What’s really is household dust?
Friday, February 26th, 2010 | Uncategorized | No Comments
The following report from David Layton and Paloma Beamer, professors of environmental policy at the University of Arizona, shows the importance of cleaning your carpet, upholstery and other flooring for health reasons. Eco Clean of Knoxville has speciality cleaning processes to help improve indoor air quality and health.
As a general rule, the majority of household dust — about 60% — comes from outside, through windows, doors, vents and, significantly, on the soles of your shoes. Smaller dust particles — from 28 to 49 microns, or thousandths of a millimeter — tend to stay on your shoes. The rest is shaken off inside. A higher share of the dust that floats in the air gets deposited, but again, there’s a lot that determines how much any one home will get.
“Here in Arizona,” says Beamer, “where we leave our windows open most of the year and have an arid climate, we would probably have a higher ratio.” Industrial centers or sooty cities have plenty of dust too, though for different reasons.
There’s not much to fret about in simple particles of dirt or organic materials such as pollen (though they can trigger allergies), but lead, arsenic and DDT can be a more serious matter. About one-third of the arsenic in the atmosphere comes from natural sources — volcanoes principally. The rest comes from mining, smelting, burning fossil fuels and other industrial processes. Even in relatively low concentrations, arsenic is not without risk, especially to small children who play on the floor and routinely transfer things from their hands to their mouths. The same is true for lead, which comes less from wall paint — the source most people would expect — than from auto exhaust, smelting and soil deposits. “Lead loading on floors is a key determinant of blood-lead levels in children,” Layton and Beamer wrote in their paper.
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David Gargan
Owner