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Paper Information

Journal:   IRANIAN JOURNAL OF PUBLIC HEALTH   AUGUST 2014 , Volume 43 , Number SUPPLEMENT 2; Page(s) 51 To 51.
 
Paper: 

MALATHION BIODEGRADATION BY ISOLATED BACTERIA FROM ARVANDKENAR CONTAMINATED SOIL

 
 
Author(s):  NADALIAN BANAFSHEH*, EBRAHIMIPOUR GHOLAMHOSSEIN, SHAHRIARI MOGHADAM MOHSEN, NADALIAN BAHAREH
 
* DEPARTMENT OF MICROBIOLOGY, FACULTY OF BIOLOGICAL SCIENCE, SHAHID BEHESHTI UNIVERSITY, TEHRAN, IRAN
 
Abstract: 

Background: Malathion is one of the organophosphorus insecticides which has a wide variety of applications in the agriculture industry. Its harmful toxic effects on animals range from invertebrates to vertebrates including human. Malathion can be degraded using physical, chemical or biological methods. Bioremediation is effective when compared to the other methods and applicable for insitu bioremediation. Present study reports the isolation, morphological and biochemical analysis of malathion degrading bacteria isolated from Arvandkenar contaminated soil.
Methods: Malathion degrading bacteria were isolated from Arvandkenar contaminated soil by serial dilutions of enriched consortium. In order to assess the utilization rates of Malathion using the isolated strains, microbial inoculums were passed to the mineral salt medium with malathion (2 ml/l) as the sole carbon and energy source. The efficiency of isolated strains was assessed by monitoring the malathion biodegradation (using GC- FID). The experimental cultures were performed at 35oC at 130 rpm for 7 days.
Results: Results showed that, among the isolated strains, BNA1 had the highest malathion biodegradation abilities (22.00%) in comparison to other isolated strains. This strain was short rod-shaped, forming cream colonies (on nutrient agar medium), gram negative, oxidase negative and catalase positive.
Conclusion: Isolated bacteria from Arvandkenar contaminated soil have the potential to degrade malathion. Also successful biodegradation efficiency of the isolated strain may be accomplished during the process of optimization.

 
Keyword(s): ORGANOPHOSPHORUS, BIODEGRADATION, BACTERIA
 
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