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Heavy metal resistant freshwater ciliate, Euplotes mutabilis, isolated from industrial effluents has potential to decontaminate wastewater of toxic metals by Abdul Rehman; Farah Rauf Shakoori; Abdul Rauf Shakoori is a Engineering article available to read on EtoBox.

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The ciliate, Euplotes mutabilis, isolated from industrial wastewater of tanneries of Kasur, Pakistan, showed tolerance against Cd 2+ (22 lg ml À1 ), Cr 6+ (60 lg ml À1 ), Pb 2+ (75 lg ml À1 ) and Cu 2+ (22 lg ml À1 ). The heavy metals, Cr and Pb, were randomly selected for determining the capability of the ciliate to reduce the concentration of these metal ions in the medium and to evaluate its potential use as bioremediator of wastewater. The live protozoans could remove 97% of Pb 2+ and 98% of Cr 6+ from the medium, 96 h after inoculation of the medium containing 10 lg ml À1 of metal ions. The acid digestion of ciliate showed 89% of Pb 2+ and 93% of Cr 6+ ions accumulated in the organism. When the ciliate was exposed to heavy metals at a larger scale viz., 10 l of water containing 10 lg ml À1 of heavy metals, it removed 86% of Pb 2+ and 90% of Cr 6+ from the medium. The metal uptake ability of E. mutabilis, as evidenced by its survival and growth in 100 ml and 10 l of water containing 10 lg ml À1 of metal ions, reduction in the concentration of heavy metals in the medium and its increased uptake by the live cells, and no metal uptake by the heat killed ciliate can be exploited fo

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Author

Abdul Rehman; Farah Rauf Shakoori; Abdul Rauf Shakoori

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0960-8524)

Published

2008

Language

EN

Field

Engineering (Physical Sciences)