Abstract:

In order to study the heavy metal pollution situation in a Hunan industrial and mining area, the regional soil and leafy vegetable samples were collected, and the Cd, Pb, Zn, Cu heavy metal element contents were analyzed. The results showed that, Cd, Pb, Zn pollution was serious in the soil, the contents were far higher than soil environment quality standard (GB15618-1995), Cu content did not reach the basic pollution level. For different parts of the composite pollution index of rape and cabbage, from high to low order was: cabbage root > cabbage leaves > rape leaves > cabbage stems > rape roots > rape stems, and the enrichment ability of rape and cabbage of each part from large to small was: cabbage leaves > cabbage stems > rape stems > rape leaves > rape roots > cabbage roots, which showed that in the region, heavy metal pollution in the leafy vegetables came not only from the soil but also from smelting waste gases. It was suggested that, when treating smelting wastewater, the waste gas treatment of smelting enterprises should be emphasized as well, so as to achieve better effects on pollution prevention and control.