Effect of biosurfactant on degradation of polyaromatic hydrocarbons in different agricultural soils under different environments

Yadav, Ashwini and Singh, Neera and Bhatia, Arti and Varghese, Eldho and Banerjee, Kaushik and Khandelwal, Ashish (2025) Effect of biosurfactant on degradation of polyaromatic hydrocarbons in different agricultural soils under different environments. Current Science, 129 (1). pp. 54-62. ISSN 0011-3891

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Abstract

A lipopeptide biosurfactant isolated from Lysinibacillus sp. MW444883 and characterised using liquid chromatography-high resolution mass spectroscopy. The production of the biosurfactant was optimised under conditions of 27oC and 150 rpm (yield ∼2.65 g/l), and Oil dispersion varied from 6 to 8.5 cm. Degradation and half-life of polyaromatic hydrocarbons in inceptisol soils (collected from Delhi and Jharkhand agricultural field) under different environments (28oC and 37oC) varied for naphthalene (20.8%–100%; 1.16–9.86 days), fluorene (5.8–93.8%; 5.6–14.4 days), phenanthrene (6.0%–94.1%; 5.4–22.5 days) and pyrene (5.8%–78.7%; 10.3–27.0 days) respectively. Additionally, dehydrogenase and carbon dioxide varied from 9.6 to 45.1 µg TPF g–1 soil h–1 and 146.6 to 401.4 mg kg–1 d –1, 1 respectively, over 0–21 days.

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