Plant Soil Environ., 2003, 49(12):548-553 | DOI: 10.17221/4192-PSE

Phytoextraction of lead, zinc and cadmium from soil by selected plants

B. Kos, H. Grčman, D. Leštan
Biotechnical Faculty, University of Ljubljana, Slovenia

The Pb, Zn and Cd phytoextraction potential of 14 different plants was assessed in a chelate induced phytoextraction experiment. In the used soil heavy metals mainly reside in carbonate, organic matter, and residual soil fractions. The addition of a chelate, 5 mmol/kg ethylenediamine-tetracetic acid (EDTA), increased the proportion of phytoavailable Pb, Zn and Cd in the soil (dissolved in soil solution and exchangeable from soil colloids), and also their uptake by tested plants up to 48 times (Sinapis alba), 4.6 times (Raphanus sativus oleiformis), and 3.3 times (Amaranthus spp.), respectively, compared to the control. The biodegradable chelate ethylenediamine-disuccinic acid (EDDS) was generally less effective (tested on a selection of 4 plant species), except for Cannabis sativa. In a treatment with 10 mmol/kg EDDS, Pb, Zn and Cd concentrations of 1053 ± 125, 211 ± 16 and 5.4 ± 0.8 mg/kg, respectively, were measured in the biomass of Cannabis sativa and were 105, 2.3 and 31.7 times higher, respectively, than in the control treatment. The calculated Pb phytoextraction potential of Cannabis sativa amounted to 26.3 kg/ha.

Keywords: lead; zinc; cadmium; soil remediation; phytoextraction; chelates

Published: December 31, 2003  Show citation

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Kos B, Grčman H, Leštan D. Phytoextraction of lead, zinc and cadmium from soil by selected plants. Plant Soil Environ. 2003;49(12):548-553. doi: 10.17221/4192-PSE.
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