Solidifying dust suppressant based on modified chitosan and experimental study on its dust suppression performance

Liu, Yanghao; Nie, Wen; Hu, Jin; Ma, He; Hua, Yun; Wei, Wenle

doi:10.1177/0263617417713624

Cited by 104 publications

(25 citation statements)

References 12 publications

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“…Notwithstanding that there is a wide variety of soil stabilizing materials that facilitates soil strengthening and dust suppression, there is a need for alternatives with enhanced effectiveness and less T environmental impact. Within last two decades, extensive attention has been paid to use of biocompatible and bio-based products for dust suppression, including synthetic hydrogels, bio-polymers, and biologically mediated mineral precipitation (Bang et al, 2009;Chen et al, 2015;Kavazanjian et al, 2009;Liu et al, 2018;Meyer et al, 2011). Synthetic hydrogels and bio-polymers are attractive because of their water retaining ability and because their application typically does not require compaction (Chang et al, 2015c), which make them compatible with establishment of vegetation on the treated surface.…”

Section: Introductionmentioning

confidence: 99%

Durable and ductile double-network material for dust control

Tirkolaei

Hua

et al. 2020

Geoderma

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Dust generation is a worldwide issue due to its serious deleterious effects on the environment, human health and safety, and the economy. Although various dust suppression methods have been used for decades, some critical drawbacks in state-of-the-art technology still remain unsolved, such as short-lasting, ground water impact, and prone to water. This work reports a soil stabilizer based on non-toxic material and forms a ductile and durable double-network in soil, namely "D 3 soil stabilizer", which not only improves soil mechanical toughness of surface soil but also suppresses dust generation. A copolymer comprising hydrophilic and hydrophobic components combined with enzyme-induced carbonate precipitation is utilized as an in-situ gelation binder to soil particle. The tunable hydrophobic-to-hydrophilic component ratio minimizes undesirable soil matrix expansion and mechanical strength loss upon experiencing wet-dry processes, while still retains good water affinity. We further demonstrated controllable treatment depth by fine-tuning precursor composition, which is essential to minimize environmental impact. The double-network morphology with carbonate precipitate embedded uniformly in polymer matrix is observed via microscopic imaging. The nature of outstanding ductility, high durability against water, and good long-term stability were supported by systematic unconfined compressive strength (UCS) measurements on treated soil, which show strong inter-particles binding, good retention of peak strength, increased strain at peak strength, and increased toughness after soil samples have experienced wet-dry processes.

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Section: Introductionmentioning

confidence: 99%

Durable and ductile double-network material for dust control

Tirkolaei

Hua

et al. 2020

Geoderma

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“…These sensitivity indexes play a very important role in outburst risk prevention. In China, after years of application and verification, it is found that the outburst risk prediction index and its critical value are inconsistent with the actual outburst risk of the mine, which is the phenomenon of 'outburst occurrence with low index value' (Liu et al, 2018;Nandi and Walker, 1975;Yang et al, 2018). Cheng et al (2016) established the relationship between the gas desorption index drill cuttings Dh 2 and gas pressure in coal seams; Sun and Sun (2000) conducted a similar simulation study on the K 1 index in the laboratory and analyzed the results using a multiple regression method.…”

Section: Introductionmentioning

confidence: 99%

Determination of the sensitivity index and its critical value for outburst risk prediction: A case study in Fuxiang mine, China

Wang

Sun

et al. 2020

Adsorption Science & Technology

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Gas occurrence in coal seams shows zonation, and the outburst risk prediction index is significantly affected by coal seam gas. For different coal mine, the sensitivity of prediction index of outburst risk is inconsistent, and the different area of the same coal mine can present different sensitivities to the same index. In this study, we measured the industrial analysis of coals and determined the degree of outburst risk of each coal seam using coal samples with the particle size of 1 ∼ 3 mm. The relationships between the equilibrium gas pressure and gas desorption index of drill cuttings, between the desorption index of drill cuttings and the adsorption pressure, and between the critical values of the indexes of drill cuttings were also analyzed using the fuzzy clustering method. Based on the analysis of the particle size distribution of coal samples, the influence of grain size on the critical value of the drill cuttings desorption index was studied. The results showed that the critical values of the desorption index of drill cuttings were different under different adsorption equilibrium gas pressures, and those critical values increased with increasing adsorption equilibrium gas pressure. The desorption index of drill cuttings and adsorption equilibrium gas pressure had a linear relationship, and the higher the degree of outburst risk was, the greater the slope of the fitting function and the smaller the intercept; under the same gas pressure of adsorption equilibrium, there was a linear relationship between Δh2 and K1, and the higher the outburst risk of coal seam was, the smaller the slope of the fitting function and the greater the intercept. The drill cuttings desorption index Δh2 was more sensitive than the index K1. Under the same test pressure, the smaller the particle size of the coal samples was, the greater the value of desorption index of drill cuttings and the higher the outburst risk of coal seam. The research results have significant theoretical importance and practical value for the prediction and prevention of coal and gas outbursts in coal mines with similar occurrence conditions of coal seams.

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“…Overall, the chemical dust suppressant is highly favored considering its dust suppression effect, economic viability and environmental-friendliness, and therefore has a vast potential for future development [25][26][27][28][29][30]. The chemical dust suppressant functions effectively on open dust sources, and therefore this technology has been widely applied to those enterprises with a major generation of coal dust, such as railroad transportation departments, dumping sites and thermal power plants [31][32][33][34][35][36]. In recent years, the domestic and foreign research on chemical dust suppressant is shifting its focus to enhancing recyclability, environmental-friendliness, and efficiency [37][38][39][40][41][42].…”

Section: Introductionmentioning

confidence: 99%

Development of Environmental Friendly Dust Suppressant Based on the Modification of Soybean Protein Isolate

Nie

Zhang

et al. 2019

Processes

Self Cite

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Aiming to further improve the dust suppression performance of the dust suppressant, the present study independently develops a new type of biodegradable environmentally-friendly dust suppressant. Specifically, the naturally occurring biodegradable soybean protein isolate (SPI) is selected as the main material, which is subject to an anionic surfactant, i.e., sodium dodecyl sulfonate (SDS) for modification with the presence of additives including carboxymethylcellulose sodium and methanesiliconic acid sodium. As a result, the SDS-SPI cementing dust suppressant is produced. The present study experimentally tests solutions with eight different dust suppressant concentrations under the same experimental condition, so as to evaluate their dust suppression performances. Key metrics considered include water retention capability, cementing power and dust suppression efficiency. The optimal concentration of dust suppressant solution is determined by collectively comparing these metrics. The experiments indicate that the optimal dust suppressant concentration is 3%, at which level the newly developed environmentally-friendly dust suppressant solution exhibits a decent dust suppression characteristic, with the water retention power reaching its peak level, and the corresponding viscosity being 12.96 mPa·s. This performance can generally meet the requirements imposed by coal mines. The peak efficiency of dust suppression can reach 92.13%. Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) were used to analyze the dust suppression mechanism of the developed dust suppressant. It was observed that a dense hardened shell formed on the surface of the pulverized coal particles sprayed with the dust suppressant. There is strong cementation between coal dust particles, and the cementation effect is better. This can effectively inhibit the re-entrainment of coal dust and reduce environmental pollution.

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Solidifying dust suppressant based on modified chitosan and experimental study on its dust suppression performance

Cited by 104 publications

References 12 publications

Durable and ductile double-network material for dust control

Durable and ductile double-network material for dust control

Determination of the sensitivity index and its critical value for outburst risk prediction: A case study in Fuxiang mine, China

Development of Environmental Friendly Dust Suppressant Based on the Modification of Soybean Protein Isolate

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