湘江水生植物对三种重金属的吸收研究

Study on the Absorption of Three Kinds of Heavy Metals by Aquatic Plants in Xiangjiang River

研究了湘江水生植物蓼、水葫芦吸收和降解重金属的能力,开展了其吸收重金属铜、锌和铅(Cu、Zn和Pb)的室内模拟实验。实验结果表明,水生植物对三种重金属均有不同程度的吸收,蓼和水葫芦对铅的净化效果最为显著,吸收率分别可达到98.8%和98.2%;对重金属铜的净化效果次之,吸收率分别也可达到98.1%和94.2%;对锌的净化效果最弱,吸收率分别为82.6%和74.1%,但吸收效果也非常可观。

In order to explore the ability of the aquatic plants to absorb and degrade heavy metals,we carry out the indoor simulation experiment of aquatic plants such as Polygonum,Eichhorniacrassipes and so on degrading heavy metals such as cuprum,zinc and plumbum.The experimental results show that aquatic plants have different degrees of absorption of the three heavy metals.Polygonum and Eichhorniacrassipes are very good for the purification of plumbum,The absorption rate of Polygonum is 98.8%and the absorption rate ofEichhorniacrassipes is 98.2%.The aquatic plants'purification effect on heavy metal copper is second.The absorption rate of Polygonum is 98.1%and the absorption rate of Eichhorniacrassipes is 94.2%.The purification effect of zinc is the weakest.The absorption rate of Polygonum is 82.6%and the absorption rate of Eichhorniacrassipes is 74.1%.But the absorption degradation effect is also considerable.