Jayaraman Narenkumar, Bhaskar Das, Subramani Abilaji, Kuppusamy Sathishkumar, Mohamad S AlSalhi, Sandhanasamy Devanesan, Aruliah Rajasekar, Tabarak Malik
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引用次数: 0
摘要
背景环境土壤污染是全世界人类面临的一个严重问题，因为它会导致许多疾病：本研究的重点是利用施特泽假单胞菌（P. stutzeri）NA3和蜡样芽孢杆菌（B. cereus）EN6产生的生物表面活性剂作为电解质，采用电动（EK）工艺去除污染土壤中的铬（Cr）：结果：由 P. stutzeri NA3 和 B. cereus EN6 产生的生物表面活性剂（脂肽）在 EK 过程中增加了重金属的流动性。比较了新型电解质（生物表面活性剂）与 NA3 和 EN6 生物表面活性剂在 EK 过程中的铬去除效率。EK 结果显示，在 7 天结束时，NA3 和 EN6 对铬的最大去除率分别为 75% 和 70%：讨论：生物表面活性剂有助于分解存在于土壤基质深层的重金属。元基因组学分析表明，生物表面活性剂改变了微生物群落，增强了清除重金属的能力。植物毒性试验证实，NA3 生物表面活性剂溶液的种子发芽率为 95%，可降低土壤中的有害污染物：将生物表面活性剂作为一种有效的电解质用于有害污染物的修复是一个综合过程。总之，本研究的结果表明，生物表面活性剂可作为 EK 过程中一种经济、高效的电解质，用于去除污染土壤中的铬。
Biosurfactant-assisted bio-electrokinetic enhanced remediation of heavy metal-contaminated soil.
Background: Environmental soil contamination is a serious problem for humans worldwide, as it causes many diseases.
Methods: The present study focuses on utilizing biosurfactants produced by Pseudomonas stutzeri (P. stutzeri) NA3 and Bacillus cereus (B. cereus) EN6, as an electrolyte for removing chromium (Cr) from contaminated soil using the electrokinetic (EK) process.
Results: As a result, biosurfactants produced by P. stutzeri NA3 and B. cereus EN6, being lipopeptides, increase heavy metal mobility in the EK process. The Cr removal efficiency of a novel electrolyte (biosurfactants) in the EK process was compared with that of NA3 and EN6 biosurfactants. The EK results revealed a maximum Cr removal of 75 and 70% by NA3 and EN6, respectively, at the end of 7 days.
Discussion: The biosurfactant aids in the breaking down of the heavy metals that are present deeper into the soil matrix. From the metagenomics analysis, it was identified that biosurfactant changes the microbial community with an enhanced ability to remove heavy metals. The phytotoxicity assay confirms that NA3 biosurfactant solution showed 95% seed germination and can lower hazardous pollutants in the soil.
Conclusion: The application of biosurfactants as a potent electrolyte for the remediation of hazardous pollutants is an integrated process. Overall, the results of this study suggest that biosurfactants can serve as an economic and efficient electrolyte in the EK process to remove Cr from polluted soil.
期刊介绍：
Frontiers in Microbiology is a leading journal in its field, publishing rigorously peer-reviewed research across the entire spectrum of microbiology. Field Chief Editor Martin G. Klotz at Washington State University is supported by an outstanding Editorial Board of international researchers. This multidisciplinary open-access journal is at the forefront of disseminating and communicating scientific knowledge and impactful discoveries to researchers, academics, clinicians and the public worldwide.
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