Published in Scientific Papers. Series E. Land Reclamation, Earth Observation & Surveying, Environmental Engineering, Vol. XI
Written by Violina ANGELOVA
Comparative research has been carried out to determine the accumulation of heavy metals, macro, and microelements in the vegetative organs of Odontarrhena chalcidica, collected from serpentine soils from the Eastern and South Rhodopes Mountains (Bulgaria). The content of metals in the plant varies depending on the sampling location and, above all, on the content of their mobile forms in the soil. In Odontarrhena chalcidica plants, the maximum concentrations of Ni were up to 873.1 mg/kg in roots, 924.9 mg/kg in shoots, 8317 mg/kg in leaves, and 6693 mg/kg in flowers. Ca/Mg ratio in plant tissues were up to 6.2 (roots), 7.4 (stems), 10.2 (leaves), and 7.4 (flowers). There is a distinct pattern in the accumulation of heavy metals in the vegetative organs of Odontarrhena chalcidica. Most of the Ni, Ca and Mg accumulate in the leaves and flowers, K and P in the flowers. There is no clear trend for Pb, Zn, Cu Fe, Mn, Cr and Co. This study shows that Odontarrhena chalcidica from serpentine soils of Bulgaria appears as a strong Ni hyperaccumulator and can be used for phytoextraction purposes.
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