Bioremediation of pesticide Glyphosate (Ground-UP SL) and Remove Cd, Cr elements from polluted aquatic media by using Chlorococcum humicola, Chlorella vulgaris algae

Abstract

           Within this study, the effectuality of green algae cells represented by the Chlorococcum humicola and Chlorella vulgaris species have been tested for the remediation of Glyphosate pesticide and the removal of elemental Cd and Cr from a polluted aquatic medium by using different components of pesticides and elements (25, 50, 75, 100) mg/ L (2.5, 5, 7.5, 10, 12.5, 15, 20, 25) (1, 2, 3, 4, 5) mg/L. The exposure time that is applied in the study is 3, 6, 9 and 12 days under laboratory conditions of 25 °C with lighting intensity of 3000 Lux and 16 hours lighting: 8 darkness in the middle of the static and dynamic (shaker) medium at a speed of rotation 150 rpm. The end results showed that the higher capacity of cells C. humicola algae was able to destroy the pesticide at a rate of 78.5% dynamic medium and 61.1% for the static medium compared to the C. vulgaris algae. This recorded the highest rate of the destroyed comprising of 17.7% for the dynamic medium and 15.3% for static medium. As for the results of removing heavy elements, we found that the efficiency of the first algae of Cd element recording 99.5% in the dynamic medium and 98.80% for the static medium at a concentration of 12.5 mg/L. While the Cr element was recorded with 78.7% of the dynamic medium and 76.6% for the static medium at a concentration of 1 mg/L. In retrospect, the removal results for the second algae were lower. The highest removal rate for the Cd element appeared at a concentration of 2.5 mg/L which was 86.7% for the dynamic medium and 75.7% for the static medium , whereby the Cr element was 72.7% and 71.07% for the concentration of 1 mg/L in the dynamic and static medium respectively. The conclusion of this study is that C. humicola algae can be mostly characterized by a higher capacity in order to destroy the Glyphosate pesticide as well as the removal of high concentrations of Cd compared to Cr , and with high efficiency in the dynamic medium more than the static medium in the most treated.