New DDT inputs after 30 years of prohibition in Spain. A case study in agricultural soils from south-western Spain

Muñoz-Arnanz, Juan; Jiménez, Begoña

New DDT inputs after 30 years of prohibition in Spain. A case study in agricultural soils from south-western Spain

2011

Muñoz-Arnanz, Juan | Jiménez, Begoña

This study provides information on the current status of contamination by DDT in agricultural soils in south-western Spain. A recent use of technical DDT in at least 17% of the soils was found based on the values (<1) of the ratio [Formula: see text] . According to the ratio [Formula: see text] , a dicofol type contamination was detected in about 27% of the soils. A wide range of concentrations was observed (0.08–11.1 ng/g d.w.) regardless of the type of crop soil. Enantiomeric fractions (EFs), based on the chiral analysis of o,p′-DDT residues differed from the racemic value (0.500) in most soils but they were not correlated with the study variables [DDTs], SOM, [Formula: see text] and [Formula: see text] . Given the health risks posed by DDT, our findings support how the environmental control of legacy pollutants such as DDT cannot be neglected.

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