Dissipation of beta -cyfluthrin in water as affected by sediment, pH, and temperature.

摘要

The effects of pH, temperature and sediments on the dissipation of beta -cyfluthrin in water were studied under laboratory conditions. For this purpose, 20 ml of water in test tubes was fortified with the insecticide at 0.01 and 0.1 micro g/ml and subjected to the various treatments. Results showed that beta -cyfluthrin residues persist in water up to 15 days with a half-life of 8-10 days. The presence of sediments increased the loss of insecticide from water by adsorption during initial periods. The insecticide in sediments dissipated very slowly, thereby increasing the overall persistence in water-sediment system. beta -Cyfluthrin dissipated faster with increasing pH and temperature.