Distribution characteristics and chemical pattern of cadmium in grasses planted in the cadmium contaminated soil

In this paper,the distribution and chemical pattern of Cd in the grasses planted in Cd contaminated soil in western suburb of Shenyang were analyzed.The results showed that Cd was mainly distributed in the grass roots,and characteristics of Cd distribution in various grasses were different.Some grasses had resisting ability against Cd,some had strong capability of bio-accumulation for Cd.Results of different grasses extracted by different solvents showed that acid-soluble Cd in grasses was about 63.3% of total,and water-soluble and organic Cd were little,accounting for 0 7% and 0 4% of total respectively.Acid-soluble Cd was more active than the others during the transformation in the soil-plant system,while water-soluble Cd had certain regularity with the change of time and temperature,and organic Cd became more active with the increase of solvent polarity.