If banned, why was the organochlorine insecticide dieldrin so commonly detected in fish tissue and bed sediment?
High concentrations are likely because of dieldrins persistence and widespread use in the past, especially in regions high in corn production. Dieldrin binds tightly to soil and is stored in fat, so higher concentrations are found in fish tissue than in water or sediment. Dieldrin is a byproduct of the insecticide aldrin; therefore, elevated concentrations may reflect a combination of aldrin and dieldrin residues.
Related Questions
- Why were many of the organic compounds detected in fish and streambed sediment not examined in the water samples?
- If banned, why was the organochlorine insecticide dieldrin so commonly detected in fish tissue and bed sediment?
- Why were elevated PCB concentrations found in fish tissue and not in sediment?
