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With the rapid growth of the global population , industrial production continues to expand the scale of the rapid development and urbanization , a large number of heavy metals in waste containing various substances into the soil and cause the metals accumulated in the soil , soil heavy metal pollution has receiving more and more attention. From the 1970s began , the researchers found that many heavy metals in soil biological activity and environmental behavior is not only related to its total , to a greater extent by the presence of heavy metals in the environment, the chemical form of the decision. Mobility of heavy metals in soil , bioavailability and toxicity are all related to the presence of heavy metals in the soil morphology related . Therefore, the study of heavy metals present in the soil morphology and distribution for the understanding of the bioavailability of heavy metals , migration patterns and the role of biological poison has very important significance. In this paper, three kinds of soil types Jinan surrounding areas ( soil, cinnamon , brown ) of the surface soil (0-20cm) for the study, collected a total of three types of soil sampling points 11 soil samples . This experiment uses BCR sequential extraction of soil samples for the presence of different forms of extraction of heavy metals been measured Cd, Co, Cu, Mn, Ni, Pb, Zn, As and Cr elements at each sampling point of acetic acid extractable can restore extractable , oxidizable and residual extract four forms of content such as effects of different heavy metals pollution sources and distribution characteristics of the soil and surrounding areas Jinan conducted a preliminary evaluation of heavy metal pollution . The results showed that: different types of soil heavy metals Cd, Co, Cu, Mn, Ni, Pb, Zn, As , Cr and other elements of various forms of distribution ratio vary greatly, but are residual fraction ; various heavy metals the three soil types ( soil, cinnamon , brown ) in the content and form of distribution is consistent : the activity of heavy metals in descending order of the proportion of state : elements Mn gt; Zn gt; Pb gt; Co gt; Cu gt; Cd gt; Ni gt; Cr gt; As; Jinan surrounding area has been varying degrees of soil contamination by heavy metals , heavy metals cd, Ni, Pb, Zn, As , etc. at each sampling point soil samples the pollution is more serious , in which elements of the cd and As pollution have reached the heavy pollution level .
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