CORRELATION BETWEEN C-6/C-14 CHLORINATED HYDROCARBONS LEVELS IN THE VEGETATION AND IN THE BOUNDARY-LAYER OF THE TROPOSPHERE

The concentration of 12 semivolatile organochlorine compounds-SOC-[hexachlorobenzene, alpha-hexachlorocyclohexane, gamma-hexachlorocyclohexane, 4,4'-DDT, 4,4'-DDE, and 7 polychlorinated biphenyl congeners (PCB 28 (2,4,4'-Cl3B), PCB 52 (2,2',5,5'-Cl4B), PCB 101 (2,2',4,5,5'-Cl5B), PCB 118 (2,3',4,4',5-Cl5B), PCB 138 (2,2',3,4,4',5'-Cl6B), PCB 153 (2,2',4,4',5,5-Cl6B), PCB 180 (2,2',3,4,4',5,5'-Cl7B)]-has been measured in moss, lichen, and foliage samples collected near Ulm (south Germany). These values are compared with air measurements reported for the same region. The bioconcentration factors vegetation/air (BCF) obtained in this way are compared with those reported from both environmental and laboratory studies. Some of the latter are used to calculate mean concentrations of SOC in air which are in agreement with direct air measurements.