RT Journal Article
T1 Metal extractability patterns to evaluate (potentially) mobile fractions in periurban calcareous agricultural soils in the Mediterranean area—analytical and mineralogical approaches
A1 Santiago Martín, Ana De
A1 Valverde Asenjo, María Inmaculada
A1 Quintana Nieto, José Ramón
A1 Vázquez, Antonio
A1 López Lafuente, Antonio Leovigildo
A1 González Huecas, Concepción
AB A set of periurban calcareous agricultural Mediterranean soils was spiked with a mixture of Cd, Cu, Pb and Zn at two levels within the limit values proposed by current European legislation, incubated for up to 12 months, and subjected to various one-step extraction procedures to estimate mobile (neutral salts) and potentially mobile metal fractions (complexing and acidic extraction methods). The results obtained were used to study metal extractability patterns according to the soil characteristics. The analytical data were coupled with mineralogical investigations and speciation modelling using the Visual Minteq model. The formation of soluble metal-complexes in the complexing extracts (predicted by the Visual Minteq calculations) led to the highest extraction efficiency with complexing extractants. Metal extractability patterns were related to both content and composition of carbonate, organic matter, Fe oxide and clay fractions. Potentially mobile metal fractions were mainly affected by the finest soil fractions (recalcitrant organic matter, active lime and clay minerals). In the case of Pb, scarce correlations between extractable Pb and soil constituents were obtained which was attributed to high Pb retention due to the formation of 4PbCO3·3PbO (corroborated by X-ray diffraction). In summary, the high metal proportion extracted with complexing agents highlighted the high but finite capacity to store potentially mobilizable metals and the possible vulnerability of these soils against environmental impact from metal accumulation.
PB Springer
SN 0944-1344
YR 2013
FD 2013
LK https://hdl.handle.net/20.500.14352/96428
UL https://hdl.handle.net/20.500.14352/96428
LA eng
NO de Santiago-Martín A, Valverde-Asenjo I, Quintana JR, Vázquez A, Lafuente AL, González-Huecas C. Metal extractability patterns to evaluate (potentially) mobile fractions in periurban calcareous agricultural soils in the Mediterranean area—analytical and mineralogical approaches. Environ Sci Pollut Res 2013;20:6392–405. https://doi.org/10.1007/s11356-013-1684-z.
NO Universidad Complutense de Madrid
NO Comunidad de Madrid
DS Docta Complutense
RD 9 abr 2025