New DDT inputs after 30 years of prohibition in Spain. A case study in agricultural soils from south-western Spain
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 R(p,)(p')/(p,)(p') = [p, p'-DDE + p, p'-DDD]/[...
| Autores: | , |
|---|---|
| Tipo de recurso: | artículo |
| Estado: | Versión aceptada para publicación |
| Fecha de publicación: | 2011 |
| País: | España |
| Institución: | Consejo Superior de Investigaciones Científicas (CSIC) |
| Repositorio: | DIGITAL.CSIC. Repositorio Institucional del CSIC |
| OAI Identifier: | oai:digital.csic.es:10261/415165 |
| Acceso en línea: | http://hdl.handle.net/10261/415165 https://api.elsevier.com/content/abstract/scopus_id/80053635997 |
| Access Level: | acceso abierto |
| Palabra clave: | Chiral analysis DDE DDT Dicofol Enantiomeric fractions o,p′-DDT Soils Spain |
| Sumario: | 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 R(p,)(p')/(p,)(p') = [p, p'-DDE + p, p'-DDD]/[p, p'-DDT]. According to the ratio R₀,(p')/(p,)(p') = [o, p'-DDT]/[p, p'-DDT] , 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, R(p,)(p')/(p,)(p') and R₀,(p')/(p,)(p'). Given the health risks posed by DDT, our findings support how the environmental control of legacy pollutants such as DDT cannot be neglected. |
|---|