Home|Journals|Articles by Year|Audio Abstracts
 

Original Research

Egypt. J. Exp. Biol. (Bot.). 2009; 5(0): 215-219


HEAVY METALS REMOVAL BY MARINE SULFATE REDUCING BACTERIA

Manal M. El-Naggar.




Abstract

Sulfate reducing bacteria (SRB) was isolated from marine sediment of Sidi Kerir, Alexandria and selected according to its high tolerance to different heavy metals (Cd2+, Pb2+ and Hg2+), Zn2+ and Cu2+ ions showed high inhibitory effect on the SRB. The results showed that more resistance towards these examined heavy metals was achieved on adjusting the culture medium of SRB at pH 7 and 30˚C and it depends on the type of metal. The minimum inhibitory concentration (MIC) of each heavy metal was determined and the SRB heavy metal tolerance showed a descending order from Hg2+ , Pb2+ , Cd2 , Zn2+ then +Cu2+ ions. Moreover, the tested metals affected the specific growth rate and the total cell protein of the SRB. The obtained results indicated that marine SRB has a high tolerance level (500µM) towards the most toxic heavy metals (Hg2+ and Cd2+ ions) and it is promising to be used in removing not only mercury but also cadmium ions from marine environments.

Key words: SRB, heavy metal, tolerance, marine, Hg2+, Cu2+.






Full-text options


Share this Article


Online Article Submission
• ejmanager.com




ejPort - eJManager.com
Refer & Earn
JournalList
About BiblioMed
License Information
Terms & Conditions
Privacy Policy
Contact Us

The articles in Bibliomed are open access articles licensed under Creative Commons Attribution 4.0 International License (CC BY), which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.