Concentration and Evaluation on Pollution of Pd,Cd,Cu and Zn in Vegetable Farm soil and Vegetable of Kunming

The paper discussed the pollution of Pb, Cd, Cu and Zn in vegetable-farm soil and vegetable through field investigation method. The results showed that: Using pollution index methods, the single factor pollution of Pb, Zn in soil is low-degree, and Cd, Cu is middle-degree. The comprehensive pollution degree is middle. According to national standard values of food in China, there are some samples Pb, Cd, Cu and Zn concentration in food part of vegetable were over standard values respectively. But the ratio of over standard values of Pb concentration is highest. The Pb pollution in vegetable may come from the automobile gas along road.