Efficiency, mechanism, influencing factors, and integrated technology of biodegradation for aromatic compounds by microalgae: A review

Li, Haiping; Meng, Fanping

doi:10.1016/j.envpol.2023.122248

Cited by 20 publications

(2 citation statements)

References 107 publications

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“…The production of phenolic or aromatic compounds depends on the hydrolyzation parameters, such as temperature, acid concentration, process duration, and on the biomass chosen [ 32 ]. Chlorella vulgaris has been described to metabolize multiple different phenols and aromatics [ 33 ], but correlating interactions between furans and other compounds have to be assessed on a case-by-case basis.…”

Section: Resultsmentioning

confidence: 99%

Bioconversion of Furanic Compounds by Chlorella vulgaris—Unveiling Biotechnological Potentials

Kriechbaum,

Spadiut,

Kopp

2024

Microorganisms

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Lignocellulosic biomass is abundant on Earth, and there are multiple acidic pretreatment options to separate the cellulose, hemicellulose, and lignin fraction. By doing so, the fermentation inhibitors 5-Hydroxymethylfurfural (HMF) and furfural (FF) are produced in varying concentrations depending on the hydrolyzed substrate. In this study, the impact of these furanic compounds on Chlorella vulgaris growth and photosynthetic activity was analyzed. Both compounds led to a prolonged lag phase in Chlorella vulgaris growth. While the photosynthetic yield Y(II) was not significantly influenced in cultivations containing HMF, FF significantly reduced Y(II). The conversion of 5-Hydroxymethylfurfural and furfural to 5-Hydroxymethyl-2-Furoic Acid and 2-Furoic Acid was observed. In total, 100% of HMF and FF was converted in photoautotrophic and mixotrophic Chlorella vulgaris cultivations. The results demonstrate that Chlorella vulgaris is, as of now, the first known microalgal species converting furanic compounds.

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Section: Resultsmentioning

confidence: 99%

Bioconversion of Furanic Compounds by Chlorella vulgaris—Unveiling Biotechnological Potentials

Kriechbaum,

Spadiut,

Kopp

2024

Microorganisms

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“…Wang et al., 2011). Aromatic hydrocarbons, compared to alkanes, are more challenging to degrade (H. P. Li & Meng, 2023). Microorganisms utilize dioxygenase to introduce two oxygen atoms into aromatic compounds, forming the intermediate products trans or cis diol, which are then converted to catechol for further degradation.…”

Section: Introductionmentioning

confidence: 99%

Metabolic Characterization and Geochemical Drivers of Active Hydrocarbon‐Degrading Microorganisms

Li,

Huang,

Cai

et al. 2024

JGR Biogeosciences

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Understanding the metabolic characteristics and controlled geochemical factors of functional microorganisms in petroleum‐contaminated areas at different locations is pivotal for enhancing pollutant removal strategies. To address the existing research gap in this domain, we employed stable‐isotope‐probing (SIP) with multi‐isotope labeling substrates, combined with 16S amplicon sequencing, metagenomic sequencing, and geochemical factor analysis. Utilizing n‐hexadecane and phenanthrene as model compounds, our study revealed location‐specific differences in the composition of functional microorganisms. Despite these variances, key players such as Pseudomonas, Marinobacter, Alcanivorax, Ochrobactrum, and Sphingomonas consistently emerged as active degraders of n‐hexadecane and/or phenanthrene. Several genera, including Pseudomonas, Ochrobactrum, Alcanivorax, Nitriliruptoraceae, and Sphingobacterium, demonstrated versatility by effectively degrading both contaminants. SIP‐metagenomic binning facilitated the acquisition of genomes from key active degraders, such as Pseudomonas sp., Ochrobactrum sp., Sphingomonas sp., and Shinella sp. This enabled a comprehensive analysis of petroleum hydrocarbon degradation pathways and genes, encompassing PAH dioxygenase genes, alkB genes, phthalate, and salicylate‐related pathways. Environmental factor and variation partitioning analysis revealed that oil pollution significantly influences the functional microbial community (12%), followed by available potassium and available nitrogen. Geochemical parameters and geographic location independently explained 14% and 21% of total variations, respectively. Intriguingly, more than half (51%) of the variation in functional microbial community structure remains unexplained, possibly due to unmeasured environmental variables. Our study contributes valuable insights into the in situ bioremediation mechanism for petroleum‐contaminated soil, elucidating factors influencing functional microbial structures across locations. These findings provide a vital theoretical reference for in situ regulation and bioremediation of petroleum hydrocarbon pollution in diverse environmental contexts.

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Systematic Assessment of Mechanisms, Developments, Innovative Solutions, and Future Perspectives of Microplastics and Ecotoxicity – A Review

Manikandan,

Preethi,

Deena

et al. 2024

Advanced Sustainable Systems

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As plastics become more ubiquitous, their impact on the environment and on human health cannot be overlooked. Once generated, micro‐ and nano‐plastics end‐up in the environment, causing widespread health and environmental risks. This is a significant environmental problem given the minuscule sizes of microplastics, and therefore warrants further investigation. This study presents a comprehensive review of the ecotoxicology of microplastics and methods for their degradation and decomposition besides discussing the fate and transport processes, recent progress, emerging strategies, challenges and potential future directions. The authors carefully evaluate the processes through which microplastics cause harm, from molecular interactions in species, to ecological impacts, and end with advances in microplastic biodegradation. Different kinds of microplastics found in the environment include polyethylene, polystyrene, polypropylene, polyvinyl chloride, polycarbonate, polyurethane, polypropylene, and polyethylene terephthalate. Analysis of microbial and enzymatic decomposition provides several swelling mitigation strategies designed to reduce environmental threats. In‐depth investigations of microplastic ecotoxicity and biodegradation are being facilitated by interdisciplinary proposals in the areas of nanotechnology, new analytical methods, and synthetic biology. The extensive study helps understand microplastics comprehensively which in‐turn ensures informed actions to mitigate the challenge of the environmental impact of microplastics for sustainable future.

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Efficiency, mechanism, influencing factors, and integrated technology of biodegradation for aromatic compounds by microalgae: A review

Cited by 20 publications

References 107 publications

Bioconversion of Furanic Compounds by Chlorella vulgaris—Unveiling Biotechnological Potentials

Bioconversion of Furanic Compounds by Chlorella vulgaris—Unveiling Biotechnological Potentials

Metabolic Characterization and Geochemical Drivers of Active Hydrocarbon‐Degrading Microorganisms

Systematic Assessment of Mechanisms, Developments, Innovative Solutions, and Future Perspectives of Microplastics and Ecotoxicity – A Review

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