Biodegradation of n-hexadecane by Aspergillus sp. RFC-1 and its mechanism

Al‐Hawash, Adnan B.; Zhang, Jialong; Li, Shue; Liu, Jiashu; Ghalib, Hussein B.; Zhang, Xiaoyu; Ma, Fuying

doi:10.1016/j.ecoenv.2018.08.049

Cited by 36 publications

(13 citation statements)

References 58 publications

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“…Biodegradation mechanism depends on molecular-weight of hydrocarbon if that low can be directly absorbed because it is soluble and readily entered into microbial cells and need two steps 1) the intracellular accumulation of solubilized hydrocarbon and 2) the enzymatic degradation by fungi whereas microbial cells can digest medium-and long-chain hydrocarbon through three steps 1) production of biosurfactants and bioemulsifiers agents, 2) intracellular accumulation and 3) the enzymatic biodegradation [ 30 ]. The fungi produced multifunctional enzymes involved in the degradation of a large variety of aliphatic and aromatic hydrocarbons.…”

Section: Resultsmentioning

confidence: 99%

Evaluation of crude oil biodegradation using mixed fungal cultures

et al. 2021

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The use of potent fungal mixed cultures is a promising technique for the biodegradation of crude oil. Four isolates of fungi, namely, Alternaria alternata (AA-1), Aspergillus flavus (AF-3), Aspergillus terreus (AT-7), and Trichoderma harzianum (TH-5), were isolated from date palm soil in Saudi Arabia. The mixed fungal of the four isolates have a powerful tool for biodegradation up to 73.6% of crude oil (1%, w/v) in 14 days. The fungal consortium no. 15 containing the four isolates (1:1:1:1) performed significantly better as a biodegradation agent than other consortium in a variety of environmental factors containing crude oil concentration, incubation temperature, initial pH, biodegradation time and the salinity of the medium. The fungal consortium showed better performance in the biodegradation of normal alkanes (n-alkanes) than that of the polycyclic aromatic hydrocarbons (PAHs); the biodegradation efficiency of normal alkanes of the fungal consortium (67.1%) was clearly high than that of the PAHs (56.8%).

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Section: Resultsmentioning

confidence: 99%

Evaluation of crude oil biodegradation using mixed fungal cultures

et al. 2021

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“…There is a direct correlation between the cell surface hydrophobicity and its adhesion in hydrocarbon droplets, which favours emulsification and assimilation of hydrophobic substrates (Fig. 6 ) [ 197 , 198 ]. This test measures the partition of cells between the aqueous and hydrophobic phases.…”

Section: Screening Of Biosurfactant-producing Fungi: Methodologies and Characterizationmentioning

confidence: 99%

“…Biosurfactants are considered extracellular or cell membrane-associated secondary metabolites and have an ecological role similar to antibiotics and pigments that interact in membrane regulation [ 59 , 154 , 213 ]. However, some authors report that biosurfactant biosynthesis is associated with microbial growth when hydrophobic substrates are used, which indicates that these primary metabolites may also facilitate the absorption of substrates for fungi development [ 151 , 198 , 214 ]. Fungi have a more rigid and complex cell wall composition, i.e., they are more resistant to high concentrations of biosurfactants during cultivation, while bacteria have more sensitive cell structures [ 209 , 215 ].…”

Section: New Production Technologiesmentioning

confidence: 99%

Fungal biosurfactants, from nature to biotechnological product: bioprospection, production and potential applications

Silva

Banat

Giachini

et al. 2021

Bioprocess Biosyst Eng

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Biosurfactants are in demand by the global market as natural commodities that can be added to commercial products or use in environmental applications. These biomolecules reduce the surface/interfacial tension between fluid phases and exhibit superior stability to chemical surfactants under different physico-chemical conditions. Biotechnological production of biosurfactants is still emerging. Fungi are promising producers of these molecules with unique chemical structures, such as sophorolipids, mannosylerythritol lipids, cellobiose lipids, xylolipids, polyol lipids and hydrophobins. In this review, we aimed to contextualize concepts related to fungal biosurfactant production and its application in industry and the environment. Concepts related to the thermodynamic and physico-chemical properties of biosurfactants are presented, which allows detailed analysis of their structural and application. Promising niches for isolating biosurfactant-producing fungi are presented, as well as screening methodologies are discussed. Finally, strategies related to process parameters and variables, simultaneous production, process optimization through statistical and genetic tools, downstream processing and some aspects of commercial products formulations are presented.

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“…The passage of fragmentation products through the fungal cell membrane may occur in a manner similar to that of the active transport mechanism which operates in the n-alkane assimilating Yarrowia lipolytica (Bassel and Mortimer, 1985). Additionally, the production of biosurfactants for the purpose of hydrocarbon emulsification and subsequent membrane sorption has been implicated in yeasts (Hisatsuka et al, 1977;Cirigliano and Carman, 1984), and in a number of filamentous species (Kirk and Gordon, 1988;Al-Hawash et al, 2018). Based on the model of n-alkane metabolism, once across the cellular membrane breakdown…”

Section: Assimilation and Mineralisationmentioning

confidence: 99%

Fungal bioremediation of polyethylene: Challenges and perspectives

Cowan

Costanzo

Benham

et al. 2021

J of Applied Microbiology

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Plastics have become ubiquitous in both their adoption as materials and as environmental contaminants.Widespread pollution of these versatile, man-made, and largely petroleum-derived polymers has resulted from their long-term mass production, inappropriate disposal, and inadequate end of life management. Polyethylene (PE) is at the forefront of this problem, accounting for one third of plastic demand in Europe in part due to its extensive use in packaging (European Parliament, 2020). Current recycling and incineration processes do not represent sustainable solutions to tackle plastic waste, especially once it becomes littered, and the development of new waste-management and remediation technologies are needed. Mycoremediation (fungal-based biodegradation) of PE has been the topic of several studies over the last two decades. The utility of these studies is limited by an inconclusive definition of biodegradation and a lack of knowledge regarding the biological systems responsible. This review highlights relevant features of fungi as potential bioremediation agents, before discussing the evidence for fungal biodegradation of both high-and low-density PE. An up-to-date perspective on mycoremediation as a future solution to PE waste is provided.

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Biodegradation of n-hexadecane by Aspergillus sp. RFC-1 and its mechanism

Cited by 36 publications

References 58 publications

Evaluation of crude oil biodegradation using mixed fungal cultures

Evaluation of crude oil biodegradation using mixed fungal cultures

Fungal biosurfactants, from nature to biotechnological product: bioprospection, production and potential applications

Fungal bioremediation of polyethylene: Challenges and perspectives

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