A field study on grass field burning was conducted in the
Willamette Valley of Oregon during the summer of 1965. Approximately 243,000 acres of grass fields are burned in the valley during
August and September. Serious air pollution problems result from
this burning. The purposes of the study were to...
A study was conducted to determine what effects the type of
pollutants, storage conditions, storage time, and method of sample
conditioning have on the reported weight of an air pollutant collected
by filtration. Samples were collected from a refuse dump, an arc
furnace smelting nickel ore, and a rotary kiln...
Submicron particulate (mean size of 0.52 microns) was filtered
from air at substantially atmospheric temperature and pressure by
passing air up through a bed of fluidized glass shot in a two inch column.
Removal efficiency, defined as the percentage removal of
particulate from the air stream, was essentially constant during...
The "Teepee" type wood residue incinerator, similar to
many other sources, requires sampling at the point where the emissions enter the atmosphere. Because the location of the emission
point is hazardous and unpleasant for the operation of a sampling
probe, a portable, tilt-up column was developed which permitted installation, operation,...
The respiratory tract is lined with a mucous blanket which is
motivated by a ciliated epithelium. This blanket includes a lower
serous layer of fluid through which the cilia beat and an upper viscid
layer into which particulates from the inhaled air are deposited.
The movement of the mucous blanket...
A source test was conducted to determine the particulate and the
total gaseous hydrocarbon emissions from a gas heated veneer dryer.
Samples were taken on eight separate days from the exhaust stacks
while the dryer was processing Douglas fir veneer. Of the eight days,
three was used to determine the...
An integrating nephelometer was set up at the Eugene Airport
which is located five miles north of Eugene, Oregon, on Highway
99 West. Continuous atmospheric scattering coefficient readings
were obtained from July 1, 1969, to August 28, 1969. These data
are converted to meteorological range through the use of the...
The removal of ozone from an air stream by activated-cocoanut
charcoal was investigated from the literature and experimentally.
The experimental investigation showed that activated-cocoanut charcoal
can be used to remove concentrations of ozone less than 1.0
ppm with high efficiencies. The mechanism of the ozone removal
appeared to be a...
Many agricultural fields are burned in the Willamette Valley
of Oregon during the summer for economic reasons. A major air
pollution problem results from these burnings. The purpose of this
study was to develop relations between the maximum plume height
and some of the independent variables affecting this plume height,...
Ammonium chloride aerosols of submicron size generated by
condensation and dispersion methods were treated, shortly after aerosol
charging, with shock waves originating from diaphragm pressure
ratios of up to 5.75.
The fraction of the particulate matter remaining in suspension
after a given time was measured as an indication of coagulation...