Copper distribution and fractionation in aggregate fractions from vineyard soils: comparison with zinc [Spain]
2005; Pavia University Press; Volume: 49; Linguagem: Inglês
ISSN
2283-5431
AutoresManuel Arias‐Estévez, E. López, B. Soto,
Tópico(s)Heavy metals in environment
ResumoThe presence of various Cu forms associated to different soil aggregate sizes influences their availability to plants and their leaching to surface and subsurface waters. In this work, the speciation of Cu of essentially anthropogenic origin between aggregates of variable size in vineyard soils was studied and compared with that of Zn, which is assumed to come largely from natural sources. The copper concentrations were found to exceed the zinc concentrations in all soils and particle size fractions studied. Worth special note was the sand fraction, which contained much higher Cu and Zn concentrations than the fractions of smaller particle size. Also, the Cu content in the sand fraction was significantly correlated with the amount of soluble Cu in water (r = 0.69, p < 0.01). Organically bound Cu and residual Zn constituted the most important fractions in the three aggregate sizes studied.
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