CRISTIANA RADULESCU, CLAUDIA STIHI, LUCICA BARBES, ANDREI CHILIAN, DANIELA ELENA CHELARESCU<br>Studies Concerning Heavy Metals Accumulation of Carduus nutans L. and Taraxacum officinale as Potential Soil Bioindicator Species

CRISTIANA RADULESCU, CLAUDIA STIHI, LUCICA BARBES, ANDREI CHILIAN, DANIELA ELENA CHELARESCU
Studies Concerning Heavy Metals Accumulation of Carduus nutans L. and Taraxacum officinale as Potential Soil Bioindicator Species

Abstract:

This study assessed the level of heavy metal uptake by two weeds such as Carduus nutans L., and Taraxacum officinale which are growing naturally, without specific requirements, alongside the roads, disturbed sites, on strongly polluted places such as smelters, railway tracks, coal mines, and other industrial plants from Romania, in order to identify the hyper-accumulator species that could be used for future phytoremediation purpose. Concentrations of elements including Pb, Cr, Cd, Cu, Zn and Ni were analyzed in the soil and leaf samples collected from two historical polluted sites: North Năvodari Camp and former Fertilizer Chemical Plants (USAS) Navodari. Trace metals concentrations (i.e. Cd and Cr) in leaf samples were determined by Graphite Furnace Atomic Absorption Spectrometry (GFAAS). The other metal concentrations including Zn, Ni, Pb and Cu were performed by Flame Atomic Absorption Spectrometry (FAAS). The bioaccumulation factors have been calculated as well. This investigation has shown that Taraxacum Officinale L. and Cardus Nutans L. accumulate high levels of Pb (BF ] 1 depending the sampling period) as well as Cu, from soil to leaves, and from this reason it is expected that these weeds to be used with success as bioindicator plants for metal contaminated soil. Keywords: biaccumulation factor, heavy metal bioindicator, Carduus nutans L., Taraxacum officinale

Issue: 2013, Volume 64, Issue 7

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