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Research Article

Academia Journal of Scientific Research Research 8(4): 140-153, April 2020
DOI: 10.15413/ajsr.2020.0101
ISSN: 2315-7712
2020 Academia Publishing 

Abstract


Evaluation the toxicity of uranium to microgreen alga Scenedesmus quadricauda
 

Accepted 25th February, 2020

Islam S1, Ibrahim AH2, El-Ayouty YM3 and Maysa M1

1Nuclear Materials Authority, Egypt.
2Botany Department, Faculty of Science, Port-Said University, Egypt.
3Botany Department, Faculty of Science, Zagazig University, Egypt.

 

An experiment was conducted to evaluate the toxicity of uranium to the micro green alga Scenedesmus quadricauda. The results showed that the growth of alga was mostly decreased as compared with its corresponding control. The least reduction in the growth and growth parameters were found at 125 ppm. The other concentrations gradually decreased to the maximum reduction at the relatively high concentration (750 ppm). Also, it was found that at 125 ppm, the implementation time for complete one cycle was 4.49 h-1 and the generation time was 1.2 day-1 whereas, at 750 ppm the time required for one cycle of growth was 6.2 h-1 and the generation time was 1.4 day-1. This means that uranium toxicity delayed the growth of S. quadricauda. The results of biosynthesis of pigments showed that uranium promotes carotenoids biosynthesis rather than chl. a and b. For reducing the toxicity of uranium, the alga was trapped in alginate form and a batch of experiments that include different pH, shaking and contact time were carried out to study the ability of alga to uptake uranium. The results of alginate born alga is more efficient to remove uranium ions from aqueous solution.

Key words: Microgreen alga, uranium, Relative growth rate, generation time and number of cycling, adsorption and isotherm.
 

This is an open access article published under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Cite this article as:

Islam S, Ibrahim AH, El-Ayouty YM, Maysa M (2020). Evaluation the toxicity of uranium to microgreen alga Scenedesmus quadricauda. Acad. J. Sci. Res. 8(4): 140-153.
 

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