Abstract:

Accumulations of Zn,Cu,Pb and Cd by 20 kinds of greenland plants were studied in typical industrial areas of Shanghai by field investigation in the view of current lack of research on plant accumulation of heavy metals.It was found that the soil of the area studied was seriously contaminated by heavy metals,the average concentration of Zn,Cu,Pb,Cd was about 12,5,20and 62 times of the value of environmental background in Shanghai,respectively.The results also indicated that the greeland plants growing there had different ability in metal accumulation.Rhododeoron simsii showed the highest ability in Zn accumulation,with Zn concentrations in leaves and stems being 576 and 9 375 mg/kg,respectively.Digitaria sanguinalis (L.) had high ability in Cu and Cd accumulation.These kinds of plants can be used as the choices of industrial areas plant rehabilitation of heavy metal pollution,and have the great value of further study