Phytoremediation of heavy metals by Eichhornia crassipes

被引：71

作者：

Odjegba V.J. ^{[1
]}

Fasidi I.O. ^{[2
]}

机构：

[1] Department of Botany and Microbiology, University of Lagos, Akoka, Yaba, Lagos

[2] Department of Botany and Microbiology, University of Ibadan, Ibadan

来源：

The Environmentalist | 2007年 / 27卷 / 3期

关键词：

Bioconcentration; Eichhornia crassipes; Heavy metals; Pollution;

D O I：

10.1007/s10669-007-9047-2

中图分类号：

学科分类号：

摘要：

Eichhornia crassipes was tested for its ability to bioconcentrate 8 toxic metals (Ag, Cd, Cr, Cu, Hg, Ni, Pb, and Zn) commonly found in wastewater from industries. Young plants of equal size were grown hydroponically and amended with 0, 0.1, 0.3, 0.5, 1.0, 3.0, and 5.0 mM of each heavy metal individually for 21 days. The test plant had the lowest and the highest tolerance indices for Hg and Zn, respectively. A significant (P ≤ .05) reduction in biomass production was observed in metal treated plants compared with the control. All strace elements accumulated to higher concentrations in roots than in shoots. Trace element concentrations in tissues and the bioconcentration factors (BCF) were proportional to the initial concentration of individual metal in the growth medium and the duration of exposure. From a phytoremediation perspective, E. crassipes is a promising plant species for remediation of natural water bodies and/or wastewater polluted with low levels of Zn, Cr, Cu, Cd, Pb, Ag and Ni. © 2007 Springer Science+Business Media, LLC.

引用

页码：349 / 355

页数：6

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