Road Dust Control

Posts Tagged ‘micrometers’

Fugitive dust is a specific problem that is created by people when interacting with their natural environment. This is not a manmade pollutant. This dust is not emitted from any chimney, smoke stack or vent. Instead, this is a small solid or liquid particle that arises from the soil every time a person, animal, wind or object passes over it and disturbs it. A good example of this is a sand storm.

Fugitive dust is a persistent challenge in the dry areas of the western part of the US. This issue develops wherever long dry conditions exist and the moisture has dried from the top soil.

This has become an area of concern for those who suffer from respiratory problems. The size of the average dust particle is 10 micrometers or less. This small size particle can remain airborne for days or even weeks, depending on the wind conditions. Because of the particle’s small size, it has the ability of entering the respiratory system of people. This is the reason for concern. This small, but hard particle can damage the lungs and cause long term respiratory problems.

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Environmental protection officials in Beijing have had an easy time since the Olympics last summer.

The city recorded fewer polluted days following its smog-cleaning campaign for the Olympics, and authorities last month announced that the city’s air quality has reached the highest level in decades after meeting its annual target for "blue sky" days one month ahead of schedule, for two consecutive years.

But the fact that Beijing’s air is now clean is bad news for reporters.

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The dust from a mine is significantly different from the dust you find in your home. Dust in your home primarily consists of dead skin while mine dust is almost exclusively a mineral in a fine powder form.

Most written definitions of mine dust include the following: dust from drilling, blasting, smashing or handling of rock. The majority of the dust created by one of these activities are too large to stay in the air for an extended period of time and account for about 40 percent of all dust created at a mine site. The remainder is less than 10 micrometers in size. The majority of these particles is less than 2.5 micrometers and come from the exhaust of equipment used on the mining site.

The smallest size particle is what is most hazardous to the population’s health. The larger dust particles are an eye sore and are cost a lot to clean up, but are less hazardous to one’s health.

The smaller particles do make certain health hazards that include respiratory problems due to the fact that they are in the air that is breathed in to the lungs. This can be minimized if mining personnel were to wear masks designed to filter out the dust.

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