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Paper Information

Journal:   IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY TRANSACTION A- SCIENCE   WINTER 2007 , Volume 31 , Number A1; Page(s) 7 To 16.
 
Paper: 

IDENTIFICATION OF BACTERIA RESISTANT TO HEAVY METALS IN THE SOILS OF ISFAHAN PROVINCE

 
 
Author(s):  KASRA KERMANSHAHI R.*, GHAZIFARD A., TAVAKOLI A.
 
* BIOLOGY DEPT., FACULTY OF SCIENCES, UNIVERSITY OF ISFAHAN
 
Abstract: 

In recent decades, the discharge of industrial wastewater from different resources containing heavy metals has resulted in a population increase of the resistant bacteria. This problem is considerably more common in industrial areas in which the discharge of wastewater containing heavy metals into rivers has caused the heavy metals to be sorbed by soil particles (especially clay) and transfer far distances from the discharging point. The results of some studies show that, in the Zayanderood river, the concentration of heavy metals in less settlable particles such as clay, which can travel far distances down the river, is significantly higher in lower parts of the river than the upper parts. This condition shows that, there is a direct relation between the discharge of wastewater in this river and the pollution of river sediments [1, 2]. In addition, the findings of some other researchers in other parts of Iran also indicate that the rate of metal exhibition concentration (As, Ni, Cu,…) exceeds the quality guidelines for the concentration of heavy metals in sediments [3]. Since soil is one of the most important environments for microbes and is easily exposed to many pollutants, evaluating the effects of pollutants on the microbial population is very valuable. Since the resistance of bacteria depends not only on their type and environment, but also on physical factors such as the type and concentration of the substances, the microorganisms with significant resistance can reveal the condition of their environment [4, 5].

 
Keyword(s): RESISTANT, HEAVY METALS, SOILS, BACTERIA, BIOMASS
 
References: 
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