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Fitodisponibilidad de Cd en suelo de diferente pH tratado con lodo albañal estimada por método isotópico y extracción química

2008; Brazilian Chemical Society; Volume: 31; Issue: 5 Linguagem: Inglês

10.1590/s0100-40422008000500014

ISSN

1678-7064

Autores

Felipe Carlos Alvarez Villanueva, Antônio Enedi Boaretto, Cassio Hamilton Abreu‐Junior, Takashi Muraoka, Anderson Ricardo Trevizam, Virgílio Franco do Nascimento Filho,

Tópico(s)

Environmental and Analytical Chemistry Studies

Resumo

ISOTOPICMETHOD AND CHEMICAL EXTRACTION.The Cd phytoavailability in sewage sludge-amended soils of different pHs using the 109 Cd L-value isotopic method and Cd extracted by DTPA has been determined.Maize plants (Zea mais L.) were grown under greenhouse conditions in a xanthic ferralsol at different pHs amended with five sewage sludge (SS) rates, and labeled with 74 kBq kg -1 of 109 Cd.The SS rates altered the properties of the soil chemicals and these influenced the isotopic parameter (L-value) and percent of Cd uptake by plants from soil (%Cdpdfs) and SS (%CdpdfSS).L-values and Cd extracted by DTPA correlate significantly with SS rates and Cd uptake by plants and are efficient for predicting the Cd phytoavailability in the sewage sludge-amended soil.

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