Air quality monitor
may detect pollution
The air you breathe can be poisonous even if you can’t see or smell
the pollutants. But the danger will remain, until sensitive monitors are
developed to detect the pollution.
University scientist Dr. Russell Donnelly is working on such an air
quality monitor.
Donnelly, physics department chairman, won a federal grant of
$70,000 for the project from the National Science Foundation in a
competition for “problem-oriented research proposals of high merit.”
Two other physics proposals were accepted including a Stanford
project for a meson beam for cancer therapy and a Brookhaven
project for superconducting power transmission.
The NSF money will allow Donnelly to perfect his method of cap
turing pollutants by freezing them out of the air and “plating” them
onto a cold surface, from which they can be removed and measured.
The University physicist has been working on research related to air
pollution, in addition to his regular research in low-temperature
physics, since he came to Oregon from Chicago in 1966. He then
discovered the Willamette Valley’s problems with pulp mill odors.
Weyerhaeuser Company gave the University some $100,000 from
1967 to 1970 for Donnelly to try treating gas streams containing very
small quantities of highly unpleasant odors with his low temperature
techniques.
“The company wanted to find out,” explains Dr. Donnelly, “whether
cryogenic (low temperature) systems would remove pulp mill odor
and if so, whether it was commercially feasible.”
The answer to the first question, he learned very quickly, was
definitely yes.
“The University developed cold trap,” he notes, “could remove all
objectionable odors, having an output which could be freely
breathed.”
But the answer to the second question was no-not because of the
terrific cooling required, but because the gases come from the
recovery furnace so wet that the cost of condensing the water before
starting deep cooling is too high.
“One can imagine,” points out Dr. Donnelly, “that as technology
develops, cold traps may be brought into line financially even for pulp
mills.”
The research thus changed direction—from treatment to detection.
Now, with the NSF funds, Donnelly is developing his cold traps to
extend the sensitivity of detectors.
Existing detectors can discover somewhere in the vicinity of a few
parts per million of a pollutant in air.
Donnelly and his assistants, Dr. John C. Cooper and Michael
Cromar, hope to extend analysis techniques 100 to 1000 times—to the
parts-per-billion range.
That’s why the Donnelly laboratory in the University science
building sometimes smells like rotten cabbage or a pulp mill. Air
streams containing these gases are being passed over pipes of inex
pensive byproduct nitrogen, chilled to 77 degrees above absolute zero.
[ On Campus 1
Senate tabs committee appointments
Committee appointments will be the main item on the short
agenda for today's ASUO Senate meeting.
According to Senate President Stephanie Larsen, the ap
pointments will include senators and nonsenators for the seven
committees.
Also to be discussed are two constitutional amendments on
elections and apportionment.
The meeting will beat 7p.m. in 101 EMU.
Seminar hour-requirement changed
“Seminar: Teachers Guide to the Draft,” a new SEARCH course
this fall, is open to all students who have three hours of education
courses, rather than five hours as was reported in the SEARCH time
schedule. SEARCH director Jeff Jefferson says the three hour
requirement is “negotiable."
Those interested in enrolling should contact Nancy Binder at ext.
4308
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