Effect of rhamnolipid on biodegradation of hydrocarbons in non-aqueous-phase liquid (NAPL)

Mariaamalraj, S; Pasumarthi, Rajesh; Achary, Anant; Mutnuri, Srikanth

doi:10.1080/10889868.2016.1212807

Cited by 10 publications

(5 citation statements)

References 28 publications

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“…They indicated that the hydrocarbons bioavailability reduction may be caused by blocking the effect of rhamnolipid molecule layer at the organic-water interface. However, the rhamnolipids can modify cell surface hydrophobicity and as a result enhance the biodegradation of non-aqueous pollutants [42].…”

Section: Discussionmentioning

confidence: 99%

Surfactant addition in diesel oil degradation – how can it help the microbes?

Zdarta

Smułek

Pacholak

et al. 2020

J Environ Health Sci Engineer

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Purpose Despite wide research on bioremediation of hydrocarbon-contaminated soil, the mechanisms of surfactant-enhanced bioavailability of the contaminants are still unclear. The presented study was focused on the in-depth description of relationships between hydrocarbons, bacteria, and surfactants. In order to that, the biodegradation experiments and cell viability measurements were conducted, and the properties of cell surface were characterized. Methods MTT assay was employed to measure plant extracts toxicity to microbes. Then, membrane permeability changes were evaluated, followed by diesel oil biodegradation in the presence of surfactants measurements by GCxGC-TOFMS and PCR-RAPD analysis. Results Our study undoubtedly proves that different surfactants promote assimilation of different groups of hydrocarbons and modify cell surface properties in different ways. Increased biodegradation of diesel oil was observed when cultures with Acinetobacter calcoaceticus M1B were supplemented with Saponaria officinalis and Verbascum nigrum extracts. Interestingly, these surfactants exhibit different influences on cell surface properties and their viability in contrast to the other surfactants. Moreover, the preliminary analyses have shown changes in the genome caused by exposure to surfactants. Conclusions The results indicated that the benefits of surfactant use may be related to deep modification at the omics level, not only that of cell surface properties and confirms the complexity of the interactions between bacterial cells, pollutants and surfactants.

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Section: Discussionmentioning

confidence: 99%

Surfactant addition in diesel oil degradation – how can it help the microbes?

Zdarta

Smułek

Pacholak

et al. 2020

J Environ Health Sci Engineer

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“…According upon how the substrate is presented, the biodegradation process's effectiveness and the specific mode of action of rhamnolipid may change (Chebbi et al, 2022). In this way, the researchers discovered that when hexadecane was trapped in matrices with pore-sizes larger than 300 nm, as opposed to matrices with lower pore-sizes or in sea sand, rhamnolipid and a number of other surfactants enhanced the degradation of hexadecane to a greater extent (Mariaamalraj et al, 2016). State that surfactants can only accelerate hydrocarbon the decomposition in situations when the process confronts rate limitation.…”

Section: Application On Bioremediationmentioning

confidence: 99%

The Multifaceted Role of Microbial Biosurfactants in Various Fields

2024

IJFMR

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This review paper aims to explore the multifaceted roles and applications of microbial surfactants, also known as biosurfactants. These amphiphilic compounds, synthesized by various microorganisms such as Acinetobacter sp., Bacillus sp., Candida antarctica, and Pseudomonas aeruginosa, exhibit both hydrophobic and hydrophilic properties. Through lowering surface tension and interfacial tension, biosurfactants facilitate fluid phase aggregation, imparting organisms with unique physiological and ecological advantages. The synthesis of biosurfactants in bacteria not only contributes to antimicrobial activity but also enhances substrate availability for cellular absorption, particularly in challenging environmental conditions. Categorized based on molecular weight and chemical composition, biosurfactants offer numerous benefits including biodegradability, reduced toxicity, and versatile applications in agriculture, detergent production, biopesticides, and microbial oil enhancement processes. This review synthesizes current knowledge on microbial surfactants, elucidating their diverse roles and promising applications across various industries.

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“…A viable alternative may be to introduce or attempt to favor microbes that produce biosurfactants in situ. Such bacterial preparations are commercially available and have been used with some success (Mariaamalraj et al, 2016).…”

Section: The Challenge Of Non-aqueous Phase Liquidsmentioning

confidence: 99%

Bioremediation of contaminated soil and groundwater by in situ biostimulation

Romantschuk,

Lahti-Leikas,

Kontro

et al. 2023

Front. Microbiol.

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Bioremediation by in situ biostimulation is an attractive alternative to excavation of contaminated soil. Many in situ remediation methods have been tested with some success; however, due to highly variable results in realistic field conditions, they have not been implemented as widely as they might deserve. To ensure success, methods should be validated under site-analogous conditions before full scale use, which requires expertise and local knowledge by the implementers. The focus here is on indigenous microbial degraders and evaluation of their performance. Identifying and removing biodegradation bottlenecks for degradation of organic pollutants is essential. Limiting factors commonly include: lack of oxygen or alternative electron acceptors, low temperature, and lack of essential nutrients. Additional factors: the bioavailability of the contaminating compound, pH, distribution of the contaminant, and soil structure and moisture, and in some cases, lack of degradation potential which may be amended with bioaugmentation. Methods to remove these bottlenecks are discussed. Implementers should also be prepared to combine methods or use them in sequence. Chemical/physical means may be used to enhance biostimulation. The review also suggests tools for assessing sustainability, life cycle assessment, and risk assessment. To help entrepreneurs, decision makers, and methods developers in the future, we suggest founding a database for otherwise seldom reported unsuccessful interventions, as well as the potential for artificial intelligence (AI) to assist in site evaluation and decision-making.

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Effect of rhamnolipid on biodegradation of hydrocarbons in non-aqueous-phase liquid (NAPL)

Cited by 10 publications

References 28 publications

Surfactant addition in diesel oil degradation – how can it help the microbes?

Surfactant addition in diesel oil degradation – how can it help the microbes?

The Multifaceted Role of Microbial Biosurfactants in Various Fields

Bioremediation of contaminated soil and groundwater by in situ biostimulation

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