Donnish Journal of Microbiology and Biotechnology Research

January 2017 Vol. 4(1), pp. 001-003

Copyright © 2017 Donnish Journals

Short Communication

Activity Assay of Local Bacterial Culture in Biological Treatment of Organochloropesticides

Eman H. Qatie*, Ansam S. Sabie, Nibras M. Al-hasani, Alia F. Hachim, and Shahlaa K. Fartos

Ministry of Science and Technology, Environment and Water Directorate, Iraq.

Corresponding Author's Email: eman77aa@yahoo.com

Accepted 9th January, 2017.

Abstract

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The present study examined the efficacy of bacterial isolates as mixed culture to remove pesticide residues in situ. Pesticides are mostly non-selective, widespread applied, possess toxic properties, and in some cases are very refractory. These features entitle pesticide to be one of the most fearful group of substances, as far as biological communities and humans are concerned. The search aims to elaborate the potential application of bacterial isolates in decontamination of agricultural soils, which have been polluted with doses of pesticides (propachlor) through the process of biodegradation. Degradation rates of five concentrations of pesticides were studied. Changes in depth were probably caused by interactive effects of changes in soil microbial activities and in organic matter content (and thus pesticides sorption) in the different soil layers. Results showed that the concentration of pesticide introduced into the soil drastically affected the growth phase of the soil microbes), which increased from 9*10⁶ cfu/g in the control soil to 6*10⁸ cfu/g in the pesticide-contaminated soil after two weeks of incubation, but subsequently decrease to 7*10³ cfu/g on the last week. The rate of biodegradation was faster within the first two weeks, result recording 88% reduction in pesticide residue.

Keywords: Chlorinated organ pesticides, Biodegradation, Bacteria, Soil.

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Cite This Article:

Eman H. Qatie, Ansam S. Sabie, Nibras M. Al-hasani, Alia F. Hachim, and Shahlaa K. Fartos. Activity Assay of Local Bacterial Culture in Biological Treatment of Organochloropesticides. Donnish Journal of Microbiology and Biotechnology Research 4(1) 2017 pp. 001-003.