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Abstract
The stability of dieldrin, aldrin, lindane, chlorpyrifos and prothiofos was determined in distilled water and in roof water from either galvanised or concrete tanks. Samples were stored in the dark at 23°C. Dieldrin and lindane were stable for the 36 week period. Aldrin dissipated rapidly with a half‐life of 4–5 weeks, with no dieldrin being formed. Chlorpyrifos and prothiofos also broke down, with half‐lives ranging 12–18 weeks and 11–14 weeks respectively. No significant effect of water type was found. For the purpose of domestic usage, an activated carbon filter would be essential otherwise all contaminated water would have to be disposed of safely.
Notes
Present address: Tea Research Institute, Yunxi Road, Hangzhon, China.
Present address: Department of Environmental Biology, University of Guelph, Guelph, Ontario, Canada N1G 2W1