## 1 Introduction  
Climate change has been exacerbated during recent years. With the constant enhancement of the awareness of ecological and environmental protection, people and the government in China have been increasingly focused on urban environmental problems. Urban roads are key channels for transportation inside a city, the dust atmosphere of which has a significant impact on the urban environment [1; 2; 3]. Therefore, the elimination of fugitive road dust is extremely urgent. Fugitive road dust refers to the dust in the atmosphere that comes from road surfaces under certain dynamic conditions (such as wind, vehicle wheel rolling, and crowd activity) [4; 5; 6]. [PERSON] [7] and [PERSON] [8] show that fugitive road dust accounts for 14.3% of emission sources for PM\({}_{2.5}\) (pollutants such as elemental carbon, sodium, magnesium, calcium, aluminum, and iron in dust emissions, the particle size of which is 2.5). [PERSON] [9] and [PERSON] [10] found that the annual emissions and the emission factors of fugitive dust PM\({}_{2.5}\) on suburban roads are higher than on downtown roads after researching the spatial distribution characteristics of PM\({}_{2.5}\). Through the APRS-CMAQ model, [PERSON], [PERSON], and [PERSON] [11] estimated that the contribution rate of fugitive road dust to PM\({}_{10}\) was 36% in Beijing in 2010. Therefore, fugitive road dust is the key source of PM\({}_{2.5}\) and PM\({}_{10}\) in the atmosphere [12; 13]. The control of fugitive road dust pollution is of great significance for improving the air quality in urban environments. Under the dust control policy of \"prevention-based control\", present measures are mainly designed to control fugitive road dust and reduce atmospheric pollution [14; 15] through water sprinkling, windscreens [16; 17], and chemical dust suppressants [18], in combination with mechanical, electrostatic, and bag-filter techniques and wet dust removal. At present, researchers are mainly committed to the research and development of chemical dust suppressants regarding fugitive road dust control. After comparing the effects of road surface cleaning, water flushing, and chemical dust suppressants upon reducing the dust in the surrounding environment, [PERSON] [19] found that chemical dust suppressants demonstrate the most obvious effect on fugitive road dust suppression. [PERSON] [20; 21; 22] developed a new type of biodegradable environmentally friendly dust suppressant and a highly efficient composite dust suppressant which can effectively inhibit the re-entrainment of coal dust and reduce environmental pollution. [PERSON] [23] developed a chemical dust suppressant for tarmac roads. [PERSON] [24] used hydroxyethyl cellulose, acrylamide, and stearyl methyl acrylate to prepare an environmental protection dust suppressant for preventing dust during coal storage and transportation. [PERSON] [25] magnetized the surfactants in moist dust suppressants, thus enhancing the moisturizing capacity toward coal dust and improving the dust suppression performance. [PERSON] [26] prepared a dust suppressant by using sodium polyacrylate as a binder, sodium carbonate as a moisture absorbent, polyethylene glycol as a water-retaining agent, and alkyl glycoside as a surfactant. [PERSON] [27] synthesized a polymer dust suppressant with raw materials of polyvinyl alcohol, carboxymethyl cellulose, and acrylamide. With the enhancement of environmental protection awareness among people, topics of environmental protection have become increasingly key social issues. Road dust suppressant formulas proposed by many scholars have begun to shift into the ecological and environmental protection direction. Taking the fugitive dust on some urban roads in Beijing as a research object, [PERSON] [28] researched the change of PM\({}_{10}\) and PM\({}_{2.5}\) concentrations in fugitive road dust before and after the spraying of a new environmentally friendly road dust suppressant. [PERSON] [29] developed a biodegradable starch-based dust suppressant through microwave synthesis.