[Assessment and correlation analysis of heavy metals pollution in soil of Dajinshan Island].

ABSTRACT

The Dajinshan Island is the highest altitude point in the nature land of Shanghai. In order to find out the status of soil heavy metals pollution of the Dajinshan Island and its correlation, this paper used the methods of grid and serpents sampling to collect samples, and applied the single factor pollution index method and potential ecological harm index method to assess the pollutions status. The results showed that the main contributor of soil heavy metal pollution in Dajinshan Island was Cd, with an over-standard rate of 85.4%, followed by Pb, with an over-standard rate of 26.8%, whereas Zn and Cu were not excessive. In addition, there was significant positive correlation between Pb-Cu, Pb-Zn and Cu-Zn at the level of P = 0.05, suggesting that they had high homology and were easily influenced by the soil forming materials. This was an indirect evidence that the Dajinshan Island was well protected and not much affected by human activities.