Study on improving the hydrophilicity of coal by a biosurfactant-producing strain screened from coal

Liu, Jin-Di; Hu, Xiangming; Feng, Yue; Zhao, Yanyun; Wu, Mingyue; Wang, Xuwei; Yu, Xiaoxiao; Song, Chunyu; Wang, Qingshan; Geng, Zhi; Shen, Ding-Chen; Wang, Haoyu

doi:10.1016/j.jece.2022.107764

Cited by 5 publications

(2 citation statements)

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“…Didyk-Mucha et al studied the adsorption of biosurfactant compounds produced by Streptomyces into minerals, changing hydrophobic and ionizing properties . In addition, studies of biosurfactants had converted from production and adjuvant formulations to a resultant of diversified surfactants. ,– Zhang et al used crude guar as the major ingredient, adding surfactant and water retention agent for modification, and compound organic dust suppressant for spraying viscous dust …”

Section: Introductionmentioning

confidence: 99%

Effect of Sophorolipid Adsorption on the Coal Microstructure: Experimental and Wettability Mathematical Model Discussion

Wang,

Zheng,

Jiang

et al. 2023

Langmuir

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Green biosurfactants are emerging as a promising area of research. However, there is a limited focus on the adsorption and wetting characteristics of biosurfactants on coal dust. This study explores the effects of sophorolipid (SL) biosurfactants on the microstructure and wettability of different coalification degree coal. The microstructure parameters of SL adsorbed on coal dust were measured using a surface tensiometer, contact angle analyzer, and particle size analyzer. The results indicate that SL has the lowest critical surface tension, leading to a 9.25°decrease in the contact angle for low-rank bituminous coal (YZ-LRBC). Furthermore, SL significantly altered the particle size distribution of lignite (NM-LC) and YZ-LRBC. The pore size structure of SL-infiltrated coal dust was quantified using a specific surface area analyzer, revealing a decrease in the specific surface area and an increase in the average pore size. The infrared analysis demonstrated that SL permeation significantly increased the percentage of hydrophilic functional groups (hydroxyl structures) while reducing the hydrophobic functional groups (aliphatic hydrocarbon and aromatic structure). Based on the measured microstructure parameters, a regression equation for contact angle was established: [contact angle (°)] = 73.800 − 0.860 × [D10 (nm)] + 4.280 × [specific surface area (m 2 /g)]. Notably, the characteristic particle size D10 had a significant negative effect on the contact angle, while the specific surface area had a significant positive effect. These findings provide a theoretical foundation for the application of biosurfactants in water injection to reduce dust and improve the wetting efficiency.

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Section: Introductionmentioning

confidence: 99%

Effect of Sophorolipid Adsorption on the Coal Microstructure: Experimental and Wettability Mathematical Model Discussion

Wang,

Zheng,

Jiang

et al. 2023

Langmuir

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“…The study of political culture should include the investigation of the setting and operation of public power in a specific period and a specific social community from the four dimensions of political spirit, political value, political thought, and political ecology [ 1 ]. Before the Ming and Qing dynasties, the main political structure of the central government is shown in Figure 1 .…”

Section: Introductionmentioning

confidence: 99%

[Retracted] A Study of the Political Culture of the Ming and Qing Agribusiness Societies under the Imperial Environment

Yuan

2022

Journal of Environmental and Public Health

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In the Ming and Qing dynasties, while the social life, economic structure, and even cultural atmosphere underwent profound changes, the dominant aspect of political culture was still deduced along the traditional track of the imperial system. The prominent characteristics of China's social form in the Ming and Qing dynasties are the development of the commercial economy and the enhancement of social freedom; the developed trend of common people’s culture; and the sustainable development of the centralized monarch-bureaucratic-aristocratic system, which constitute a self-consistent pattern. This paper on the political culture of political spirit, political value, political thought, the four dimensions, the specific period, specific social community, public power setting and operation, and the perspective of the Ming and Qing social form of political culture, this study helps people to the imperial environment of Ming and Qing rural political culture and understanding and exploration.

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Biotechnological potentials of surfactants in coal utilization: a review

Akimbekov,

Digel,

Zhubanova

et al. 2024

Environ Sci Pollut Res

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The quest for scientifically advanced and sustainable solutions is driven by growing environmental and economic issues associated with coal mining, processing, and utilization. Consequently, within the coal industry, there is a growing recognition of the potential of microbial applications in fostering innovative technologies. Microbial-based coal solubilization, coal beneficiation, and coal dust suppression are green alternatives to traditional thermochemical and leaching technologies and better meet the need for ecologically sound and economically viable choices. Surfactant-mediated approaches have emerged as powerful tools for modeling, simulation, and optimization of coal-microbial systems and continue to gain prominence in clean coal fuel production, particularly in microbiological co-processing, conversion, and beneficiation. Surfactants (surface-active agents) are amphiphilic compounds that can reduce surface tension and enhance the solubility of hydrophobic molecules. A wide range of surfactant properties can be achieved by either directly influencing microbial growth factors, stimulants, and substrates or indirectly serving as frothers, collectors, and modifiers in the processing and utilization of coal. This review highlights the significant biotechnological potential of surfactants by providing a thorough overview of their involvement in coal biodegradation, bioprocessing, and biobeneficiation, acknowledging their importance as crucial steps in coal consumption.

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Study on improving the hydrophilicity of coal by a biosurfactant-producing strain screened from coal

Cited by 5 publications

References 50 publications

Effect of Sophorolipid Adsorption on the Coal Microstructure: Experimental and Wettability Mathematical Model Discussion

Effect of Sophorolipid Adsorption on the Coal Microstructure: Experimental and Wettability Mathematical Model Discussion

[Retracted] A Study of the Political Culture of the Ming and Qing Agribusiness Societies under the Imperial Environment

Biotechnological potentials of surfactants in coal utilization: a review

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