The application of biosurfactant producing bacterial consortium as a petroleum degrader in increasing the hydraulic conductivity coefficient of TPH-contaminated soil

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Zeynali Komeil; Shariati Shayan; Pourbabaei Ahmad Ali; SHORAFA MEDI

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Journal Paper

Paper Information

Journal: Iranian Journal of Soil and Water Research Year:2024 | Volume:55 | Issue:9 Page(s): 1585-1599

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Title

The application of biosurfactant producing bacterial consortium as a petroleum degrader in increasing the hydraulic conductivity coefficient of TPH-contaminated soil

Author(s)

Zeynali Komeil | Shariati Shayan | Pourbabaei Ahmad Ali | SHORAFA MEDI | Issue Writer Certificate

Keywords

biodegradation

biosurfactant

Crude Oil

Hydraulic conductivity

oil pollution

Abstract

Oil pollution is recognized as one of the significant threat to soil fertility and plant production. Pollution caused by petroleum hydrocarbons, reduces the Hydraulic conductivity of soils, leading to increased erosion and runoff, and decreased plant growth. One practical approach for remediating soils contaminated with petroleum hydrocarbons is using biosurfactant-producing microorganisms that can degrade these compounds. This study examined the efficacy of a microbial consortium comprising the bacterial strains Dietzia aerolata PS14B1, Kocuria salina PS12B2, and Mesobacillus harenae PS9D12 in altering the permeability coefficient of soil contaminated with high pollution (TPH). In the hydrocarbon growth and degradation test in the mineral base medium after seven days of incubation, the results showed that strains PS14B1, PS12B2, and PS9D12 were successful in reducing Total Petroleum Hydrocarbons (TPH) by 25.63%, 24.11%, and 22.83%, respectively, which was significantly different from the control (P<0.05). The inoculation of the bacterial strains into the soil and subsequent 30-day incubation demonstrated a significant increase in soil Hydraulic conductivity, from 1.18 cm h-1 to 9.12 cm h-1, compared to the control treatment (3.24 cm h-1). These findings suggest that the bacterial consortium holds potential for the sustainable remediation of oil-contaminated sites and the enhancement of soil permeability in polluted areas.

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