Bioremediation of Crystal Violet and Malachite Green Dyes by Some Algal Species | ||||
| Egyptian Journal of Botany | ||||
| Article 2, Volume 55, Issue 2, April 2015, Page 187-196 PDF (489.17 K) | ||||
| Document Type: Regular issue (Original Article) | ||||
| DOI: 10.21608/ejbo.2015.212 | ||||
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| Abstract | ||||
| BIOLOGICAL treatment of crystal violet and malachite green using blue-green algae <i> (Nostoc sp., Microcystis aeruginosa and Oscillatoria geminata) </i> and green algae <i>(Chlorella vulgaris and Scenedesmus sp.) </i> in order to assess the decolorization ability of these algae after incubation for 2 and 24 hr in three dyes concentrations at 10, 50 and 100 ppm.<i> Chlorella </i> has achieved the highest percentage of crystal violet decolorization after 2 hr at 10 ppm, but after 24 hr <i>Scenedesmus </i> gave the highest percentage of decolorization at 10 ppm. The highest proportion of malachite green decolorization after two hours using <i>Chlorella </i> at 50 ppm, but after 24 hr the higher decolorization percentage of malachite green obtained by M. aeruginosa at 100 ppm followed by Scenedesmus sp. at the same concentration. The green algae showed a high capacity for crystal violet decolorization than blue-green algae. Measuring the activity of laccase, manganese peroxidase and tyrosinase enzymes indicated that <i> Nostoc </i>sp. gave the highest laccase activity in all dyes concentrations, while the other two enzymes haven't any activity. Chlorophyll-a and phaeophytine-a values obtained showed significant differences between most treatments; the most negatively affected species was <i>O. geminata</i> which showed decreasing in chl-a content in the two dyes concentrations. In conclusion; the decolorization process of dyes by algae had been done by different mechanisms; one of them was enzymatic degradation as <i>Nostoc</i> sp. <i>C. vulgaris</i>and <i>Scenedesmus </i> sp. have a high ability to decolorize the two dyes so they might be used in wastewater treatment of fish farms contains these carcinogenic dyes as antifungal agents. | ||||
| Keywords | ||||
| bioremediation; Triphenylmethane dyes; Malachite green; Crystal Violet; Cyanophyta; chlorophyta | ||||
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