Structural degradation of Thar lignite using MW1 fungal isolate: Optimization studies

Haider, Rizwan; Ghauri, Muhammad Afzal; Jones, E. G.; Orem, William H.; SanFilipo, John R.

doi:10.1016/j.ibiod.2015.02.029

Cited by 19 publications

(10 citation statements)

References 24 publications

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“…This phenomenon demonstrates that the CFF can promote the release of HAs more quickly. Other studies indicate that the optimal fungal incubation time to obtain the maximum release of organics from coal oen exceeds 7 days, 17,38 which is consistent with the results seen for coal dissolution by solution A in this study. Efficient solubilization occurs in medium containing rich secondary metabolites, which largely accumulate when fungi grow to a certain extent.…”

Section: Optimization Of Ha Extraction Conditionssupporting

confidence: 91%

Extraction optimization and quality evaluation of humic acids from lignite using the cell-free filtrate of Penicillium ortum MJ51

Tan

Wang

et al. 2022

RSC Adv.

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Section: Optimization Of Ha Extraction Conditionssupporting

confidence: 91%

Extraction optimization and quality evaluation of humic acids from lignite using the cell-free filtrate of Penicillium ortum MJ51

Tan

Wang

et al. 2022

RSC Adv.

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“…It was previously postulated that fungal interaction with coal particles results in bioconversion of this substrate into a mixture of heterogeneous macromolecules that are mainly humic acids (Cohen and Gabriele 1982;Henning et al 1997;Catcheside and Ralph 1999;Dong et al 2006). Indeed, microorganisms isolated from coalmines have excellent potential for coal solubilization (Malik et al 2017) and have been shown to catalyze release of complex organic moieties including polyaromatic hydrocarbons (Haider et al 2015).…”

Section: Discussionmentioning

confidence: 99%

Biological conversion of low-grade coal discard to a humic substance-enriched soil-like material

Sekhohola-Dlamini

Cowan

2017

Int J Coal Sci Technol

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A mutualistic relationship between grasses, coal-degrading fungi, and arbuscular mycorrhizal fungi was proposed to account for the phyto-biodegradation of coal discard. In this study pot trial experiments were carried out to confirm transformation of the carbonaceous substrate, in the presence of a suite of coal degrading fungi and arbuscular mycorrhizal fungi, into a humic-enriched soil-like material in the Cynodon dactylon/coal rhizosphere. The results show that after 47 weeks of C. dactylon growth on coal discard the concentration of humics increased from (62.9 ± 1.5) to (112.1 ± 5.4) mg/kg. Substrate humic acid-like substance concentration positively correlated (r 2 = 0.95) with accumulation of above ground C. dactylon biomass. FTIR spectroscopy of the extracted humic-like substances confirmed both product identity and increased oxidation of the coal discard substrate. Substrate ash content and electrical conductivity declined coincident with an increase in humic acid-like substance concentration, which together reduced the intensity of acidity in the C. dactylon/coal discard rhizosphere. These observations support the proposal that biological oxidative degradation of coal discard leads to increased humic-like substance concentration and formation of a soil-like material. Results have profound implications for use of coal discard as an organic substrate to replace topsoil in phyto-bioremediation strategies for sustainable large-scale rehabilitation of coal discard dumps.

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“…Coal use for electricity production brings about substantial emissions of harmful gases such as sulfur and nitrogen oxides [ 234 ]. Biosolubilization of lignite might yield liquid products, which can be processed into utilizable energy [ 22 , 253 ]. A variety of aromatic and aliphatic compounds, which can be found in biosolubilized lignite, could serve as chemical feedstock for subsequent processes such as methanogenesis [ 22 , 236 ].…”

Section: Nature-like Bioremediation Technologies Based On Hs–microorganism Interactionsmentioning

confidence: 99%

“…Biosolubilization of lignite might yield liquid products, which can be processed into utilizable energy [ 22 , 253 ]. A variety of aromatic and aliphatic compounds, which can be found in biosolubilized lignite, could serve as chemical feedstock for subsequent processes such as methanogenesis [ 22 , 236 ]. They can be also used as raw material for the production of valuable chemicals [ 163 ].…”

Section: Nature-like Bioremediation Technologies Based On Hs–microorganism Interactionsmentioning

confidence: 99%

“…They also play the role of extracellular electron shuttles (EESs), which enables the availability of spatially remote substrates [ 15 , 16 , 17 , 18 ]. In addition, HSs increase the solubility of poorly soluble substrates [ 19 , 20 , 21 , 22 ]. HSs enhance the survival and growth of microorganisms under unfavorable and adverse conditions due to antioxidant activity [ 23 , 24 , 25 ].…”

Section: Introductionmentioning

confidence: 99%

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Interactions between Humic Substances and Microorganisms and Their Implications for Nature-like Bioremediation Technologies

Куликова

Perminova

2021

Molecules

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The state of the art of the reported data on interactions between microorganisms and HSs is presented herein. The properties of HSs are discussed in terms of microbial utilization, degradation, and transformation. The data on biologically active individual compounds found in HSs are summarized. Bacteria of the phylum Proteobacteria and fungi of the phyla Basidiomycota and Ascomycota were found to be the main HS degraders, while Proteobacteria, Actinobacteria, Bacteroidetes, and Firmicutes were found to be the predominant phyla in humic-reducing microorganisms (HRMs). Some promising aspects of interactions between microorganisms and HSs are discussed as a feasible basis for nature-like biotechnologies, including the production of enzymes capable of catalyzing the oxidative binding of organic pollutants to HSs, while electron shuttling through the utilization of HSs by HRMs as electron shuttles may be used for the enhancement of organic pollutant biodegradation or lowering bioavailability of some metals. Utilization of HSs by HRMs as terminal electron acceptors may suppress electron transfer to CO2, reducing the formation of CH4 in temporarily anoxic systems. The data reported so far are mostly related to the use of HSs as redox compounds. HSs are capable of altering the composition of the microbial community, and there are environmental conditions that determine the efficiency of HSs. To facilitate the development of HS-based technologies, complex studies addressing these factors are in demand.

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Structural degradation of Thar lignite using MW1 fungal isolate: Optimization studies

Cited by 19 publications

References 24 publications

Extraction optimization and quality evaluation of humic acids from lignite using the cell-free filtrate of Penicillium ortum MJ51

Extraction optimization and quality evaluation of humic acids from lignite using the cell-free filtrate of Penicillium ortum MJ51

Biological conversion of low-grade coal discard to a humic substance-enriched soil-like material

Interactions between Humic Substances and Microorganisms and Their Implications for Nature-like Bioremediation Technologies

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