PHYTOEXTRACTION - THE USE OF PLANTS TO REMOVE HEAVY-METALS FROM SOILS
PHYTOEXTRACTION - THE USE OF PLANTS TO REMOVE HEAVY-METALS FROM SOILS
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DOI：
10.1021/es00005a014
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发表时间：
1995-05-01
影响因子：
11.4
通讯作者：
RASKIN, I
中科院分区：
文献类型：
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作者：
KUMAR, PBAN;DUSHENKOV, V;RASKIN, I
少数生长在重金属污染土壤上的野生植物，其根和芽中积累了大量的重金属。如果一个容易种植，高生物量的作物能够积累重金属被确定，这种属性可能被利用的土壤复垦。因此，比较了不同作物地上部和根系对铅的富集能力。虽然所有测试的作物十字花科植物都积累了铅，但芥菜型油菜的一些品种（L.）Czern，表现出较强的积累能力和向地上部的转运能力（根中108.3mg Pb/g DW，地上部34.5mg Pb/g DW）。B。芥菜还能够从含有硫酸盐和磷酸盐作为肥料的基质中分别将Cr 6+、Cd、Ni、Zn和Cu富集到芽中58、52、31、17和7倍。B的部分品种对重金属的积累量较高。juncea认为，这些植物可在一个称为植物提取的过程中用于清理有毒金属污染的场地。
A small number of wild plants that grow on metal-contaminated soil accumulate large amounts of heavy metals in their roots and shoots. This property may be exploited for soil reclamation if an easily cultivated, high biomass crop plant able to accumulate heavy metals is identified. Therefore, the ability of various crop plants to accumulate Pb in shoots and roots was compared. While all crop Brassicas tested accumulated Pb, some cultivars of Brassica juncea (L.) Czern, showed a strong ability to accumulate Pb in roots and to transport Pb to the shoots (108.3 mg of Pb/g DW in the roots and 34.5 mg of Pb/g DW in the shoots). B. juncea was also able to concentrate Cr6+, Cd, Ni, Zn, and Cu in the shoots 58-, 52-, 31-, 17-, and 7-fold, respectively, from a substrate containing sulfates and phosphates as fertilizers. The high metal accumulation by some cultivars of B. juncea suggests that these plants may be used to clean up toxic metal-contaminated sites in a process termed phytoextraction.