鲁北小清河流域土壤中元素分布特征及环境质量评价

对鲁北小清河流域表层和深层土壤样品进行系统采集，分析土壤中元素全量和有效态含量，利用地球化学方法研究元素在土壤中的丰缺和分布规律，认为Se、Pb、Hg在表层土壤中明显富集，与地表污染有关。通过对表层土壤中元素有效态含量和重金属全量的研究，对区内土壤质量和土壤环境质量进行评价，结果表明区内土壤中除Mo、B、Mn出现大面积缺量区外，其他元素均在适量区以上，土壤质量良好，营养水平较高；单元素土壤环境质量除Cr、Hg、cd出现小范围的严重污染区外，其他元素未出现严重污染区，土壤环境质量较好，但多因子综合环境质量评价起始污染以上的面积已接近70％，应予以重视。

Distribution characteristics of elements in soils and environment quality evaluation in the Xiaoqing River valley, northern Shandong.

The authors systematically collected surface and deep soil samples from the Xiaoqing River drainage area, northern Shandong, analyzed the total contents and effective contents of elements in both kinds of sample and studied the abundance and deficiency of the elements in soils and their distribution characteristics using the geochemical method. According to the results of the studies, they come to a conclusion that Se, Pb and Hg are markedly enriched in surface soils, which is possibly due to surface pollution. Soil quality and soil environmental quality evaluations in the area based on a study of the total contents and effective contents of the elements (including heavy metal elements) in surface soil samples indicate that Mo, B and Mn are deficient over some large areas while the contents of other elements are higher than moderate in the study area, so the soil is rather nutritious; except that soils in some small areas are seriously polluted with Cr, Hg and Cd, there are no other areas polluted seriously with other elements, so the overall quality of the soil environment in the study area is rather good. However, the multi-factor environment quality evaluation reports that nearly 70% of the area has been subjected to initial pollution, to which we should pay more attention.