Silica Dust Exposure and Efficacy of Dust Control System in Small Silica Flour Mills, India

2012 ◽  
Vol 3 (4) ◽  
pp. 28-31
Author(s):  
L.J.Bhagia L.J.Bhagia ◽  
◽  
S.L.Dodia S.L.Dodia ◽  
M.I. Shaikh M.I. Shaikh
Keyword(s):  
Control System ◽  
Dust Control ◽  
Dust Exposure ◽  
Silica Dust

Silicosis in rhinestone-manufacturing workers in South China

2019 ◽  
Vol 69 (7) ◽  
pp. 475-481 ◽  
Author(s):  
C Wen ◽  
X Wen ◽  
R Li ◽  
S Su ◽  
H Xu
Keyword(s):  
South China ◽  
Dust Control ◽  
Control Measures ◽  
Respirable Dust ◽  
Dust Exposure ◽  
Quartz Content ◽  
Total Dust ◽  
Silica Dust ◽  
Exposure Limit ◽  
And Control

Abstract Background Silicosis is caused by long-term exposure to silica dust. Crystal rhinestone workers can be exposed to high levels of silica dust and are at risk of silicosis. Aims To explore silicosis cases, silica dust exposure and control measures in a rhinestone factory in South China. Methods We extracted and analysed data on new silicosis cases reported to China’s occupational disease and occupational health information monitoring system between 2006 and 2012 from a rhinestone factory in South China. We measured the quartz content of bulk dust, static total and respirable dust samples. Results Ninety-eight silicosis cases were reported between 2006 and 2012. The mean duration of silica dust exposure was 9.2 years (range 3–16). Drilling and polishing workers accounted for 96 (98%) of cases. We collected 1479 static samples including 690 total dust and 789 respirable dust samples. Mean dust levels for drilling were 1.01 mg/m3 (range 0.20–3.80) for total dust and 0.51 mg/m3 (range 0.04–1.70) for respirable dust. Mean dust levels for polishing were 0.59 mg/m3 (range 0.20–2.10) for total dust and 0.28 mg/m3 (range 0.08–0.71) for respirable dust. Over a third [289/789 (37%)] of total dust samples and 129/690 (19%) respirable dust samples exceeded the national permissible exposure limit. Conclusion Exposure to silica dust, ineffective dust control measures and inefficient health surveillance may have contributed to the incidence of silicosis in the factory we studied. Identification of silica dust exposure and effective dust control measures would reduce the risk of silicosis in rhinestone workers.

The importance of lunar dust mitigation during future human led lunar missions

2021 ◽  
Author(s):  
Donald Hendrix
Keyword(s):  
Lunar Surface ◽  
Health And Safety ◽  
Dust Exposure ◽  
Space Suit ◽  
Lunar Dust ◽  
Silica Dust ◽  
Pass Through ◽  
High Level ◽  
Vacuum Systems ◽  
Lunar Missions

<p>With the Artemis mission set to launch in 2024, returning humans to the lunar surface for the first time in over half a century, it is imperative to ensure human health and safety on a variety of fronts. Lunar dust exposure is one of many areas of concern regarding astronaut health and safety. During the Apollo missions it was reported that lunar dust was a nuisance and induced allergic-like symptoms upon exposure. In addition, it was also reported that instruments became coated with dust that was difficult to remove, and that the dust adhered to everything and tore through space suit fabric. Numerous inhalation studies have determined that lunar dust is more toxic than analogous terrestrial materials but less so than silica dust. Apollo dust mitigation systems were successful on some missions but failed on others. As humans are to stay on the lunar surface for extended periods relative to the Apollo missions, it is vital to fabricate instruments that would address the lunar dust problem with greater reliability. There must be multiple steps to remove all lunar dust, including the ultra-fine <10 µm fraction which was the most difficult dust size to remove. There must be multiple steps regarding lunar dust removal including a chamber to remove dust and de-suit, and a vacuum with high level HEPA filtration to remove dust. The first chamber would be to filter out any dust that comes into the module from the outside. Once all the air is clear, then the next step would be to remove any remaining dust on the suits using a hand-held vacuum with a HEPA H14 filter which only allows up to a maximum 0.005% of particles 100 nm in size to pass through the filter. Then, it would be safe to de-suit. It would be wise to have a second chamber between the first chamber and the command center of the lunar module that would vacuum any remaining dust before opening to the main command chamber. Ultra-high quality HEPA filters of both the chamber and hand-held vacuum systems should be replaced frequently to maintain optimal dust mitigation. Investing time and resources into lunar dust mitigation should be a top priority for the upcoming Artemis mission to avoid the issues encountered on the Apollo missions.</p>

The Efficiency of Protective Hoods Used by Sandblasters to Reduce Silica Dust Exposure

AIHAJ ◽  
1975 ◽  
Vol 36 (2) ◽  
pp. 140-148 ◽  
Author(s):  
BEHZAD SAMIMI ◽  
ARTHUR NEILSON ◽  
HANS WEILL ◽  
MORTON ZISKIND
Keyword(s):  
Dust Exposure ◽  
Silica Dust

Numerical Simulation Study on Air-Flow Migration Law about Vortex Air Curtain of Plane Wall Fan Drum

2012 ◽  
Vol 241-244 ◽  
pp. 1285-1292
Author(s):  
Gang Zhou ◽  
Sen Cao ◽  
De Ming Wang ◽  
Wei Min Cheng ◽  
Wen Nie
Keyword(s):  
Numerical Simulation ◽  
Control System ◽  
Simple Algorithm ◽  
Plane Wall ◽  
Dust Control ◽  
High Concentration ◽  
Air Curtain ◽  
Working Face ◽  
Simulation Results ◽  
Migration Law

Vortex air curtain of plane wall fan drum can control the diffusion of air stripping dust effectively. In order to solve the high-concentration dust problem in fully mechanized excavation face, formation mechanism of vortex air curtain was analyzed. According to fluid mechanical control equations of gas phase flow, mathematical model was established to solve air migration law of vortex air curtain in fully mechanized excavation face. By using Simple algorithm based on collocated grid and fluent software, numerical simulation of air spatial migration law of closed-end dust control in fully mechanized excavation face was carried out. The simulation results show that vortex air curtain dust control system can form dust control fan drum along driving head to the front of the roadheader driver. According to the simulation results and actual conditions of working face field, vortex air curtain suction dust control system consisted of plane wall fan drum and exhausted dust purification device in fully mechanized excavation face was designed, and after it was applied in fully mechanized excavation face, the dust concentration decreased effectively in the working face field.

Silica dust exposure induces autophagy in alveolar macrophages through switching Beclin1 affinity from Bcl‐2 to PIK3C3

2020 ◽  
Vol 35 (7) ◽  
pp. 758-767
Author(s):  
Pan Yang ◽  
Ruirui Song ◽  
Ning Li ◽  
Kun Sun ◽  
Fan Shi ◽  
...  
Keyword(s):  
Alveolar Macrophages ◽  
Dust Exposure ◽  
Silica Dust

A new dust control system for foundries

AIHAJ ◽  
1978 ◽  
Vol 39 (1) ◽  
pp. 73-78 ◽  
Author(s):  
JOSEPH S. SCHUMACHER
Keyword(s):  
Control System ◽  
Dust Control

scholarly journals Developmentof anElectric-furnace Dust-control System

1962 ◽  
Vol 12 (12) ◽  
pp. 574-590 ◽  
Author(s):  
W. W. Campbell ◽  
R. W. Fullerton
Keyword(s):  
Control System ◽  
Dust Control

Global Occupational Hazard: Silica Dust

2012 ◽  
Author(s):  
Jennifer Cooper
Keyword(s):  
Occupational Safety ◽  
The United States ◽  
Crystalline Silica ◽  
Worker Safety ◽  
Dust Exposure ◽  
Exposure Limits ◽  
Policy Makers ◽  
Silica Dust ◽  
Airway Diseases ◽  
Safety Programs

One of the oldest industrial diseases, silicosis, results from exposures to respirable crystalline silica, also known as silica dust. Workers worldwide exposed to silica dust span a variety of industries from construction, mining, sandblasting, to masonry, and machinery. In the United States alone 1.7 million workers are exposed to crystalline silica, which can also lead to lung cancer, tuberculosis, and other chronic airway diseases [1]. This paper will examine the health effects of silica dust on the worker, discussing exposure paths, work groups affected, occupational safety measures, worker health policies, and compare these among the developed and developing world. Implementing worker safety programs, which include wearing Personal Protective Equipment (PPE) and health monitoring and developing exposure limits, can help mitigate the adverse health risks of working with silica dust. A comparison of the successes and limitations of several programs from around the world will show that strong national occupational safety programs can reduce the mortality and illness rates of silicosis due to occupational silica dust exposure. Without a strong national occupational safety program history shows that workers will remain unprotected until they rally together under tragedy to fight for safety. Before more workers suffer and die tragically and unnecessarily, global safety policy makers can take a lesson from history, examine and compare current programs, and implement strong national occupational safety programs that save lives.

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