Effect of Oil Water-Accommodated Fraction on Growth and Chlorophyll-A of Marine Microalgae

The experiment studied the 96h acute toxicity effects on three kinds of microalgae caused by Water-Accommodated Fraction (WAF), and effects of different concentrations WAF (Platymonas helgolandicavar.tsingtaoensis,Nitzschia closteriumf.minutissima00.524816 mg/L;Isochrysis galbana00.52.551020 mg/L) on chlorophyll-a content and chlorophyll fluorescence parameters. It showed that the WAF 96h EC50of thePlatymonas helgolandicavar.tsingtaoensis,Nitzschia closteriumf.minutissima,Isochrysis galbanawere 13.84mg/L, 18.83mg/L and 6.73mg/L. The level of WAF sensitivity wasNitzschia closteriumf.minutissima>Platymonas helgolandicavar.tsingtaoensis>Isochrysis galbana. The WAF caused inhibition of chlorophyll-a content except in condition of the low concentration. It showed the higher of the WAF concentration, the stronger the inhibition.