engleski

Transformation and redistribution of anthropogenic copper, lead and zinc in soils

The problem of exposure of agricultural soils to different anthropogenic inputs of heavy metals and other potentially toxic substances has acquired global dimensions in the last decades. In addition to atmospheric deposition, environmental dispersion of chemicals used in agriculture, such as fertilizers and pesticides, is an important factor directly affecting natural soil functions, or indirectly endangering the biosphere by bioaccumulation and inclusion into the food chain. The contaminating effect of heavy metals in soils depends on chemical associations. The initial or native pattern of the metal distribution strongly depends on the soil properties and the characteristics of the given element. Heavy metals added in soils tend to be redistributed over time among the solid-phase components. Hence, determining the long-term transformation of added metals in soils is important to evaluate their mobility and bioavailability. The main objective of this study was to determine the partitioning and pathways of transformations of native and added Cu, Pb and Zn in two soils during a period of one year using a selective sequential dissolution procedure.

heavy metals; bioavailability; mobility; selective sequential dissolution

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