A study of the spray atomization and suppression of tunnel dust pollution based on a CFD-based simulation

Guo, Cheng; Nie, Wen; Xu, Chen; Peng, Huitian; Zhang, Chuanchang; Li, Shenlong; Ning, Yue; Liu, Zhiqiang; Yang, Shibo; Ma, Qingxin; Li, Minghui

doi:10.1016/j.jclepro.2020.123632

Cited by 60 publications

(5 citation statements)

References 53 publications

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“…For example, Tomb et al [ 7 ] used experimental methods to study and determine the effect of spray water droplets on dust suppression; the result showed good dust suppression efficiency under the best spray conditions. Similar results were obtained by Zhou et al [ 8 ] and Guo et al [ 9 ]. However, these researches mainly focused on spray atomization, which increases the air humidity to increase the probability of coalescence among particles, so as to analyze the dust suppression effect as it is difficult to mitigate construction dust particles when they are fully spread.…”

Section: Introductionsupporting

confidence: 91%

The Evaluation of Construction Dust Diffusion and Sedimentation Using Wind Tunnel Experiment

Zhang

Tang

et al. 2022

Toxics

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A large quantity of particulate matter is generated during construction of civil engineering projects, which has a negative effect on the atmosphere and environment. In order to explore the concentration, distribution and diffusion of particulate matters generated from construction dust with different moisture contents, a wind tunnel experiment was conducted, and the effects of wind speed and moisture content on the inhibition rate, drifting distance and suppression percentage of particulate matters were investigated. The results show that the peak concentration decreases with the increase in moisture content, compared with dry dust; the peak concentrations for 1%, 2% and 3% moisture content are reduced by 37.07%, 39.53% and 65.38%, respectively. The average concentrations in the cross-section decrease with the increase in the moisture content, resulting in an increasing tendency of the particle inhibition rate. The forecast drifting distance decreases with the increase in the moisture content; when the suspension percentage is 1%, the forecast drifting distances of dry dust, 1%, 2% and 3% moisture content are 641.58, 116.08, 19.33 and 3.82 km, respectively, for a 5 m/s wind speed. Considering that an increase in wind velocity will not only decrease the inhibition rate but also increase the drifting distance, the dust suppression method by increasing the moisture content in low and medium wind velocities is applicable. When the limit value of the particle suppression rate within a distance of 50 m is larger than 70%, construction activities are prohibited at any wind velocity for dry and 1% moisture content, and at wind velocities larger than 2 m/s and 4 m/s for 2% and 3% moisture content, respectively.

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Section: Introductionsupporting

confidence: 91%

The Evaluation of Construction Dust Diffusion and Sedimentation Using Wind Tunnel Experiment

Zhang

Tang

et al. 2022

Toxics

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“…These varying levels of effectiveness are dependent on several factors (Chen et al 2018 ). For example, the spray pressure (Guo et al 2020 ), the spray particle size (Ma et al 2020 ), and the droplet concentration (Li et al 2020a , b ) influence the dust control effect of a water misting system. Supplementary Sheet 4 highlights the factors influencing the effectiveness of the studied interventions.…”

Section: Discussionmentioning

confidence: 99%

A systematic review of the effectiveness of dust control measures adopted to reduce workplace exposure

Anlimah

Gopaldasani

MacPhail

et al. 2023

Environ Sci Pollut Res

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The recent increase in silicosis cases in several countries casts doubt on dust control practices and their effectiveness in preventing respirable crystalline silica (RCS) exposure. Apart from silicosis, RCS may lead to other illnesses, health-related quality of life losses for workers and their families, and economic losses for companies. Thus, this systematic literature review examined the effectiveness of interventions employed to prevent exposure to RCS and increase the use of dust control measures. The review used keywords related to dust control interventions to search seven databases. Search results were screened and extracted for synthesis. The narrative synthesis showed the extent of research investment in China. In several designs and combinations, the interventions utilized water, surfactant, foam, and air currents to reduce dust exposure. These interventions offer varying degrees of dust control effectiveness against RCS and respirable dust. Although evidence indicates that interventions significantly decrease dust concentration levels, the control measures in place may not effectively prevent workplace overexposure to RCS. The review found that education and training interventions are employed to improve dust controls and respiratory protective equipment (RPE) use. Also, marketing strategies promote the use of RPE. These interventions can increase the frequency of use of RPE and the adoption of best practice dust control measures. Interventions increase knowledge, awareness, and attitudes about RPE usage and generate positive perceptions while reducing misconceptions. However, the benefits obtained from an intervention may diminish after its implementation, indicating that the interventions may not continually motivate workers to adopt control measures or use RPE.

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“…Based on the research about the health impact assessment, dust monitoring [4,5], this study proposes a new dust suppression method that utilizes the CSLP method to reduce the average dust concentration exposed to workers. Compared with other common dust suppression methods in the construction and other industries, such as local exhaust ventilation (LEV), blower fans, wet methods, and dust masks [3,13,43,44], this method has many advantages. This method does not require any other special equipment and electricity power, which saves much cost and improves the sustainability of construction projects.…”

Section: Theoretical Implicationsmentioning

confidence: 99%

Reducing Construction Dust Pollution by Planning Construction Site Layout

Tao

Feng

et al. 2022

Buildings

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Many construction activities generate fine particles and severely threaten the physical health of construction workers. Although many dust control measures are implemented in the industry, the occupational health risks still exist. In order to improve the occupational health level, this study proposes a new method of reducing the construction dust pollution through a reasonable site layout plan. This method is based on the field measurement and dust diffusion law. The dust diffusion law can be fitted based on the field monitoring data. With diffusion law, the average dust concentration exposed to workers of different site layouts can be simulated. In addition, the cost of the dust control method is a concern for site managers. Therefore, the total transportation cost reduction is another optimization objective. Finally, the multi-objective particle swarm optimization (MOPSO) algorithm is used to search for an optimized site layout that can reduce dust pollution and transportation cost simultaneously. The result shows that average dust concentration exposed to workers and total transportation cost are significantly reduced by 60.62% and 44.3%, respectively. This paper quantifies the construction dust pollution and provides site managers with a practical solution to reduce the construction dust pollution at low cost.

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A study of the spray atomization and suppression of tunnel dust pollution based on a CFD-based simulation

Cited by 60 publications

References 53 publications

The Evaluation of Construction Dust Diffusion and Sedimentation Using Wind Tunnel Experiment

The Evaluation of Construction Dust Diffusion and Sedimentation Using Wind Tunnel Experiment

A systematic review of the effectiveness of dust control measures adopted to reduce workplace exposure

Reducing Construction Dust Pollution by Planning Construction Site Layout

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