Liang Wenjun, Zhang Zhixue, Chi Hao, Ren Sida
Key Laboratory of Beijing on Regional Air Pollution Control, Beijing University of Technology, Beijing, 100124, China.
Environ Sci Pollut Res Int. 2022 Feb;29(7):10198-10209. doi: 10.1007/s11356-021-15546-2. Epub 2021 Sep 13.
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.
为了减少煤炭开采过程中产生的粉尘污染，以玉米秸秆、羧甲基纤维素钠（CMC）和添加剂合成了一种新型复合抑尘剂用于煤尘治理。本研究聚焦于抑尘剂的制备条件，并对其性能进行了系统研究。采用响应面法（RSM）优化原料配方和制备参数。抑尘剂中秸秆、CMC和碱的最佳质量比为65:20:15（m/m），在反应时间为1.5 h、转速为300 r/min的条件下制备而成。抑尘剂的pH值为8.0，呈悬浮状态。添加剂有利于提高抑尘性能，其表面张力和接触角可分别降至32.4 mN/m和32.0°。该抑尘剂的最大粘度为363.6 mPa·s，抗压强度可达200 kPa。吸湿率可达4%以上。在风速为14 m/s时，抗风蚀率可达99%。喷洒抑尘剂后，颗粒间的空隙被抑尘剂填充，相邻颗粒通过强大的机械作用结合在一起。
