Preparation and dust suppression effect of wind erosion dust suppressant
WANG Linkai1,, GUO Hongxia1,,, QIN Jianping2, HUANG Yuhu2, LI Beibei2 1.College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China 2.National Engineering Research Center of Urban Environmental Pollution Control, Beijing Municipal Research Institute of Environmental Protection, Beijing 100037, China
Abstract:The performance indices to characterize the dust suppression effect of wind erosion dust suppressant in China are not systematic, and the preparation materials and processes of most dust suppressants are relatively complicated. On the basis of the study on the performance indices of dust suppressant, the validity period evaluation index of dust suppressant was added. Type A dust suppressant was prepared by the compounding process with the the raw materials of film-forming agent and penetrant, and its dust suppression effect was compared with water and type B dust suppressant which was prepared by complex polymerization reaction. The results showed that the indices of viscosity, compressive strength, surface tension, permeability, dust suppression efficiency and validity period of dust suppression could well characterize the dust suppression effect of wind erosion dust suppressant. The performance of type A and B dust suppressants was basically the same and significantly better than that of water, while the simple compounding process had some advantages over the complex polymerization reaction. The initial dust suppression efficiencies of type A and B were 99.6% and 99.8%, respectively, which were much higher than that of water (84.1%). After spraying for 75 d, type B still had a high dust suppression efficiency (97.3%), and the validity period of dust suppression was up to 2 months, while the dust suppression efficiency of water decreased to about 40%. On the basis of the above researchs, it is suggested to carry out the study on the friendliness indices of dust suppressant in different environmental factors in the future, such as biodegradability test and acute toxicity test on earthworm and freshwater fish. Key words:wind erosion/ dust suppressant/ performance indices/ validity period of dust suppression.
图1抑尘剂黏度随纤维素衍生物质量分数的变化 Figure1.Change of viscosity of dust suppressant with cellulose derivative mass fraction
ZHAO P S, DONG F, HE D, et al. Characteristics of concentrations and chemical compositions for PM2.5 in the region of Beijing, Tianjin, and Hebei, China[J]. Atmospheric Chemistry and Physics, 2013, 13(9): 4631-4644. doi: 10.5194/acp-13-4631-2013
KAVOURAS I G, ETYEMEZIAN V, NIKOLICH G, et al. A new technique for characterizing the efficacy of fugitive dust suppressants[J]. Journal of the Air and Waste Management Association, 2009, 59(5): 603-612. doi: 10.3155/1047-3289.59.5.603
1.College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China 2.National Engineering Research Center of Urban Environmental Pollution Control, Beijing Municipal Research Institute of Environmental Protection, Beijing 100037, China Received Date: 2020-03-02 Accepted Date: 2020-05-14 Available Online: 2020-12-08 Keywords:wind erosion/ dust suppressant/ performance indices/ validity period of dust suppression Abstract:The performance indices to characterize the dust suppression effect of wind erosion dust suppressant in China are not systematic, and the preparation materials and processes of most dust suppressants are relatively complicated. On the basis of the study on the performance indices of dust suppressant, the validity period evaluation index of dust suppressant was added. Type A dust suppressant was prepared by the compounding process with the the raw materials of film-forming agent and penetrant, and its dust suppression effect was compared with water and type B dust suppressant which was prepared by complex polymerization reaction. The results showed that the indices of viscosity, compressive strength, surface tension, permeability, dust suppression efficiency and validity period of dust suppression could well characterize the dust suppression effect of wind erosion dust suppressant. The performance of type A and B dust suppressants was basically the same and significantly better than that of water, while the simple compounding process had some advantages over the complex polymerization reaction. The initial dust suppression efficiencies of type A and B were 99.6% and 99.8%, respectively, which were much higher than that of water (84.1%). After spraying for 75 d, type B still had a high dust suppression efficiency (97.3%), and the validity period of dust suppression was up to 2 months, while the dust suppression efficiency of water decreased to about 40%. On the basis of the above researchs, it is suggested to carry out the study on the friendliness indices of dust suppressant in different environmental factors in the future, such as biodegradability test and acute toxicity test on earthworm and freshwater fish.