"Where is this huge amount of dust from ...?"? A long-standing simple question is scientifically elucidated

Even if it is said that dust is dusty, it may cause a failure of the personal computer,AllergenEven though I was leaving the house on a trip or even just cleaning a little bit of cleaning, I did not want to take my eyes off of the floor and furniture of the house, furniture and dust accumulated in large quantities on electric appliances Does not everyone have anything to wonder "from where?" From seeing.

It seems that scientists at the University of Arizona have clarified the "origin of dust" that was a question of human beings for many years. Surprisingly, most of the dust in the house comes from the outdoors.

Details are as below.Answering That Age-old Lament: Where Does All This Dust Come From?

University of ArizonaDr. David W. Layton of the School of Public Health and Associate Professor Paloma BeamerEnvironmental Science & TechnologyIn the paper published in the magazine, the dust of the family is "the skin peeled off from the human being", "the fiber that comes out from the carpet and upholstered furniture" "the soil brought in attached to the shoes" "the dust in the air flowing from the outside" It is said to be a gathering up including. Also, among these were transported indoors from outside air and soillead·ArsenicIt is pointed out that it is particularly worried for children who put dusts or other objects such as toys into the mouth .

Researchers analyze processes such as invasion and resuspension (mixing and dispersing) of polluted soil and dust in the air indoors by indoor behavior, cleaning and ventilation measurement and modeling We developed a framework for conversion and carried out measurement and analysis using this in the home in the Midwest of the United States. As a result, it turned out that more than 60% of the house dust was originally derived from the outdoors. It is estimated that nearly 60% of the arsenic contained in the dust on the floor is derived from the ambient arsenic and the rest are derived from the soil brought in on the shoes. Also, from the past lead contamination data of Sacramento, California, most of the lead in house dust seems to be derived from the atmosphere in the 1980s,Lead petrolThe supply source has changed due to the fact that it is no longer used, and it seems that most of soil-derived materials are currently considered.

Researchers say that this model could be used to reduce pollutants from dust and to evaluate methods for reducing human exposure to pollutants accordingly.

In Japan, which is a habit of taking off shoes indoors, soil-derived dust may not be as large as in the USA, but if most of dust comes from outside air, dust gathers more as you ventilate for fresh air, Is that what you mean ... ?.