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Preparation and optimization of the environmental dust suppressant with agricultural waste straw

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Abstract

In order to reduce the dust pollution caused by the coal mining process, a novel composite environmental dust suppressant for coal dust control was synthesized by corn straw, sodium carboxymethyl cellulose (CMC), and additives. This study focused on the preparation conditions of the dust suppressant, and the performances of which were investigated systematically. Response surface method (RSM) was used to optimize the raw material formulation and preparation parameters. The optimum mass ratio of straw, CMC, and alkali of the dust suppression was 65:20:15 (m/m), which was prepared under the conditions of the reaction time being 1.5 h and the rotation speed being 300 r/min. The pH of the dust suppressant was 8.0, and the state of which was suspension. Additives were benefited to enhance the suppressant performance, and the surface tension and the contact angle could decrease to 32.4 mN/m and 32.0°. The suppressant has a maximum viscosity of 363.6 mPa·s, and the compressive strength could be up to 200 kPa. The hygroscopic rate could reach more than 4%. The wind erosion resistance could be up to 99 % at the wind speed of 14 m/s. After spraying the dust suppressant, the gap between particles was filled with dust suppressant, and the adjacent particles were bound by strong mechanical action.

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Funding

This research was financially supported by the Beijing Municipal Science and Technology Project Program (Z191100009119002).

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Authors and Affiliations

  1. Key Laboratory of Beijing on Regional Air Pollution Control, Beijing University of Technology, Beijing, 100124, China

    Wenjun Liang, Zhixue Zhang, Hao Chi & Sida Ren

Authors
  1. Wenjun Liang
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  2. Zhixue Zhang
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  3. Hao Chi
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  4. Sida Ren
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Contributions

All authors contributed to the study conception and design. Material preparation, data collection, and analysis were performed by Wenjun Liang, Zhixue Zhang, Hao Chi, and Sida Ren. The first draft of the manuscript was written by Hao Chi, and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Wenjun Liang.

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Liang, W., Zhang, Z., Chi, H. et al. Preparation and optimization of the environmental dust suppressant with agricultural waste straw. Environ Sci Pollut Res 29, 10198–10209 (2022). https://doi.org/10.1007/s11356-021-15546-2

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