College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China; State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, China.
College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China; State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, China.
J Hazard Mater. 2023 Jun 15;452:131238. doi: 10.1016/j.jhazmat.2023.131238. Epub 2023 Mar 20.
Aiming at the high-concentration dust pollution in open-pit coal mines, a foam dust suppressant with low viscosity and consolidated coal dust is developed. In order to reduce the limited effect of binder viscosity on the foaming ability and wettability of foam, tapioca starch is oxidized with Cu/HO System in this study to reduce the molecular weight of the polymer and prepare materials with high consolidation and low viscosity. The dust suppression performance of the sample is measured, and the microscopic adsorption mechanism of the dust suppressant is investigated by molecular dynamics simulation. The results show that the oxidized starch adhesive solution consists of 20 g tapioca starch, 0.88 ml hydrogen peroxide, 2.4 g sodium hydroxide, and 0.48 g copper sulfate, which need to be diluted to 10 times the original volume, and 1 g of surfactant (sodium fatty alcohol polyoxyethylene ether sulfate/alkyl Glycoside=1:4) is added to prepare a new foam dust suppressant. The viscosity is 2.6 mPa·s, the foaming multiple is 6.25, the contact angle is 13.73° at the first second, the hardness reaches 70.75 HA, and a dust suppression rate of 98.17% for PM10. The dust suppressant can effectively suppress coal dust.
针对露天煤矿高浓度粉尘污染问题，研制出了一种低粘度、固结性强的泡沫抑尘剂。为了降低胶黏剂的粘度对泡沫的发泡能力和润湿性的限制作用，本研究采用 Cu/HO 体系对木薯淀粉进行氧化，以降低聚合物的分子量，制备出固结性强、粘度低的材料。测量了样品的抑尘性能，并通过分子动力学模拟研究了抑尘剂的微观吸附机理。结果表明，氧化淀粉胶黏剂溶液由 20 g 木薯淀粉、0.88 ml 双氧水、2.4 g 氢氧化钠和 0.48 g 硫酸铜组成，需要稀释至原始体积的 10 倍，并添加 1 g 表面活性剂（脂肪酸醇聚氧乙烯醚硫酸盐/烷基糖苷=1:4），以制备一种新型泡沫抑尘剂。该抑尘剂的粘度为 2.6 mPa·s，发泡倍数为 6.25，在第一秒的接触角为 13.73°，硬度达到 70.75 HA，对 PM10 的抑尘率为 98.17%。该抑尘剂能够有效地抑制煤尘。
