Table 4-2. Speciation of Trace Metals in Aquil with 

 EDTA Concentration Reduced to 10"8m. 



Major Species 



Percent of Total Metal 



1 00% 

 1 00% 



1% 



87% 

 12% 



3% 

 39% 

 42% 



6% 

 60% 



8% 



3% 



1% 

 27% 



1% 

 99% 

 87% 

 13% 

 21% 

 50% 



5% 



3% 

 20% 



1% 

 51% 

 11% 

 21% 

 15% 



2% 

 57% 



40% 



3% 



copper on some fishes (31), and for cadmium on a grass shrimp (45). Although 

 there has been no experiment reported to date that provides direct evidence for 

 the importance of inorganic complexation in controlling metal toxicity to 

 phytoplankton, this result can be inferred from data with these other 

 organisms, and from the general demonstration that metal ion activities are the 

 important parameters of toxicity to algae. 



43 



