[b] Heavy Metal Resistance in Bacteria Isolated from Contaminated and Uncontaminated Soils[/b]
Journal Title: International Journal of Research in Chemistry and Environment (IJRCE) - Year 2011, Vol 1, Issue 1
Abstract
The general tolerance levels of heterotrophic bacterial populations to one or more metals can be determined by assessing their resistance to such metals. Soil bacterial communities from one uncontaminated and one metal impacted soil were analyzed to determine their resistance to some heavy metals by plating media amended with different concentrations of the metal ions. It was found that the metal-contaminated soil communities were more resistant than the uncontaminated community. In addition, the highest minimum inhibitory concentration (MIC) of more than 1000 µg/mlwas observed against Pb2+ in 25% and 15% of the isolates in the contaminated and uncontaminated soils, respectively. On the other hand, the MIC for Cu2+ and Cr6+ ranged between 200 and 600 µg/ml. Most bacterial isolates from the soil were resistant to very high concentrations of heavy metals regardless of the level of metal concentrations in their environment. It is proposed that the resistance ability of the isolates could be exploited in considering the isolates as possible candidates for the decontamination of metal-polluted sites. The most predominant isolates at high concentrations of the metal ions include Bacillus spp., Pseudomonas spp., Corynebacterium spp., Micrococcus spp. and Flavobacterium spp.
Authors and Affiliations
Anyanwu C. U. , Nwachukwu O. N.
Keywords
Related Articles
- EP ID EP93278
- DOI -
- Views 121
- Downloads 0
Ecto and Endo parasites in Labeo rohita, Major carp (Hamilton) In Krishna River segment in Sangli district
Fishes are the staple food for many in coastal region of India, including Maharashtra. Krishna River in Sangli District is one of the rich sources of freshwater fishes. The river situated in Latitude16° 51' 26....
[b] Comparative Analysis of the Thermodynamics and Adsorption Isotherms for the Adsorption of Some Metal Ions from aqueous solution using Sawdust Material[/b]
[i]The experimental results of the thermodynamic and adsorption isotherms of best fit for the adsorption of Cr(VI), Ni(II), Fe(II) and Cd(II) from aqueous solution onto Sawdust were studied. Adsorption experiments...
Comparison of Viscosities of Biodiesel from Pork Lard and Soybean Oil and Blends with Petroleum Diesel
Viscosity is an important fuel property of biodiesel and fossil diesel fuels. Animal fats and vegetable oils can be used as alternative fuels directly but they have a major drawback because of their high viscosity values...
Clay Intercalation Compound: Chromium Removal Study
The present work investigates the influence of intercalated clay compounds of montmorillonite and bentonite on adsorption of total chromium in aqueous medium and comparison of the adsorption capacities of both. The prese...
Production of Xylanase by Aspergillus flavus FPDN1 on Pearl millet bran: Optimization of Culture Conditions and Application in Bioethanol Production
The production of extracellular xylanase by a locally isolated strain of Aspergillus flavus FPDN1 was studied for optimization of cultural conditions and saccharification followed by bioethanol production. Among the v...