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Qom Univ Med Sci J 2013, 7(1): 11-17 Back to browse issues page
Determination of Abundance of Tellurite-Resistant Bacteria and the Ability of Remove of them from Qom Province Industrial Wastewater, Qom, Iran
Mohammad-Reza Zolfaghari 1, Mahboubeh Soleimani Sasani2
1- Islamic Azad University, Qom Branch , mreza.zolfaghary@gmail.com
2- Islamic Azad University, Qom Branch
Abstract:   (2891 Views)

Background and Objectives: Accumulation of toxic oxyanion of potassium tellurite, which has increased in the environment due to industrial activities, can cause complications in human, such as skin irritation, dermatitis, anorexia, tremor, nausea, vomiting, nervous system stimulation, convulsion, and respiratory arrest. The purpose of this research was to isolate tellurite-resistant bacteria, determine the minimum inhibitory concentration (MIC), and evaluate bioreduction of tellurite in strains.   Methods: MIC was measured by agar dilution method in 84 resistant strains isolated from wastewater. QWTm 6 strain with tolerance of tellurite concentration of 6684μg/ml was selected as superior strain. Toleration of this level of tellurite has not been reported yet.   Results: According to biochemical, phenotypic, and physiological characteristics, QWTm 6 was initially classified into Staphylococcus genus. Using the spectrophotometric technique and DDTC reagent (A 340nm & sodium diethyldithiocarbamate trihydrate), maximum elimination was seen in 0.4mM concentration of potassium tellurite in 24 hours. The strain showed high ability in the elimination of toxic oxyanion of potassium tellurite under a wide range of factors such as pH=(5-11), temperature (15-50 ◦ C), blender speed (50, 100, 150, and 200rpm), various oxyanion concentrations (0.04-1mM), and different percentages of NaCl (0-20%). This strain was also resistant to penicillin, cefixime, tetracycline, chloramphenicol, streptomycin, neomycin, erythromycin, gentamicin, kanamycin, norfloxacin, and ciprofloxacin.   Conclusion: The results of this study showed that QWTm 6 could be introduced in the international societies as an acceptable candidate for bioremediation, because of its high ability in removal and reduction of potassium tellurite.

Keywords: Oxianion, Tellurous acide, Biodegradation, Environmental.
Full-Text [PDF 220 kb]   (527 Downloads)    
Type of Study: Original Article |
Received: 2016/02/13 | Accepted: 2016/02/23 | Published: 2016/02/23
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Zolfaghari M, Soleimani Sasani M. Determination of Abundance of Tellurite-Resistant Bacteria and the Ability of Remove of them from Qom Province Industrial Wastewater, Qom, Iran. Qom Univ Med Sci J. 2013; 7 (1) :11-17
URL: http://journal.muq.ac.ir/article-1-132-en.html


Volume 7, Issue 1 (4-2013) Back to browse issues page
مجله دانشگاه علوم پزشکی قم Qom University of Medical Sciences Journal
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