Impact of gold smelter emissions on vegetation and soils of a sub-arctic forest-tundra transition ecosystem

Journal Article · Wed Feb 01 00:00:00 EST 1978 · J. Air Pollut. Control Assoc.; (United States)

DOI:https://doi.org/10.1080/00022470.1978.10470580· OSTI ID:5041730

Hocking, D ^[1]; Kuchar, P; Plambeck, J A; Smith, R A

---

1. Northern Forest Research Centre, Edmonton, Alberta

The generalized kinetic mechanism for photochemical reactions has been applied in the simulation of air quality at the Winnipeg International Airport. This mechanism treats hydrocarbons as lumped reactive or unreactive species (HC and URHC). Similarly peroxy radicals are lumped into a free radical species, RO/sub 2/ or HO/sub 2/. The basic mechanism includes reactions involving O, OH, HNO/sub 2/ plus the reaction products HNO/sub 3/ and RCHO, a generalized aldehyde. The four chemical species NO, NO/sub 2/, HC, and O/sub 3/ are treated as time dependent components, determinable by an equation of the type mentioned above. The remaining terms O, OH, HO/sub 2/, RO/sub 2/, HNO/sub 2/, are considered as pseudosteady state variables and are determined from similar equations with the time dependent derivative set equal to zero. The basic purpose of the study was to evaluate order of magnitude changes in airport air quality, as traffic volumes increase and aircraft use patterns change. Four studies of simulations of airport air quality based on several models of diffusion from stationary and moving sources are included for comparison with the reactor volume (BOX) model applied to the Winnipeg Airport. Emissions were determined at all five airports by the same basic procedures that included aircraft landing and take-off cycles, taxiing, automobile and truck traffic patterns, fuel consumptions, and heating plants in the case of the Canadian airports.

• OSTI ID: 5041730
• Journal Information: J. Air Pollut. Control Assoc.; (United States), Vol. 28:2
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
AIRPORTS
AIR QUALITY
AIR POLLUTION
AIRCRAFT
AUTOMOBILES
CANADA
FUEL CONSUMPTION
GAUSSIAN PROCESSES
HYDROCARBONS
NITROGEN OXIDES
OZONE
PHOTOCHEMICAL REACTIONS
PHOTOCHEMISTRY
SIMULATION
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISTRY
ENERGY CONSUMPTION
NITROGEN COMPOUNDS
NORTH AMERICA
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLLUTION
VEHICLES
500200* - Environment
Atmospheric- Chemicals Monitoring & Transport- (-1989)
560303 - Chemicals Metabolism & Toxicology- Plants- (-1987)