Efficient removal of atmospheric dust by a suppressant made of potato starch, polyacrylic acid and gelatin
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ORIGINAL PAPER
Efficient removal of atmospheric dust by a suppressant made of potato starch, polyacrylic acid and gelatin Yao Hu1,2 · Lei Shi3 · Zhihua Shan1,2 · Rui Dai1,2 · Hui Chen1,2 Received: 12 January 2020 / Accepted: 1 June 2020 © Springer Nature Switzerland AG 2020
Abstract Air pollution by dust particles is a major health concern in urban and industrialized areas. Actual methods to reduce dust contamination, such as water spraying, are limited, calling for new dust suppressants. Here, we synthesized a liquid starchbased dust suppressant by grafting polyacrylic acid onto NaOH-pretreated potato starch and then crosslinking the grafted copolymer with gelatine. This dust suppressant was characterized by Fourier-transform infrared spectrometry, thermogravimetry, viscosity and contact angle measurements. We also measured permeability, water retention, anti-wind erosion and degradability of the dust suppressant. Field experiments tested the dust suppressing effect on particle matter 2.5 ( PM2.5) and particulate particle matter 10.0 (PM10). We found that the addition of NaOH to potato starch improved the reaction efficiency and simplified the preparation process. The dust suppressant demonstrated excellent degradability, as shown by weight loss of 82 wt % after 60 days of soil burial, and the total dust suppression rates reached 57% for PM2.5 and 56% for PM10 in the field. Compared with spraying water, total dust suppression was higher by 25% and 33%, respectively. Keywords Potato starch · Gelatine · Degradation · Field applications · Dust suppression rates
Introduction Dust particle dispersions that are caused by the outdoor excavation of coal, transportation of sand, stone and coal and exposed ground in urban areas are a major source of pollution in the world (Rodriguez et al. 2007; Zhang et al. 2019; Wu et al. 2018; Guo et al. 2019). Generally, it is known that dust particles are mostly emitted from dry ground surfaces when they are thrown up by the wind and tools exemplified Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10311-020-01025-6) contains supplementary material, which is available to authorized users. * Rui Dai [email protected] * Hui Chen [email protected] 1
College of Biomass Science and Engineering, Sichuan University, Chengdu 610065, China
2
The Key Laboratory Leather Chemistry and Engineering (Sichuan University), Ministry of Education, Chengdu 610065, China
3
Lanbona Biotechnology Ltd, Chengdu 610042, China
by automobile tires (Inyang et al. 2016). Some researchers have reported that most dust emissions of construction sites originated from vehicles and construction equipment transferring at exposed area (Gambatese et al. 2001). Additionally, floating dust particles cause serious environmental contamination (Chen et al. 2020). In particular, particles of dust (PM2.5 and PM10) have caused serious injury to human health (Mukherjee and Agrawal 2017). These tiny particles can enter the body through breathing (Feng and Zhe
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