Cadmium and Other Metal Uptake by Lobelia chinensis and Solanum nigrum from Contaminated Soils
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Cadmium concentrations in two plant species and their corresponding soils were evaluated in a metal contaminated area. The average Cd concentrations reached 36.9 and 141 mg kg−1 in Solanum nigrum leaves and Lobelia chinensis shoots, respectively. There is a significant relationship between the Cd concentration in the aerial tissues and the corresponding soils on a logarithmic scale. Under the hydroponic culture conditions, the maximum Cd concentration in the S. nigrum leaves and L. chinensis shoots were 1,110 and 414 mg kg−1, respectively. Cd concentration was higher in the roots than in the aerial parts. The two plants may be used in suitable phytoremediation process.
KeywordsCadmium Accumulation Plant Phytoextraction Contaminated soil
The project was supported by the Teaching and Research Award Program for Outstanding Young Teachers in Higher Education Institutions of MOE and a postdoctoral Research Fellowship from The Hong Kong Polytechnic University (G-YX88).
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