Abstract
To solve issues of low consolidation strength, poor dust suppression effect, and secondary pollution of the current coal dust suppressors, a greener and higher-consolidation-strength composite dust suppressor was synthesized by the radical polymerization of xanthan gum (XG) as the graft substrate, methyl acrylate (MA), and vinyl acetate (VAc) as the graft monomers. Taking compressive strength as the main optimization index and viscosity and surface tension as the secondary indices, the optimum ratio of MA:VAc was 3:5 and the optimum solid content was 2%. Experiments reveal that the prepared dust suppressant can naturally infiltrate into coal to form a hard solidified layer. At a wind speed of 10 m/s, the solidified layer still maintained structural integrity, indicating that the dust suppressant exhibits a good dust fixation effect. The dust suppressant can not only maintain relatively stable performance for a period of time but also degrade naturally. Furthermore, molecular dynamics simulation reveals not only the interaction mechanism between coal molecules and the dust suppressor but also the wetting mechanism of the dust suppressor. Experimental and simulation results reveal that as a multifunctional dust suppressor with excellent performance, the as-prepared dust suppressor demonstrates the immense potential for the control of coal dust.
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Author gratitude is extended to the prospective editor(s) and reviewers that will/have spared time to guide toward a successful publication.
Funding
This work was supported by the National Key Technologies R&D Program of China (2018YFC0807900); the Taishan Scholars Project Special Funding in Shandong Province, China (TS20190935); the Key Program of the National Natural Science Foundation of China (42077444, 51674038, 51874193); the Shandong Province Natural Science Foundation (ZR2020ME101 and ZR2018JL019); the Shandong Province Science and Technology Development Plan (2017GSF220003); the Qingchuang Science and Technology Program of Shandong Province University (2019KJG008); the Shandong Province First Class Subject Funding Project (01AQ05202); and the Taishan Scholar Talent Team Support Plan for Advantaged & Unique Discipline Areas.
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Miao-Miao Li, Jian Qiao, and Yan-Yun Zhao conceived the work and designed the experiments and synthesized the novel dust suppressant; Su-Su Bian, Shi-Jian Yu, and Xiang-Ming Hu analyzed the microstructure, viscosity, and surface tension of the dust suppressant; Miao-Miao Li, Su-Su Bian, and Jian Qiao tested and analyzed the wind erosion resistance, biodegradability, water retention, and compressive strength of the dust suppressant; Miao-Miao Li and Su-Su Bian used molecular dynamics to simulate the mechanism of dust suppressant; Xiang-Ming Hu performed FTIR and NMR; Miao-Miao Li, Yan-Yun Zhao, and Shi-Jian Yu wrote the manuscript with contributions from all authors.
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Li, ., Zhao, Y., Bian, S. et al. A green, environment-friendly, high-consolidation-strength composite dust suppressant derived from xanthan gum. Environ Sci Pollut Res 29, 7489–7502 (2022). https://doi.org/10.1007/s11356-021-16258-3
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DOI: https://doi.org/10.1007/s11356-021-16258-3