Authors : Ali Saberi, Mohammadreza Taherizadeh and Fatemeh Lavajoo
Abstract: The impact of different concentrations (5, 50, 250, 500 ppm) of the Magnesium (Mg), tin (Sn), Cadmium (Cd), Iron (Fe) and Zinc (Zn) on the growth of Chlorella vulgaris was studied during 15d exposure experiments. The results showed that the effects of these five metals on the growth of Chlorella vulgaris were dependent on both concentration and exposure time. It was found that 50 ppm treatments of Sn, Cd and Fe significantly inhibited the growth of Chlorella vulgaris and the effect became weaker and reached to lethal stages with an increase in concentration. It has a good ability in treatments with up to 50 ppm of Mg and Zn. Among the five elements tested, the treatment with Mg showed maximum chlorophyll ‘a’ (9. 91±1.2 μg L–1) content than other of the elements. Therefore the lowest chlorophyll ‘a’ of 0.5±0.12 and 0.24± 0.12 μg L–1 were noticed in treatments with Sn and Fe at 250 ppm, respectively. From the all above results it could be understood that C. vulgaris can resist in low concentration of Sn, Cd and Fe and high concentration of Mg and Zn in aquatic ecosystems. Thus, it can infer that use to bioremediation of pollution water.
Ali Saberi, Mohammadreza Taherizadeh and Fatemeh Lavajoo, 2019. Effect of Different Concentration of Mg, Sn, Zn, Cd and Fe on the Growth of Chlorella vulgaris. Research Journal of Agronomy, 13: 21-28.