ENVIRONMENTAL IMPLICATIONS 



169 



10-^ 



10-^ 



o 



00 '" 



10^ 



O OBSERVED 

 • CALCULATED 



lost sensitive fish 



60 80 100 120 140 160 



MOLECULAR WEIGHT 



180 



200 



Fig. 4 48-hr LC50 values of arylamines to fish. (Data from Herbes, 

 Southworth, and Gehrs, 1977.) 



effluents. Members of this class, such as benzo(a)pyrene, are known 

 carcinogens, and levels in coal-conversion products are expected to 

 be substantially higher than in petroleum products (Shults, 1976). A 

 preponderance of the biological activity (with mutagenesis as the test 

 parameter) is associated with the PAH fraction of the liquid effluents 

 (Epler et al., 1978; Epler et al., 1977; Guerin et al., 1976). 



Data relative to the toxicity of aromatic hydrocarbons to aquatic 

 organisms are also sparse. Moore and Dwyer (1974), in a review of 

 literature on the effects of oil on marine organisms, generalized that 

 the lower the boiling point of the compound the greater the 

 toxicity and suggested that the relative toxicity might be associated 



