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metadata.artigo.dc.title: Cadmium uptake by lettuce (Lactuca sativa L.) as basis for derivation of risk limits in soils
metadata.artigo.dc.creator: Melo, Leônidas Carrijo Azevedo
Alleoni, Luís Reynaldo Ferracciú
Swartjes, Frank Albert
Silva, Evandro Barbosa da
metadata.artigo.dc.subject: Tropical soils
Vegetable uptake
Risk assessment
Guideline values
Solos tropicais
Captação de vegetais
metadata.artigo.dc.publisher: Taylor & Francis 2012
metadata.artigo.dc.identifier.citation: MELO, L. C. A.; ALLEONI, L. R. F.; SWARTJES, F. A.; SILVA, E. B. da. Cadmium uptake by lettuce (Lactuca sativa L.) as basis for derivation of risk limits in soils. Human and Ecological Risk Assessment: An International Journal, [S, l.], v. 18, n. 4, p. 888-901, 2012.
metadata.artigo.dc.description.abstract: The availability and uptake of Cd by lettuce (Lactuca sativa L.) in two common tropical soils (before and after liming) were studied in order to derive human health-based risk soil concentration. Cadmium concentrations ranging from 1 to 12 mg kg−1 were added to samples from a clayey Oxisol and a sandy-loam Ultisol under glasshouse conditions. After incubation, a soil sample was taken from each pot, the concentration of Cd in the soil was determined, lettuce was grown during 36 d, and the edible parts were harvested and analyzed for Cd. A positive linear correlation was observed between total soil Cd and the Cd concentration in lettuce. The amount of Cd absorbed by lettuce grown in the Ultisol was about twice the amount absorbed in the Oxisol. Liming increased the soil pH and slightly reduced Cd availability and uptake. CaCl2 extraction was better than DTPA to reflect differences in binding strength of Cd between limed and unlimed soils. Risk Cd concentrations in the Ultisol were lower than in the Oxisol, reflecting the greater degree of uptake from the Ultisol. The derived risk Cd values were dependent on soil type and the exposure scenario.
metadata.artigo.dc.language: en_US
Appears in Collections:DCS - Artigos publicados em periódicos

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