ArticleBiodegradation2026
Enhanced spent oil bioremediation in contaminated soils using biostimulants: kinetics, half-life, and efficacy assessment.
Article in Biodegradation, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
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Abstract
The persistence of petroleum hydrocarbons in contaminated soils remains a significant environmental concern, necessitating effective and sustainable remediation strategies. This study evaluated the potential of selected ecofriendly organic biostimulants: egusi peel (Ymp), sawdust (Sd), and cassava peel (Csp), applied individually and in combination, to enhance the biodegradation of spent oil in contaminated soil over a 180-day period under controlled microcosm conditions. Biodegradation efficiency was assessed by monitoring residual oil concentrations at regular intervals. Kinetic models (zero-, first-, second-, and third-order) were applied to describe degradation patterns and estimate rate constants. All amended treatments showed improved hydrocarbon reduction compared to the untreated control. The combination of Ymp + Sd exhibited the highest performance, with an average degradation rate of 0.269%/day and 48.42% removal, while Ymp alone also showed notable efficiency. Kinetic analysis indicated variable degradation behavior across treatments while statistical differences (p < 0.001), among treatments were observed. Complementary correlation and principal component analyses further elucidated relationships between biostimulants properties and performance. The findings demonstrated that ecofriendly agro-waste biostimulants enhanced hydrocarbon biodegradation and highlighted promising biostimulant formulations; however, further studies incorporating microbial characterization and field validation are required.
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