水体重金属污染的植物修复研究(Ⅲ)——种苗过滤去除水中重金属镉

Research of Phytoremediation for Heavy Metal Pollution in WaterⅢ.---The Blastofiltration of Cd from Water

采用室内培养及仪器分析测试方法,研究了3种作物种苗对水体中镉的去除作用。分析表明,在所选择的实验条件下,采用种苗过滤能够在72h内使水体中镉浓度明显降低。在蓖麻、向日葵、玉米等植物幼苗的根中分别积累了1425μg·g-1、696μg·g-1和164μg·g-1的镉,其茎叶中镉的积累也分别达到了70.5μg·g-1、114μg·g-1和83.4μg·g-1。还对不同镉浓度下的实验结果进行了对比和讨论,提出选择一些传统作物种苗进行环境水体中镉污染的植物修复具有良好的应用前景。

In this article,three kinds of crop seedlings were studied for removing of Cd fromwater wi th blastofiltration method.At the selected experiment conditions,an alysis results showed that in 72hour s,the concentration of Cd decreased obviously.In the dry roots of castor -oil plant,sunflowe r and maize,Cd was accumulated to 1425μg·g -1 ,696μg·g -1 and 164μg·g -1 ,respec-tively,and in stems and leaves of these 3seed lings ,Cd was accumulated to 70.5μg·g -1 ,114μg·g -1 and 83.4μg·g -1 ,re-spectively.The experiment results fromdifferent concentrations of Cd were also discussed and the viewpoin t was given that some of the traditional crop seedlings would have a good blastofiltration ecologic al application prospects in the phytoremediation of Cd pollution in water.