World Journal of Microbiology and Biotechnology

, Volume 24, Issue 1, pp 47–53

Uptake of heavy metals by Stylonychia mytilus and its possible use in decontamination of industrial wastewater

Original Paper

DOI: 10.1007/s11274-007-9436-1

Cite this article as:
Rehman, A., Shakoori, F.R. & Shakoori, A.R. World J Microbiol Biotechnol (2008) 24: 47. doi:10.1007/s11274-007-9436-1


The heavy metal resistant ciliate, Stylonychia mytilus, isolated from industrial wastewater has been shown to be potential bioremediator of contaminated wastewater. The ciliate showed tolerance against Zn2+ (30 μg/mL), Hg2+ (16 μg/mL) and Ni2+ (16 μg/mL). The metal ions slowed down the growth of the ciliate as compared with the culture grown without metal stress. The reduction in cell population was 46% for Cd2+, 38% for Hg2+, 23% for Zn2+, 39% for Cu2+ and 51% for Ni2+ after 8 days of metal stress. S. mytilus reduced 91% of Cd2+, 90% of Hg2+ and 98% of Zn2+ from the medium after 96 h of incubation in a culture medium containing 10 μg/mL of the respective metal ions. Besides this, the ciliate could also remove 88% of Cu2+ and 73% Ni2+ from the medium containing 5 μg/mL of each metal after 96 h. The ability of Stylonychia to take up variety of heavy metals from the medium could be exploited for metal detoxification and environmental clean-up operations.


Heavy metal resistanceHeavy metal uptakeBioremediationStylonychia mytilusHeavy metal resistant ciliate

Copyright information

© Springer Science+Business Media B.V. 2007

Authors and Affiliations

  • A. Rehman
    • 1
  • Farah R. Shakoori
    • 3
  • A. R. Shakoori
    • 2
  1. 1.Department of Microbiology and Molecular GeneticsUniversity of the PunjabLahorePakistan
  2. 2.School of Biological SciencesUniversity of the PunjabLahorePakistan
  3. 3.Department of ZoologyGovernment College UniversityLahorePakistan