Biosurfactant and iron oxide nanoparticle-assisted bioremediation of soil co-contaminated with hydrocarbons and hazardous heavy metals

文献类型： 外文期刊

第一作者： Elumalai, Punniyakotti

作者： Elumalai, Punniyakotti;Gao, Xueke;Cui, Jinjie;Elumalai, Punniyakotti;Gao, Xueke;Cui, Jinjie;Rajamohan, Rajaram;Purayil, Aman Thashbin Vayal;Menon, Vishakha;Srivatsan, Ramesh Pranav;Kumar, Arunagiri Santhosh;Lakshminarayanan, Sivakumar;Mainupriya, Sritharan;Nandi, Sreya;Parthipan, Punniyakotti

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关键词： Biosurfactant; Biodegradation; Co-contamination; Heavy metals; Integrated approach

期刊名称：CHEMICAL ENGINEERING JOURNAL （ 影响因子：13.3； 五年影响因子：13.2 ）

ISSN： 1385-8947

年卷期： 2024 年 497 卷

页码：

收录情况： SCI

摘要： The innate resources of water and land are polluted by hydrocarbons, heavy metals, and other organic/inorganic compounds, and pollutants have become a significant concern because of their persistent and hydrophobic nature in the environment. In this study, two effective biosurfactant-producing indigenous bacterial strains, Bacillus subtilis strain R6 and Paenibacillus dendritiformis strain S2, were selected based on screening tests. First, we targeted the biodegradation of crude oil (C9-C30 9 -C 30 hydrocarbons) by the bacterial strains in a mineral salt medium under optimal conditions for 15 days. The results revealed that both strains obtained approximately 97 % degradation efficiency. Simultaneously, iron oxide nanoparticles with a size of 10 nm were green synthesized using Aerva lanata flower extract and confirmed with different spectroscopic and microscopic techniques. Furthermore, the bioremediation of soil co-contaminated with crude oil and heavy metals was performed using a mixed consortium of B. subtilis strain R6 and P. dendritiformis strain S2, iron oxide nanoparticles (1 and 2 g/kg), and a biosurfactant under optimal conditions. Toxicity assessments were performed by growing Vigna radiata in the bioremediated soil. Significant bioremediation efficiencies were observed in the biosurfactant and iron oxide nanoparticle-added systems, reaching a maximum efficiency of 99% in system VII. This integrated approach can be used for the practical treatment of co-contaminated environments.

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