Sb 和 Zn 是主要污染物，其次是 Ag、Bi、Cu 和 Hg。此外，砷、镍、硒、锡和铊的含量略高于地区农业价值。其他元素（Co、Cr、Th 和 U）处于内源水平。观测结果强调了城市土壤理化参数的强烈异质性以及下层土壤存在重度镉、铅和锌污染。不排除金属（特别是镉和锌）从表层土壤向深层转移的可能性。事实上，土壤返工并不是解释所研究土壤深层污染程度的唯一因素。对城市土壤中所研究的元素浓度与附近当地农业值的比较表明，Metaleurop 和 Umicore 冶炼厂产生的粉尘排放并不是唯一的污染源。因此，所研究的城市土壤受到锑和铟的大量污染可以用家庭燃烧煤炭取暖来解释。
The contamination of 27 urban topsoils has been assessed around two lead and zinc smelters (Metaleurop Nord and Umicore) in the North of France. Eighteen trace elements have been analysed (Ag, As, Bi, Cd, Co, Cr, Cu, Hg, In, Ni, Pb, Sb, Se, Sn, Tl, Th, U and Zn). The investigation included the study of the vertical distribution of Cd, Pb and Zn as indicators of pollution. It was shown that Cd, In, Pb, Sb and Zn were major pollutants followed in lesser quantities by Ag, Bi, Cu and Hg. In addition, As, Ni, Se, Sn and Tl were present at levels slightly higher than regional agricultural values. The other elements (Co, Cr, Th and U) were at endogenous levels. The observations have highlighted the strong heterogeneity of the physico-chemical parameters of urban soils and the existence of heavy contamination of the under layers by Cd, Pb and Zn. A potential transfer of metals from the topsoil to the deeper layers and especially Cd and Zn, is not excluded. Indeed the soil rework is not the only factor explaining contamination level of the deeper layers of the studied soils. The comparison of the studied element concentrations in urban soils with nearby local agricultural values shows that the dust emission originating from the Metaleurop and Umicore smelters were not the only source of contamination. Thus a large contamination of the studied urban soils by Sb and In could be explained by domestic combustion of coal for heating.