TY - JOUR
T1 - Comparison of two sequential extraction procedures for uranium fractionation in contaminated soils
AU - Vandenhove, Hildegarde
AU - Vanhoudt, Nathalie
AU - Duquène, Lise
AU - Antunes, Kenny
AU - Wannijn, Jean
N1 - Score = 10
PY - 2014/11
Y1 - 2014/11
N2 - Two sequential extraction procedures were carried out on six soils with different chemical properties and contamination history to estimate the partitioning of U between different soil fractions. The first method (method of Schultz) was specifically developed for actinides, while the second one (method of Rauret) was initially created for heavy metals. A soil-to-plant transfer experiment was carried out with ryegrass to verify if one of the extracted fractions efficiently predicted plant uptake. In artificially contaminated soils, most of the U was retrieved from the exchangeable and the carbonates fractions. In soils with high natural levels of U or contaminated by industrial activity, most of the U was found in the less available fractions. The highest U transfer factors (TF) were observed for artificially contaminated soils and the lowest for soils with high natural concentrations or industrial contamination. The U concentration in the roots and shoots and the soil-to-root TF are well correlated to the U concentration determined in the first extracted fractions from the method of Schultz. Conclusion: the extraction method according to Schultz should be preferably used for U, and the exchangeable fraction can be proposed as a potential indicator to evaluate plant uptake in soils.
AB - Two sequential extraction procedures were carried out on six soils with different chemical properties and contamination history to estimate the partitioning of U between different soil fractions. The first method (method of Schultz) was specifically developed for actinides, while the second one (method of Rauret) was initially created for heavy metals. A soil-to-plant transfer experiment was carried out with ryegrass to verify if one of the extracted fractions efficiently predicted plant uptake. In artificially contaminated soils, most of the U was retrieved from the exchangeable and the carbonates fractions. In soils with high natural levels of U or contaminated by industrial activity, most of the U was found in the less available fractions. The highest U transfer factors (TF) were observed for artificially contaminated soils and the lowest for soils with high natural concentrations or industrial contamination. The U concentration in the roots and shoots and the soil-to-root TF are well correlated to the U concentration determined in the first extracted fractions from the method of Schultz. Conclusion: the extraction method according to Schultz should be preferably used for U, and the exchangeable fraction can be proposed as a potential indicator to evaluate plant uptake in soils.
KW - NORM
KW - sequential extraction procedure
KW - soil-to-plant transfer
KW - uranium
UR - http://ecm.sckcen.be/OTCS/llisapi.dll/open/ezp_137321
UR - http://knowledgecentre.sckcen.be/so2/bibref/11943
U2 - 10.1016/j.jenvrad.2014.05.024
DO - 10.1016/j.jenvrad.2014.05.024
M3 - Article
VL - 137
SP - 1
EP - 9
JO - Journal of environmental radioactivity
JF - Journal of environmental radioactivity
IS - 11
ER -