Abstract:
Dust is a general name for minute solid particles with diameters less
than 500 micrometers. On Earth, dust occurs in the atmosphere from various
sources; soil dust lifted up by wind, volcanic eruptions, and pollution are
some examples. Airborne dust is considered an aerosol and can have a
strong local radiative forcing on the atmosphere and significant effects on
climate. In addition, if enough of the minute particles are dispersed within
the air in a given area (such as flour or coal dust), under certain
circumstances can be an explosion hazard.
The dust can be an indicator of environment pollution, especially of
inside air. This is a heterogeneous mix, composed from organic and inorganic
particles and other chemical material. Dust in homes, offices, and other human
environments is mainly generated by the inhabitants (especially domesticated
pets such as dogs, cats and birds), and mainly from their skin cells that slough
off. Some atmospheric dust from the outdoors is also present. On average,
approximately 6 mg/m2/day of house dust is formed in private households,
depending primarily on the amount of time spent at home.
This study base on negative impact of daily exposure in contact with
the chemical compounds of the dust and, also, it refers to the danger
represented for the population health.
The research was carried out in Tg-Jiu municipality in three
crossroads with different pollution degree of trafic: high, medium and low. It
was performed analysis of PM2,5 mg/m3 concentration and heavy metals
contenue, at different hourly intervals, both in the street dust and also in the
household dust.
It was resulted that Hg with Cr, As and Mn are present in the street
dust, althought in househol dust appear just Hg.
