Phycoremediation of PALLAS 45® OD herbicide by two algal spe-cies Coelastrella oocystiformis (Chlolrophyceae) and Klisinemaper-sicum (Cyanophyceae)

ABSTRACT The present study aimed at evaluating the efficiency of two species of algae Coelastrella oocystiformis (Chlolrophyceae) and Klisinemapersicum (Cyanophyceae) to bio remediate the herbicide PALLAS 45® OD. Removal percentage R.P, Catalase CAT and Superoxide dismutase SOD enzymes, pH and electrical conductivity EC were the main parameters to measured bioremediation efficiency after incubation of studied algae at optimal growth condition in suitable culture media for each algae. Three concentrations of PALLAS 45® OD herbicide were tested (0.0,125,250 and 500)mg/l for 15 days experiments. The results showed that C. oocystiformis had R. Pof 99%at 10 days of exposure, while K. persicum had R.Pof 75.5% at the end of experiment. Slightly alternation of pH culture media after treatment ,as same as E.C .on the other hand SOD enzyme activity reaches highest levels after 10 hrs. and 10 days for both tested algae at conc. Of 125 and 250 mg/lof experiment,while CAT enzyme reached its higher activity after 24 hrs.at conc.500mg/l and after 10 days at conc. 250 mg/l for K. persicum, while higher CAT activity were recorded at conc.125 mg/l after 10 days of exposure for C. oocystiformis .the results of this study exhibit the high efficiency of tested algae to bioremediate the herbicide PALLAS 45® OD with promising new approach of biotechnology of bioremediation.Keywords: Chlorophyceae, Cyanophyceae, Klisinema persicum, Coelastralla oocystiformi