FACTORS REGULATING THE AIR-BORNE SPREADING OF POLLUTANTS FROM ROADS

Pollutants from roads are spread by mechanisms such as splash, spray and ploughing. In this study, the spreading was studied at two locations where information on the local weather was available and the amount of salt applied on the road could be obtained. When comparing the deposition of Na, Ca, K and Mg, the road-related gradient is obvious; the increase of sodium in the containers closest to the road is sometimes more than 1000-fold, and the increase of the other cations 10 - 100 fold. Also during a period of no de-icing the deposition of cations is higher towards the road. The deposition of Na is related to the amount of road salt applied, and also to wind and type and amount of precipitation. The increase of other cations could be an effect of weathering and/or ion-exchange on the fresh surfaces of the road.

• Corporate Authors:

  PTRC Education and Research Services Limited

  Glenthorne House, Hammersmith Grove
  London W6OL9,   England 
• Authors:
  • Blomqvist, G
  • JOHANSSON, E-L
• Conference:
  • Xth PIARC International Winter Road Congress
  • Location: Lulea, Sweden
  • Date: 1998-3-16 to 1998-3-19
• Publication Date: 1998

Language

• English

Media Info

• Features: Figures; References;
• Pagination: p. 459-468
• Serial:
  • Volume: 3

Subject/Index Terms

• TRT Terms: Environmental quality; Pollutants; Roadside; Salt fog tests; Sodium chloride; Spreading
• Uncontrolled Terms: Airborne
• Subject Areas: Environment; Highways; Maintenance and Preservation; I62: Winter Maintenance;

Filing Info

• Accession Number: 00751932
• Record Type: Publication
• Report/Paper Numbers: Technical Report, Volume 1, Volume 2
• Files: TRIS
• Created Date: Aug 13 1998 12:00AM