Extraction of methylene blue dye from polluted waters using some bio-adsorbents.
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Date
2012-10
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Abstract
Sorbents derived from roots of Tephrosia purpurea, leaves and stems of Terminalia Arjuna and
Bivalve snail shells have been explored for their sorption abilities towards Methylene Blue using synthetically
prepared simulated waste waters. It is found that at high pHs, these bio-materials have shown strong affinity towards
Methylene Blue. The physicochemical properties such as pH, sorbent concentration and time of equilibration have
been optimized for the maximum removal of Methylene Blue from waste waters. Methodologies have been developed
to extract good quantities of the dye. The roots powder of Tephrosia Purpurea has been proved to very effective even
at 1.0 gm/500 ml of the sorption concentration at pH :8 or 10. More than 95.0% of extraction of Methylene Blue has
been found with the bark powders of Terminalia Arjuna at all pH of study viz., 2-10. Interference of Fivefold excess
of common anions and cations present in natural waters, have been studied. Anions have not interfered while Cation
like Ca2+, Mg2+ and Cu2+ have shown some interference but Fe2+ and Zn2+ have synergistically maintained the
maximum extraction of the dye. The procedures developed have been successfully applied to some industrial effluent.
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Keywords
Methylene Blue, pollution control, bio-adsorbents, applications
Citation
Reddy B Srinivasa, Ramana K Venkata, Ravindhranath K. Extraction of methylene blue dye from polluted waters using some bio-adsorbents. International Journal of Applied Biology and Pharmaceutical Technology. 2012 Oct-Dec; 3(4): 215-224.