Transport of dieldrin between air and water.

The transfer rate of dieldrin from water to air has been measured in a wind tunnel yielding transfer velocities in the range 2.6 x 10(-5) to 1.5 x 10(-4) cm s-1. The transfer rate from air to water was measured with a wetted-wall column and gave transfer velocities in the range 9 x 10(-3) to 5 x 10(-2) cm s-1. An analysis of the data showed that processes in the liquid phase offered no larger resistance to the transfer of dieldrin between air and water than processes in the gas phase. The results are considered in relation to the transfer of dieldrin between the atmosphere and the ocean surface layer.