Combination of Pseudomonas aeruginosa and Rhamnolipid for Bioremediation of Soil Contaminated with Waste Lubricant Oil

IF 1 4区 生物学 Q4 BIOTECHNOLOGY & APPLIED MICROBIOLOGY Applied Biochemistry and Microbiology Pub Date : 2024-06-10 DOI:10.1134/S0003683823603232
P. R. M. Lopes, R. N. Montagnolli, G. Dilarri, C. R. Mendes, J. M. Cruz, M. P. Bergamini-Lopes, B. R. A. Moreira, J. Contiero, E. D. Bidoia
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Abstract

Lubricant oils are largely responsible for environmental contamination and surfactants can hopefully improve the bioremediation process in soils contaminated with this kind of waste. However, to date only a few studies have elucidated how different surfactants affect the bioremediation process in oil-contaminated soils using the bioaugmentation technique. Thus, this study aimed to compare the effects of surfactants on the bioremediation process of waste lubricant oil in soil in association or not with bioaugmentation. Three biostimulating agents were tested: a chemical detergent, a synthetic surfactant, and a biosurfactant (rhamnolipid). The bioaugmentation process with Pseudomonas aeruginosa showed a faster biodegradation activity with total biodegradation on 181 day after application. The biosurfactant increased the number of microbial and fungal colonies leading to high biodegradation levels and a quicker treatment with or without the bioaugmentation. Bioaugmentation associated with biosurfactant reached 30.43 mg of CO2 of production on 181 day (90% of total biodegradation of waste lubricant oil) and reduced soil toxicity to 30%. Therefore, results showed that the association of biosurfactant and bioaugmentation with P. aeruginosa represents an ecologically viable strategy for bioremediation of soils contaminated with waste lubricant oil.

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结合铜绿假单胞菌和鼠李糖脂对受废润滑油污染的土壤进行生物修复
润滑油是造成环境污染的主要原因,而表面活性剂有望改善受此类废物污染的土壤的生物修复过程。然而,迄今为止,只有少数研究阐明了不同的表面活性剂如何利用生物增量技术影响油污染土壤的生物修复过程。因此,本研究旨在比较表面活性剂对土壤中废润滑油的生物修复过程的影响,以及是否与生物增强技术结合使用。本研究测试了三种生物刺激剂:化学洗涤剂、合成表面活性剂和生物表面活性剂(鼠李糖脂)。使用铜绿假单胞菌的生物增强过程显示出更快的生物降解活性,在施用后 181 天就能完全生物降解。生物表面活性剂增加了微生物和真菌菌落的数量,从而提高了生物降解水平,无论是否使用生物增强剂,处理速度都更快。与生物表面活性剂结合使用的生物增量在 181 天内达到 30.43 毫克 CO2 的产量(废润滑油生物降解总量的 90%),并将土壤毒性降低到 30%。因此,研究结果表明,将生物表面活性剂和铜绿微囊藻生物增殖结合起来,是对受废润滑油污染的土壤进行生物修复的一种生态可行的策略。
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来源期刊
Applied Biochemistry and Microbiology
Applied Biochemistry and Microbiology 生物-生物工程与应用微生物
CiteScore
1.70
自引率
12.50%
发文量
75
审稿时长
6-12 weeks
期刊介绍: Applied Biochemistry and Microbiology is an international peer reviewed journal that publishes original articles on biochemistry and microbiology that have or may have practical applications. The studies include: enzymes and mechanisms of enzymatic reactions, biosynthesis of low and high molecular physiologically active compounds; the studies of their structure and properties; biogenesis and pathways of their regulation; metabolism of producers of biologically active compounds, biocatalysis in organic synthesis, applied genetics of microorganisms, applied enzymology; protein and metabolic engineering, biochemical bases of phytoimmunity, applied aspects of biochemical and immunochemical analysis; biodegradation of xenobiotics; biosensors; biomedical research (without clinical studies). Along with experimental works, the journal publishes descriptions of novel research techniques and reviews on selected topics.
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