a 

 □ 

 □ 



20 



10 



EL 



.-•• 



PI 



•■■ 



-■■' 

 -•■' 



/ 

 / 

 / 

 / 

 / 

 / 

 / 

 / 

 / 

 / 

 / 

 ,-■ 



.■■' 



,-■ 

 ,-■ 

 / 



/ 



/ 



BaP N 



K 



Ac 



JZL 



R 



-■•■ 

 .••■■ 



Pn 



Bba BaA TF Chr 



^A 



Y\ B B B ^ 



/ 

 / 

 / 

 / 

 / 

 / 



/ 



/ 

 / 

 / 

 .-- 

 .-- 

 / 

 / 

 / 

 / 

 / 



J 



PI 



5 



C PAH 



/ 

 / 



/ 

 / 



- 3 



Pv 



Per BacA BajA BahA BeP Cor BkF BbF 



Fig. 6. Relative rates (v) of photoinitialed transformation of PAH's in water: (1 ) (Paalme etal., 1983); and their content (ng/1) in the water of the Bering Sea; 

 (2); and the Baltic; and (3) (Kirso el at.. 1989). 



Thus, under conditions similar to natural ones (i.e., under 

 sunlight), it has been shown that a certain amount of PAH's 

 may be subjected to sunlight photolysis. The degree of BaP 

 transformation in the experiments was governed by the intensity 



of total sunlight irradiation in a given region and by the 

 conditions of exposure (temperature, turbidity, etc.). 

 Autoxidation plays an insignificant role in self-purification of 

 the marine environment from BaP. 



201 



