Department of Ecophysiology, Institute of Forestry and Rural Engineering, Estonian University of Life Sciences, Viljandi mnt 18B, 11216, Tallinn, Estonia.
Environ Monit Assess. 2012 Jul;184(7):4105-17. doi: 10.1007/s10661-011-2247-8. Epub 2011 Jul 30.
The concentration of heavy metals in soil and in Scots pine (Pinus sylvestris) organs growing on a pH gradient from 4.0 to 7.9 of soil at different distances from a cement plant was monitored. Emission for over 40 years of alkaline dust (pH 12.3-12.6) into the atmosphere in North Estonia had resulted in alkalisation and elevated concentration of total heavy metals in upper layers of the soil (0-30 cm), which was considerable even 10 years after the dust pollution stopped. Monitoring showed that the accumulation and allocation of heavy metals varied between the stem, shoots and needles and differed from the trees in the unpolluted area, depending more on the mobility of elements and the pH than element concentrations in the alkaline soil. A strong negative correlation was found between the soil pH and Mn, Zn and Cd concentrations in different tree organs. Compared to the unpolluted area, Pb was present in relatively higher concentrations in all organs but Cr, Fe and Cu in needles and shoots. The concentrations of Mn and Cd were much lower than control in all organs of trees in alkalised soil. The height increment and density of needles on shoots were predominantly in negative correlation with the pH of soil.
监测了在距离水泥厂不同距离处、土壤 pH 值从 4.0 到 7.9 的梯度上生长的土壤和欧洲赤松（Pinus sylvestris）器官中重金属的浓度。在爱沙尼亚北部，碱性粉尘（pH 值为 12.3-12.6）排放到大气中已有 40 多年，导致土壤上层（0-30 厘米）的土壤碱化和总重金属浓度升高，即使在粉尘污染停止 10 年后，这种情况仍很严重。监测表明，重金属的积累和分配在茎、枝条和针叶之间存在差异，与未受污染地区的树木不同，这主要取决于元素的迁移率和土壤的 pH 值，而不是碱性土壤中元素的浓度。发现不同树木器官中的土壤 pH 值与 Mn、Zn 和 Cd 浓度之间存在强烈的负相关关系。与未受污染地区相比，所有器官中的 Pb 浓度相对较高，但 Cr、Fe 和 Cu 仅在针叶和枝条中。在碱化土壤中，所有树木器官中的 Mn 和 Cd 浓度均明显低于对照。枝条上针叶的高度增量和密度与土壤 pH 值呈负相关。
