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

Li, Shiying; Tan, Jian; Wang, Yi; Li, Peipei; Hu, Desheng; Shi, Qiuzhe; Yan-jun, Yue; Li, Fang; Han, Yanlai

doi:10.1039/d1ra08019a

Cited by 4 publications

(4 citation statements)

References 58 publications

(96 reference statements)

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“…All the corresponding data are reported in Table 4 . The F-value of 80.22 was much higher than the standard F-value (F 0.05 = 4.25) [ 18 ], implying a significant level of models and a small chance of noise impacts on their accuracy. P -value below 0.05 indicates that the factor had a significant effect on the response values [ 21 ], and the P -value decreased as the variable’s importance increases.…”

Section: Resultsmentioning

confidence: 99%

“…HS concentration is shown as a color gradient from red to blue and from high to low. The shape of the contour plot of the response surface can directly reflect the influence of multiple factors on the response value, where the ellipse indicates strong interaction, and the circle is opposite [ 18 ]. The response surface function’s shape was expressed by a 3D surface plot.…”

Section: Resultsmentioning

confidence: 99%

“…In addition, the function variance and residual and response surface can be calculated directly through software analysis, which has the advantages of cost saving and high credibility. For example, Li [ 18 ] used the RSM to optimize the extraction conditions of HA from lignite using Penicillium Ortum MJ51 cell-free filtrate. According to the research [ 19 ], RSM was used to determine the optimal conditions, and a mathematical model was established to accurately predict the changes in sludge water content and the extraction rate of HA.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Co-Thermal Oxidation of Lignite and Rice Straw for Synthetization of Composite Humic Substances: Parametric Optimization via Response Surface Methodology

Chen

Zhuang

et al. 2022

IJERPH

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In this study, Baoqing lignite (BL) and rice straw (RS), which were the representatives of low-rank coal and biomass, were co-thermally oxidized to produce composite humic substances (HS), including humic acid (HA) and fulvic acid (FA). Taking HS content as the output response, the co-thermally oxidizing conditions were optimized through single factor experiment and response surface methodology (RSM). The structures of HA and FA prepared under optimized conditions were analyzed by SEM, UV, and FTIR. Results showed that HS content was clearly influenced by the material ratio, oxidation time, and oxidation temperature, as well as their interactions. The optimized co-thermal oxidization condition was as follows: BL and RS pretreated with a material ratio of 0.53, oxidation time of 59.50 min, and oxidation temperature of 75.63 °C. Through verification, the experimental value (62.37%) had a small relative error compared to the predicted value (62.27%), which indicated that the developed models were fit and accurate. The obtained HA had a tightly packed block structure; FA had a loosely spherical shape. The molecular weight of FA was 2487 Da and HA was 20904 Da; both had a smaller molecular weight than that reported in other literature. FA showed strong bands at 1720 cm−1, thus confirming the presence of more oxygen-containing functional groups. The appearance of double peaks at 2900~2980 cm−1 indicated that HA contains more aliphatic chains. The co-thermal oxidation of BL and RS gives a new method for the synthesis of HS, and the optimization of co-thermal oxidation conditions will provide fundamental information for the industrialization of composite HS.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Co-Thermal Oxidation of Lignite and Rice Straw for Synthetization of Composite Humic Substances: Parametric Optimization via Response Surface Methodology

Chen

Zhuang

et al. 2022

IJERPH

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“…On the other hand, Cunninghamella bertholletiae (67.03 mg/L), Simplicillium subtropicum (45.95 mg/L), Penicillium daleae (42.70 mg/L), and Trichoderma koningiopsis (42.43 mg/L) produced high amounts of fulvic acid, indicating the occurrence of depolymerization. Penicillium ortum MJ51 was isolated by Li et al from lignite, and they used its cell-free filtrates to extract HA from lignite [ 186 ].…”

Section: Agricultural Applications Of Microorganisms Native To Coal E...mentioning

confidence: 99%

Biotechnology of Microorganisms from Coal Environments: From Environmental Remediation to Energy Production

Akimbekov

Digel

Tastambek

et al. 2022

Biology

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It was generally believed that coal sources are not favorable as live-in habitats for microorganisms due to their recalcitrant chemical nature and negligible decomposition. However, accumulating evidence has revealed the presence of diverse microbial groups in coal environments and their significant metabolic role in coal biogeochemical dynamics and ecosystem functioning. The high oxygen content, organic fractions, and lignin-like structures of lower-rank coals may provide effective means for microbial attack, still representing a greatly unexplored frontier in microbiology. Coal degradation/conversion technology by native bacterial and fungal species has great potential in agricultural development, chemical industry production, and environmental rehabilitation. Furthermore, native microalgal species can offer a sustainable energy source and an excellent bioremediation strategy applicable to coal spill/seam waters. Additionally, the measures of the fate of the microbial community would serve as an indicator of restoration progress on post-coal-mining sites. This review puts forward a comprehensive vision of coal biodegradation and bioprocessing by microorganisms native to coal environments for determining their biotechnological potential and possible applications.

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Highly humified nitrogen-functionalized lignite activated by urea pretreatment and ozone plasma oxidation

Sarlaki

Kianmehr

Ghorbani

et al. 2023

Chemical Engineering Journal

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

Abstract: Bio-solubilization of lignite is a promising technology to transform coal into humic acids (HAs) which are broadly used in agriculture.

Cited by 4 publications

References 58 publications

Co-Thermal Oxidation of Lignite and Rice Straw for Synthetization of Composite Humic Substances: Parametric Optimization via Response Surface Methodology

Co-Thermal Oxidation of Lignite and Rice Straw for Synthetization of Composite Humic Substances: Parametric Optimization via Response Surface Methodology

Biotechnology of Microorganisms from Coal Environments: From Environmental Remediation to Energy Production

Highly humified nitrogen-functionalized lignite activated by urea pretreatment and ozone plasma oxidation

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