Experimental log Koc values for aldrin range from 5.38 to 7.67. Based on a classification scheme, these log Koc values indicate that aldrin is expected to be immobile in soil. The mobility of Aldrin and Dieldrin in the soil environment, however, can be enhanced at hazardous waste sites where organic solvents may be present. These organic solvents have the ability to increase the water solubility of nonpolar compounds which in turn increases their mobility in soil.
Volatilization of Aldrin from soil is more rapid when it is applied to the soil surface rather than incorporated into the soil. A loss of 50% from a surface application was estimated to occur within 12 weeks after application compared to 1015 weeks for soilincorporated aldrin. The relatively rapid loss of both Aldrin and Dieldrin from soil during the first few months after application has been attributed to loss by volatilization.
Based upon a Henry's law constant, volatilization of aldrin from water surfaces is expected, however, may be attenuated by adsorption to suspended solids and sediment in the water column.
According to a model of gas/particle partitioning of semivolatile organic compounds in the atmosphere, Aldrin will exist in both the vapour and particulate phases in the ambient atmosphere. Particulatephase Aldrin may be transported through the atmosphere by wind and later removed from air by wet and dry deposition.
The preliminary indicator of potential bioaccumulation of a compound, log Kow, for Aldrin ranges from 5.68 to 7.40, indicating a high potential for bioaccumulation. Experimental evidence indicates that aldrin is rapidly metabolized to Dieldrin by some organisms, which then bioconcentrates and biomagnifies.