 |
| Titel |
Accumulation of heavy metals in plants growing around an abandoned mine in Poblet, Tarragona (NE Spain) |
| VerfasserIn |
Jaume Bech, Paola Duran, Núria Roca, Juan Barceló, Rafael Boluda, Luís Roca-Pérez, Charlotte Poschenrieder |
| Konferenz |
EGU General Assembly 2011
|
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 13 (2011) |
| Datensatznummer |
250047407
|
|
|
|
|
|
| Zusammenfassung |
| In mediterranean region, many of the metal rich soils are located in small, heavily
disturbed areas and show a typical pseudometallophyte vegetation. These plants have
attracted less attention than metallophytes. However, according to previous studies the
pseudometallophytes are species that are able to adapt to a wide range of adverse soil
conditions. We studied top soil and spontaneous plants collected around the old
abandonated mine located in Poblet, Tarragona (Catalonia-Spain). Plants and soils were
sampled and analyzed for concentrations of Al, Cr, Cu, Fe, Ni, Pb, V and Zn. The
translocation factors (TF) and the bioaccumulation factors (BF) were determined
and used to measure each plant’s effectiveness for concentrating metals into its
biomass.
The top soil had acid pH (5.8±0.4) with a relatively high content of organic carbon
(7.26±3.82) and a sandy texture i.e., silts (27.9±2.47) and clay (11.16±2.07). High Al (5.0
to 6.2%), Cu (157 to 518 mg.kg-1), Pb (97 to 224 mg.kg-1) and Zn (195 to 704 mg.kg-1)
concentractions were detected. Concentrations of Cr, Cu, Ni, Pb, V, and Zn found in soils
around the Poblet mine were clearly higher than background levels reported for the Tarragona
area. Among the plants, only Cistus salvifolius was able to accumulate higher metal
concentrations in shoots than in roots. In the rest of species preferent accumulation in roots
was observed. High concentration of Al were found in the rhyzome of Polypodium
vulgare (2000 mg.kg-1). Rubia peregrine was able to accumulate the highest metal
concentration of Cu in its roots (45 mg.kg-1) while Viburnum tinus was able to accumulate
the highest metal concentration of Zn (210 mg.kg-1). Dactylis glomerata despite
growing in soils with high Cu burdens (> 500 mg.kg-1) was able to efficiently
exclude Cu from its tissues. Cistus salvifolis accumulated high Al concentrations
in shoots (around 3000 mg.kg-1), similar concentrations have been reported for
Al-hyperaccumulator species. The low TFs indicate that plants accumulated metals mainly in
roots, except in C. salvifolius, which showed TF values >1. BFs values were |
|
|
|
|
|
|