Potential use of cyanophyta species Oscillatoria limnetica in bioremediation of organophosphorus herbicide glyphosate

الملخص EN

One locally microalga species Oscillatoria limnetica was isolated from the artificial canal around University of Babylon in Al-Hilla city.

The isolated microalga species was cultivated in BG-11 media for biomass production and to test their ability to degrade glyphosate that is the widely used organophosphorus herbicide by high performance liquid chromotography analysis.

HPLC appeared to be an effective technique to follow decrease of glyphosate in biodegradation process.

Removal efficiencies of glyphosate were evaluated and compared.

The results confirmed the high efficiencies of O.limnetica for the removal of the target contaminant.

There were significant differences in the rate of glyphosate removal from the medium after 3, 5, 7, 14 and 35 days in all treatments.

It was 97.5 % after seven days at 5 mg / l treatment, 57.9 % and 37.1 % after fourteen days at 10 mg / l and 15 mg / l treatments, respectively and 99.9% after thirty five days at 20 mg / l treatment.

Maximum removal efficiency percentages of isolated species were increased to reach their maximum in all treatments after thirty five days.