Evaluation of the toxicity of a rhamnolipid biosurfactant for its application in the optimization of the bio-electrokinetic remediation of petrochemical contaminated soil

Gidudu, Brian; Chirwa, Evans M.N.

doi:10.1016/j.clet.2022.100521

Cited by 7 publications

(3 citation statements)

References 44 publications

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“…In terrestrial ecosystems, soils are the primary receptors for a myriad of pollutants, including polymers [5][6][7], petrochemicals [8][9][10], pharmaceuticals [11], toxic metals and metalloids [12][13][14], and pesticides [15,16]. All these pollutants come mainly from industrial, agricultural, residential, and commercial activities.…”

Section: Introductionmentioning

confidence: 99%

A Review about the Mycoremediation of Soil Impacted by War-like Activities: Challenges and Gaps

Geris,

Malta,

Soares

et al. 2024

JoF

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(1) Background: The frequency and intensity of war-like activities (war, military training, and shooting ranges) worldwide cause soil pollution by metals, metalloids, explosives, radionuclides, and herbicides. Despite this environmentally worrying scenario, soil decontamination in former war zones almost always involves incineration. Nevertheless, this practice is expensive, and its efficiency is suitable only for organic pollutants. Therefore, treating soils polluted by wars requires efficient and economically viable alternatives. In this sense, this manuscript reviews the status and knowledge gaps of mycoremediation. (2) Methods: The literature review consisted of searches on ScienceDirect and Web of Science for articles (1980 to 2023) on the mycoremediation of soils containing pollutants derived from war-like activities. (3) Results: This review highlighted that mycoremediation has many successful applications for removing all pollutants of war-like activities. However, the mycoremediation of soils in former war zones and those impacted by military training and shooting ranges is still very incipient, with most applications emphasizing explosives. (4) Conclusion: The mycoremediation of soils from conflict zones is an entirely open field of research, and the main challenge is to optimize experimental conditions on a field scale.

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Section: Introductionmentioning

confidence: 99%

A Review about the Mycoremediation of Soil Impacted by War-like Activities: Challenges and Gaps

Geris,

Malta,

Soares

et al. 2024

JoF

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“…They reduce the growth rate of various microorganisms [ 13 , 14 , 15 , 16 , 17 , 18 ], activate plant immune responses [ 16 , 19 , 20 ], demonstrate lytic activity against phytopathogens [ 21 , 22 ], increase sensitivity to various drugs [ 5 , 23 ] and even have antitumor activity [ 24 ]. According to modern studies ramnolipids are non-toxic [ 25 ] or have low toxicity [ 26 , 27 ]. The combination of these qualities makes it possible to use rhamnolipids as components of drugs and their delivery systems, biocontrol agents in agriculture [ 19 , 28 ].…”

Section: Introductionmentioning

confidence: 99%

Effects of Natural Rhamnolipid Mixture on Dioleoylphosphatidylcholine Model Membrane Depending on Method of Preparation and Sterol Content

Potapov

Gordeev²,

Biktasheva³

et al. 2023

Membranes

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Rhamnolipids as biosurfactants have a potentially wide range of applications, for example, as “green” surfactants or components of drug delivery systems, which is associated with the features of their interaction with cell membranes. However, as noted in the literature, those kind of features have not been sufficiently studied now. This paper presents a study of the interaction of a natural mixture of rhamnolipids produced by bacteria of the rhizosphere zone of plants Pseudomonas aeruginosa with model membranes—liposomes based on dioleoylphosphatidylcholine (DOPC), depending on the method of their preparation and the content of sterols—ergosterol, cholesterol, lanosterol. Liposomes with rhamnolipids were prepared by two protocols: with film method from a mixture of DOPC and rhamnolipids; with film method from DOPC and injection of water solution of rhamnolipids. Joint analysis of the data of 31P NMR spectroscopy and ATR-FTIR spectroscopy showed that in the presence of rhamnolipids, the mobility of the head group of the DOPC phospholipid increases, the conformational disorder of the hydrophobic tail increases, and the degree of hydration of the C=O and P=O groups of the phospholipid decreases. It can be assumed that, when prepared from a mixture, rhamnolipids are incorporated into the membrane in the form of clusters and are located closer to the middle of the bilayer; while when prepared by injection, rhamnolipid molecules migrate into the membrane in the form of individual molecules and are located closer to the head part of phospholipids. The sterol composition of the model membrane also affects the interaction of rhamnolipids with the membrane. Here it is worth noting the possible presence of type of interaction between rhamnolipids and ergosterol differ from other investigated sterols, due to which rhamnolipid molecules are embedded in the area where ergosterol is located.

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“…Such a processes was utilised previously by Chirwa et al (2013) whereby a PAH degradation step was utilised as a clean-up step during oil recovery from storage tank sludge in batch systems. The process was recently included in an electro-osmotic oil recover study from petroleum contaminated soil in which live biosurfactant producing organisms were included in the process to recover a PAH free oil from the contaminated soil (Gidudu and Chirwa, 2019, 2020a, 2020b. The selective biodegradation ability of certain bacterial consortia have been utilised in the purification of oil separated from sludge using biosurfactants as demulsifying agents (Chirwa et al, 2013;Fayemiwo, 2015).…”

Section: Introductionmentioning

confidence: 99%

Biosurfactant assisted degradation of High Molecular Weight Polycyclic Aromatic Hydrocarbons by mixed cultures from a car service oil dump from Pretoria Central Business District (South Africa)

Chirwa

Lutsinge-Nembudani

Fayemiwo

et al. 2021

Journal of Cleaner Production

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Evaluation of the toxicity of a rhamnolipid biosurfactant for its application in the optimization of the bio-electrokinetic remediation of petrochemical contaminated soil

Cited by 7 publications

References 44 publications

A Review about the Mycoremediation of Soil Impacted by War-like Activities: Challenges and Gaps

A Review about the Mycoremediation of Soil Impacted by War-like Activities: Challenges and Gaps

Effects of Natural Rhamnolipid Mixture on Dioleoylphosphatidylcholine Model Membrane Depending on Method of Preparation and Sterol Content

Biosurfactant assisted degradation of High Molecular Weight Polycyclic Aromatic Hydrocarbons by mixed cultures from a car service oil dump from Pretoria Central Business District (South Africa)

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