Superville Pierre-Jean, de Winter Niels, Phung Anh Tuan, Proix Nicolas, Baeyens Willy, Gao Yue
Department of Analytical, Environmental and Geochemistry (AMGC), VUB, Pleinlaan 2, 1050 Brussels, Belgium.
INRA, Laboratoire d'analyses des sols d'Arras, 62000 Arras, France.
Chemosphere. 2017 Apr;172:80-88. doi: 10.1016/j.chemosphere.2016.12.142. Epub 2016 Dec 31.
The soil around Metaleurop, a big smelter, is heavily contaminated by Zn, Pb, Cd and Cu. In order to compare the impact of different soil amendments on the metal availability to trees, the polluted soil section was divided in a reference parcel and two others with either sulfo-calcic or silico-aluminous ash amendments. Five different tree species were planted on the parcels and the uptake of heavy metals in these trees was studied. Total and labile metal fractions were assessed in each of the 3 parcels. The mobility and assimilation of the metals was highest in the non-amended, reference soil parcel which had the lowest pH, organic matter and carbonate content. In all soils, pH decreased while organic matter content and mobility of the metals increased over time. Highest bulk concentrations of trace metals were found in white willow trees (Salix alba L.). Laser ablation-ICPMS was used to study changes in metal accumulation over a period of 10 years after planting the trees. The radial metal profiles in the trunk core samples varied between elements and tree species, however, in all willow trees the radial Cd and Zn profiles were significantly correlated. Radial pollutant concentration patterns are discussed in terms of seasonal effects, health status, tree species and metal mobility in the soil. For Cd and Zn, the profiles were influenced by their mobility in the soils. In general, periodical patterns were observed for Pb. Cu concentration profiles were decreasing over time, with the strongest decrease in the initial growth period.
大型冶炼厂梅塔洛尤罗普周边的土壤受到锌、铅、镉和铜的严重污染。为了比较不同土壤改良剂对树木吸收金属的影响，将受污染的土壤区域划分为一个对照地块和另外两个分别添加了硫钙灰或硅铝灰改良剂的地块。在这些地块上种植了五种不同的树种，并研究了这些树木对重金属的吸收情况。对三个地块中的每一个地块的总金属和不稳定金属部分进行了评估。在pH值最低、有机质和碳酸盐含量最低的未改良对照土壤地块中，金属的迁移性和同化性最高。在所有土壤中，随着时间的推移，pH值下降，而有机质含量和金属迁移性增加。在白柳树（Salix alba L.）中发现了最高的痕量金属总体浓度。使用激光烧蚀电感耦合等离子体质谱仪研究了树木种植后10年内金属积累的变化。树干芯样中的径向金属分布在元素和树种之间有所不同，然而，在所有柳树中，径向镉和锌分布显著相关。根据季节效应、健康状况、树种和土壤中金属迁移性讨论了径向污染物浓度模式。对于镉和锌，其分布受它们在土壤中的迁移性影响。一般来说，观察到铅有周期性模式。铜浓度分布随时间下降，在初始生长阶段下降最为明显。
