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首页> 外文期刊>The Science of the Total Environment >The history of mercury pollution near the Spolana chlor-alkali plant (Neratovice, Czech Republic) as recorded by Scots pine tree rings and other bioindicators
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The history of mercury pollution near the Spolana chlor-alkali plant (Neratovice, Czech Republic) as recorded by Scots pine tree rings and other bioindicators

机译：Scots松树年轮和其他生物指示剂记录的Spolana氯碱厂（捷克共和国纳拉托维斯）附近的汞污染历史

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摘要

We assessed ＞ 100 years of mercury (Hg) pollution recorded in the tree rings of Scots Pine near a Czech chlor-alkali plant operating since 1941. Hg concentrations in tree rings increased with the launching of plant operations and decreased when Hg emissions decreased in 1975 due to an upgrade in production technology. Similar to traditional bioindicators of pollution such as pine needles, bark and forest floor humus, Hg concentrations in Scots Pine boles decreased with distance from the plant Mean Hg in pine bole in the 1940s ranged from 32.5 μg/kg Hg at a distance of 0.5 km from the plant to 5.4 μg/kg at a distance of ＞4.7 km, where tree ring Hg was the same as at a reference site, and other bioindicators also suggest that the effect of the plant was no longer discernible. Tree ring Hg concentrations decreased by 8-29 μg/kg since the 1940s at all study sites including the reference site. The lack of exact correspondence between changes at the plant and tree ring Hg indicated some smearing of the signal due to lateral translocation of Hg from sapwood to heartwood. Bole Hg concentrations reflected local and regional atmospheric Hg concentrations, and not Hg wet deposition.
机译：我们评估了>自1941年开始运营的捷克氯碱工厂附近的苏格兰松树年轮中记录的100年汞（Hg）污染。树环中的汞浓度随着工厂运营的开始而增加，并随着1975年汞排放量的减少而降低由于生产技术的升级。与传统的污染指示剂（例如松针，树皮和森林腐殖质）类似，苏格兰松树中的汞含量随着距植物的距离而降低，1940年代松树中的汞平均含量为0.5千米处的32.5μg/ kg汞。在大于4.7 km的距离上从植物到5.4μg/ kg，其中树木年轮的Hg与参考位点处的Hg相同，其他生物指示剂也表明该植物的作用不再明显。自1940年代以来，所有研究地点（包括参考地点）的年轮汞浓度均降低了8-29μg/ kg。由于汞从边材到心材的横向移位，在植物和树环上的汞变化之间缺乏确切的对应关系表明信号有些模糊。硼的汞浓度反映的是本地和区域大气中的汞浓度，而不是汞的湿沉降。

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