4.7 Article

Petroleum sludge polluted soil remediation: Integrated approach involving novel bacterial consortium and nutrient application

Journal

SCIENCE OF THE TOTAL ENVIRONMENT
Volume 763, Issue -, Pages -

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ELSEVIER
DOI: 10.1016/j.scitotenv.2020.142934

Keywords

Petroleum sludge; Seed germination; Agriculture; Vigna radiata

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Petroleum sludge, a hazardous solid waste from industrial activities in the petroleum sector, has attracted global attention for environmentally friendly and economically sound treatment. Research shows that bioremediation using hydrocarbon utilizing bacterial consortium can effectively degrade petroleum sludge and improve soil quality.
Petroleum sludge has been reported as noteworthy hazardous solid waste generated from industrial activities of petroleum sector. Environment friendly and economically sound treatment of petroleum sludge has attracted global attention worldwide and has become a thrust area of research. Petroleum sludge bioremediation is gaining interest of researchers globally to clean pollutants from soil ecosystems. To date of submission of the work there is no literature available reporting comparing five approaches for remediation of agricultural soil polluted with petroleum sludge employing hydrocarbon utilizing bacterial consortium (HUBC). Further studies on toxicity were performed through pot experiments using Vigna radiata. The aim of this research work was to compare capability of five approaches for remediating petroleum sludge polluted agricultural soil by employing soil microcosms. Best results were obtained when simultaneous application of HUBC and nutrients was performed in microcosm. Highest decrease (93.14 +/- 1.75%) of petroleum sludge with sufficient count of hydrocarbon utilizers and decreased nutrients in 42 days was reported. Quality improvement of petroleum sludge contaminated agricultural soil after its bioremediation was performed by pot experiments by checking germination of V. rcidiatct seeds. 85.71% germination of seeds in 5 days was noted for treated soil. Thus, HUBC can be applied as a bioremediating consortium to reclaim petroleum sludge polluted soil. (C) 2020 Elsevier B.V. All rights reserved.

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