Research on the Tolerance and Absorbability of Three Kinds of Commercial Timber to the Heavy Metal Pb

In this study,stress experiments of heavy metal Pb were carried out on the three kinds of commercial timber——Eucalyptus grandis,Toona ciliata and Phoebe nanmu with sand pot-planting method indoors.The result showed that the three kinds of timber all had certain absorptive ability to Pb,and there might be an absorption mechanism in all of their bodies.Under the experimental conditions,the absorptive ability to Pb of Phoebe nanmu was 3.63 times than that of Eucalyptus,and 4.2 times than that of Toona ciliata,and the ability of Eucalyptus was 1.16 times than that of Toona ciliata.