Distribution And Causes Of Heavy Metal Elements In Qingdao

As social and economic development, human emissions large amounts of harmful heavy metals into the soil in the production process, making the soil structure and function deterioration, decline in the quality and direct harm to human health and development. In response to this phenomenon, Distribution of heavy metal elements (Cd,Hg,Pb,As,Cr) and the causes of origin in Qingdao were analyzed, on the prevention of soil and environmental degradation have important theoretical and practical significance.According to the foundation of Qingdao eco-geochemical data, the use of GIS mapping and spatial analysis we map out the geochemical map of Qingdao to analyze the distribution of elements in the region of space. It can be seen from the distribution of heavy metals vary. Cd,Hg,Pb content of these three elements in the overall spatial distribution are more evenly, but abnormal areas and urban distribution are more consistent with intensive areas of human life. The distribution of high value of As in the overall is broadband-like region form the north east to southwest, and in the LaiXi City JiuDian-ZhuGou I wish ditch area along the extreme form.Cr content of this type of spatial distribution of elements in the middle was high and low around the trend.Characteristics of soil elements through the combination of analysis, factor analysis, atmospheric dust and soil elemental correlation analysis, analysis of profile characteristics we get the conclusions as follows:(1)Soil Cd, Pb, As, Cr distribution of the four elements of the geological background, terrain closer relationship, indicating that its distribution mainly to natural causes; As distribution of elements in the Cretaceous sedimentary rocks in the high content of soil, Cr Central element in Qingdao distribution Daguhe Quaternary sediments with high content area.(2)Qingdao soil subjected to varying degrees the five elements of human factors, human activities influence the distribution of Hg significantly on the Cd, Pb obviously influence the distribution of As, Cr distribution is relatively weak.