Microbial Diversity of Soils Contaminated with Persistent Organic Pollutants and POP-Degrading Strains
Malik A. Abdieva G. Ualieva P.
May 2023Institute for Ionics
Water, Air, and Soil Pollution
2023#234Issue 5
The current study aimed to address gaps in general understanding of the biodegradation of persistent organic pollutants. POP-contaminated soils were collected from the vicinity of former obsolete pesticide storage facilities in four villages, namely, Amangeldy, Belbulak, Beskainar, and Kyzylkairat, in Talgar district, Almaty region, Kazakhstan. The study soils were heavily contaminated with 24 organochlorine pesticides, 15 of which belong to POPs. Microbial diversity assessment allowed the isolation of 40 strains, which were analyzed for their potential to degrade 4.4-DDE, 4.4-DDT, α-HCH, β-HCH, and γ-HCH. Pseudomonas plecoglossicida K2 (OK217230), Bacillus aryabhattai K3 (MW866565), Solibacillus isronensis KS1 (OK236011), Pseudomonas sp. KS2 (OL348382), Bacillus pumilus B1 (OL348383), Bacillus amyloliquefaciens B2 (OL348394), Bacillus subtilis AK5 (MW866566), Pseudomonas koreensis AK1 (OL348403), Bacillus megaterium AS1 (OL348404), and Bacillus paramycoides SA1 (OL348439) effectively degraded POP-pesticides. Promising elimination was observed for a consortium Pseudomonas plecoglossicida K2 and Bacillus aryabhattai K3, with the highest degradation activity of 52.9 and 31.9% for 4.4-DDT and γ-HCH, respectively, and a single strain Bacillus aryabhattai K3, with a degradation rate of 55.2, 13.8, and 25.7% for 4.4-DDE and α- and β-isomers, respectively.
Bioremediation , POP-degrading strains , POP-pesticides , Soil contamination
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Faculty of Biology and Biotechnology, Al-Farabi Kazakh National University, Al-Farabi 71, Almaty, 050038, Kazakhstan
Faculty of Biology and Biotechnology
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