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You are here: Home » Past Issues » Volume 9, 2014 - Number 3 » MOBILITY OF HEAVY METALS IN ARABLE SOILS FROM BREGU I MATIT PLAIN, NW ALBANIA


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Elian KASA1, Peter FELIX-HENNINGSEN2, Rolf-Alexander DUERING2, Besnik GJONGECAJ1 & Fran GJOKA1
1Agricultural University of Tirana, Koder Kamez, Tirana, Albania, fgjoka2001@gmail.com
2Institute of Soil Science and Soil Conservation, Justus-Liebig University of Giessen, Heinrich-Buff-Ring 26 (IFZ) 35392 Giessen, Germany

MOBILITY OF HEAVY METALS IN ARABLE SOILS FROM BREGU I MATIT PLAIN, NW ALBANIA

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Abstract:

In this study, the surface soil samples collected from irrigated soils of Bregu i Matit Plain were analysed for mobile forms of heavy metals in order to evaluate the risk of soil pollution with metals. The NH4EDTA extractable As, Cr and Ni and NH4NO3 extractable Cr, Cu, Ni and As increased significantly in the irrigated soils as compared to non-irrigated soil. The higher metal proportions extracted with EDTA are found for Cd (33.6%), Cu (11.34%), Pb (11%) and Ni (1.37%), and for Cd (0.70%) and Cu (0.28%) extracted with NH4NO3. The order of metal extractability in EDTA was: Cd>Cu>Pb>Ni>Zn>As>Cr indicating that Cd and Pb are associated with organic matter more than Cu and Ni, and in NH4NO3 was: Cd>Cu>Pb> Ni>As>Zn>Cr which corresponds to the sequence of metal mobility. Only the Pb was proportional to the total content in aqua regia. The mobility of Cd, Cu, Ni, Pb and Zn is controlled by pH. Although there is no actual harmful pollution of soils with heavy metals, a potential risk of soil pollution with Cd, Cu and Pb exists, because their mobility and bioavailability can be increased due to soil acidification.


Keyword: ecological risk, heavy metal fraction, NH4-EDTA, NH4NO3 soil pollution, Albania


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