PHYTOAVAILABILITY ASSESSMENT OF CADMIUM AND LEAD IN POLLUTED SOILS AND ACCUMULATION BY MATRICARIA CHAMOMILLA
2013
Voyslavov, Ts., Sofia University "St. Kliment Okhridski", Sofia (Bulgaria) | Georgieva, S., Sofia University "St. Kliment Okhridski", Sofia (Bulgaria) | Arpadzhan, S., Sofia University "St. Kliment Okhridski", Sofia (Bulgaria) | Tsekova, K., Institute of Microbiology, Sofia (Bulgaria)
Surface soil and chamomile plant samples from 26 locations affected by several anthropogenic sources - coal-burning power plant, traffic emissions, lead/zinc and iron factories were collected in Bulgaria. The mobilizable - extracted by 0.11 mol/L acetic acid and the phytoavailable - extracted by 0.05 mol/L EDTA metal fractions were evaluated using the extraction protocols proposed by the Standards, Measurements and Testing Programme of the European Union - BCR. Cadmium accumulation in chamomile roots, stems and flowers correlated well with acetic acid/EDTA soluble Cd as well as with the total soil cadmium - r 0.84. However, lead uptake was found to correlate significantly only with its content in the EDTA-soluble soil fraction r 0.82. The results reveal that single soil extraction with EDTA is an appropriate procedure for quick estimation of potential availability of Cd and Pb to chamomile plants from polluted soils.
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