The effects Pollution of Lead Heavy Metals contamination on the Antioxidant Activity of microalgae Spirulina Platensis

Document Type : scientific research article

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Abstract

Heavy metals are the most important environmental pollution, which are resistant in nature. Increasing levels of heavy metals in aquatic environments has biochemical and physiological negative effects on microalgae. Microalgae increase the antioxidant content in order to protect cells from stress conditions. Probably, heavy metals cause to creating oxidative stress by producing free radical stress. This various forms reacts with lipids and will cause of lipid peroxidation, membrane damage and inactivation of enzymes; so cell life will be compromise. In this study, effect of different concentrations of Lead (5, 10, 30, 50 and 100 micrograms per liter) on the antioxidant activity, Phenolic and flavonoid content of Spirulina Platensis microalgae methanol extract was studied in a period of 8 days. High performance of Phenolic compounds, especially Phenolic acids and Flavonoids in creating ant oxidative properties is important. Estimation of antioxidant activity according to DPPH method, indicated that the compounds levels of Phenolic and Flavonoid have been increased by the microalgae in order to coping with effects of heavy metals oxidative; and the highest antioxidant activity was seen at the last days of estimation. Also, assessing the special rate of growth showed that the highest rate is belong to the control group. In addition, by increasing the Lead concentration, the growth rate had more decreased.

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Journal of Utilization and Cultivation of Aquatics
Volume 7, Issue 4
March 2019
Pages 1-8

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