engleski

Phytoremediation of Cadmium (Cd) from soil by hyperaccumulator plant Thlaspi caerulescens (L.)

Heavy metal contamination of agricultural soils can be a major problem in agriculture. Because of the limited arable land and greater demand for food it is necessary to remediate polluted soils. For these reasons it is important to conduct phytoremediation research. Hyperaccumulator plant Thlaspi caerulescens (L.) is a very promising phytoremediation plant of zinc and cadmium. Previous studies were mainly based on zinc hyperaccumulation while cadmium was placed in the background. The aim of this study was to determine whether T. caerulescens exhibits the same affinity for cadmium adoption as it shows towards zinc (proliferation and foraging, increased adoption into biomass). The experiment was set in four treatments (two with homogeneous and two with heterogeneous distribution of Cd) which had different Cd concentrations in the soil (0 – 500 mg/kg Cd). Plants were grown in rhizoboxes separated into two halves (contaminated and control). Measurements and analysis showed that the root mass ranged from 0.7585 to 1.6420 g, plant biomass ranged from 2.0015 to 3.4518 g, and Cd concentration in plants ranged from 960.8 to 2931 mg/kg Cd, depending on the treatment. Results showed that T. caerulescens does not show increased root proliferation in the areas with higher Cd concentrations and that there is no influence of increased Cd concentrations in the soil to greater biomass growth, but higher concentrations of Cd in the soil have an impact on higher accumulation of Cd in plant biomass.

Cadmium (Cd); Heavy metal pollution; Phytoremediation; Hyperacumulation; T. caerulescens

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