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Título

Heavy metals fractionation and organic matter mineralisation in contaminated calcareous soil amended with organic materials

AutorClemente Carrillo, Rafael ; Escolar, Ángeles; Bernal Calderón, M. Pilar
Palabras claveCarbon mineralisation
Heavy metals
Organic amendments
Sequential extraction
Soil contamination
Fecha de publicaciónoct-2006
EditorElsevier
CitaciónBioresource Technology 97(15): 1894-1901 (2006)
ResumenDegradation of organic matter (OM) from organic amendments used in the remediation of metal contaminated soils leads to changes in soil chemical properties shortly after their addition, which may affect the soil metal distribution. The effects of two differing organic amendments on OM mineralisation and fractionation of heavy metals in a contaminated soil were investigated in an incubation experiment. The treatments were: control unamended soil, soil amended with fresh cow manure, and soil amended with a compost having a high maturity degree. The soil used was characteristic of the mining area at La Unión (Murcia, Spain) with 28% CaCO3 and sandy-loam texture (pH 7.7; 2602 mg kg−1 Zn; 1572 mg kg−1 Pb). Manure and compost C-mineralisation after 56 days (24% and 3.8%, respectively) were below values reported previously for uncontaminated soils. Both amendments favoured Zn and Pb fixation, particularly the manure. Mn solubility increased at the beginning of the experiment due to a pH effect, and only Cu solubility increased through organic matter chelation in both amended soils.
Descripción8 pages, 2 figures, 5 tables.
Versión del editorhttp://dx.doi.org/10.1016/j.biortech.2005.08.018
URIhttp://hdl.handle.net/10261/16364
DOI10.1016/j.biortech.2005.08.018
ISSN0960-8524
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