Add time:08/26/2019         Source:sciencedirect.com

A study was undertaken to examine the uptake of the organophosphate insecticide Pyridaphenthion (cas 119-12-0) in the chlorophyta Chlorella saccharophila. Algae cultures were exposed to the initial nominal concentration 10.0 mg l−1 pyridaphention during seven days. The insecticide bioconcentrates in the biomass to the highest level of 441.5 ± 25.9 mg kg−1 on the fifth day of exposure and was followed by a decrease to 76.6 ± 5.1 mg kg−1 on the seventh day. A model was constructed to describe the dynamic process, which estimated a bioconcentration factor (BCF) equal to 28. The study demonstrates the potential of accumulation of pyridaphenthion in aquatic organisms and helps to expand the pyridaphenthion toxicity database. The replacement of fenitrothion by pyridaphenthion concerning their use in rice flooded cultures is discussed.

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