Distribution of cadmium in a cultivated soil in Britanny, France

Scientia Agricola

Gisele Mara Hadlich²  José Martin Ucha¹ 

[1] ,UFBA IGEO Depto. de GeoquímicaSalvador BA ,Brasil

关键词: Cd;    soil pollution;    Tessier protocol;    sequencial extraction;    Cd;    poluição do solo;    método Tessier;    extração sequencial;   

DOI  :  10.1590/S0103-90162010000600017

来源: SciELO

【 摘 要 】

Cadmium (Cd) can be potentially toxic to the environment, and its bioavailability is related to the chemical forms it occurs in the soils. The distribution of Cd into the solid phase and its availability was investigated in a cultivated soil in Britanny, France. Cd sequential extraction was performed using a modified Tessier's sequential extraction protocol. Total content of Cd (n = 22 samples) ranged from 0.13 to 0.37 mg kg¹. Long term history of organic and mineral fertilizers application increased Cd concentration in the surface horizon. The fate of Cd was correlated with soil available P2O5 concentration and pH. The regression analysis (linear and non-linear) and Principal Component Analysis revealed the synergistic effect of P2O5 in the retention of Cd in cultivated soils. The following fractions' sequence was observed: bounded to Fe and Al oxides + phosphates > exchangeable > bound to organic matter » residual fraction.

【 授权许可】

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