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.
