Road dust is an important source of resuspended particulate matter (PM) but information lacking on the chemical composition ultrafine particle fraction (UFP; <0.1 µm). This study investigated metal concentrations in UFP isolated from “dust box” sweepings collected by City Toronto, Canada, using regenerative-air-street sweepers. Dust box samples expressway, arterial and local roads were aeros...

Development and evaluation of an operational SDS forecasting system for East Asia: CUACE/DUST C. H. Zhou, S. L. Gong, X. Y. Zhang, Y. Q. Wang, T. Niu, H. L. Liu, T. L. Zhao, Y. Q. Yang, and Q. Hou Centre for Atmosphere Watch & Services (CAWAS), Chinese Academy of Meteorological Sciences, China Meteorological Administration (CMA), Beijing 100081, China Air Quality Research Division, Science & Te...

Silica exists in both crystalline and noncrystalline forms, with crystalline silica being the hazard of concern. Silica, or silicon dioxide, exposure is associated with many occupations, including construction workers, laborers, miners, foundry workers, glassmakers, drywall finishers, bricklayers, and tuckpointers.(1) Crystalline silica occurs most commonly in the form of quartz, cristobalite, ...

The interaction of N2O5 with mineral dust: aerosol flow tube and Knudsen reactor studies C. Wagner, F. Hanisch, N. Holmes, H. de Coninck, G. Schuster, and J. N. Crowley Max-Planck-Institut für Chemie, Mainz, Germany now at: Bayerisches Staatsministerium für Umwelt, Gesundheit und Verbraucherschutz, Rosenkavalierplatz 2, 81925 München, Germany now at: International Laboratory for Air Quality and...

Many studies on concentration of heavy metals in street dusts have been conducted. However, the distribution of metals in the different particle size fractions, which compose the dust, has been much less studied. Some authors have showed the effect of particle size in heavy metal distribution and have indicated that concentration of metals in soils increases with decreasing particle size. Fine ...

the aim of this study is to determine the area affected by dust storms in different wind speeds using satelliteimages. in the first step, windy conditions of the sistan plain were analyzed using wind statistics data. next, fivestormy days of zabol city, indicating different wind speeds and horizontal visibilities during those storms, wereselected. then, high temporal resolution modis data was u...