The potential of Thlaspi caerulescens for phytoremediation of contaminated soils

摘要: Uptake of Cd, Zn, Pb and Mn by the hyperaccumulator Thlaspi caerulescens was studied pot trials in plant growth units populations wild plants growing over Pb/Zn base-metal mine wastes at Les Malines south France. The utilised metal-contaminated soils from Auby Lille area. Zinc Cd concentrations averaged 1.16% 0.16% (dry weight) respectively. unfertilised biomass 2.6 t/ha. A single fertilised crop with above metal content could remove 60 kg Zn 8.4 per hectare. Experiments pot-grown showed that weight basis) were up to 1% (4% soil) just 0.1% (0.02% soil). correlated strongly plant-available fraction as measured extraction ammonium acetate inversely pH. Bioaccumulation coefficients (plant/soil concentration quotients) general higher for than except low soil. There a tendency these increase decreasing It is proposed phytoremediation using would be entirely feasible levels where only needed halve 10 μg/g will never possible remediate elevated within an economic time frame (<10 yr) because lower bioaccumulation coefficient this element coupled much soils.