Bio-potential application of algae in reducing the toxicity of the fly ash from coal processing: a new trend of reclamation

Authors
Nuha AI Masri

Published in
Biodiversity international Journal

Abstract 
Freshw ater algal growth inhibition test with unicellular alga Ankistmdesmns faicaоns, Scenedesmus obliquus, Selenastrum capricornutum, and Mi crocole us vaginatus is of great interest in biodiversity science. Our investigation has been made in laboratory continuous culture using sterile sewage as the medium for the start-up growth of these species. And since, these are at risk level when meet the coal industry waste, a suitable bioassay application based on an oxidizing medium of arsenic, cadmium, mercury, and selenium was implemented for algal incubation. First, the algistatic-algitidal levels were reported. Second, the observed growth inhibition with the value of IC 50 (the concentration which inhibits algae growth by 50%) was invested to obtain the growth responses and to define the range of the studied elemental variations. Noticeably, the median EC5O of the scrubber ash slurry extract (SASE) was 3-15%. Further, the results showed that the toxicity of the heavy metals depends on their chemical speciation and can be related to their free ion activities and their concentrations.

Keywords:

toxicity, fly ash, Microcoleus vaginatus, oxidizing medium, EC5O, ecosystem

Links

medcraveonline.com/BIJ/BIJ-02-00062.pdf