Abstract
The toxicity of PCBs (Aroclor 1242) to freshwater algae was analyzed. In two closely related species of Chlorella, one was found to be extremely resistant and the other sensitive. Chlamydomonas reinhardi strains showed temporary sensitivity, which was overcome after 3 days of culture. Results from abiotic preculture indicated that in all cases enzymatic degradation or adsorption of PCBs by cells were not mechanisms explaining the observed differential sensitivities. However, adsorption of PCBs to glass surfaces, coupled with apparent differential uptake properties of the algal species studied, was shown to be the cause of the differential growth effects of PCBs on freshwater algae.
Published Version
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