Portland State University. Department of Chemistry
Gary L. Gard
Date of Award
Master of Arts (M.A.) in Chemistry
1 online resource (vii, 49 pages)
Soil surveys -- Oregon -- Willamette River Watershed, Gases -- Absorption and adsorption, Carbon monoxide
Recent work indicates that microorganisms present in soils can remove carbon monoxide from the atmosphere and as such constitutes a major sink. B.E.T. adsorption studies were carried out on representative soils from the Willamette Valley River Basin in order to determine their adsorptive characteristics for carbon monoxide and other gases. Attempts were made to isolate, through a non-soildestructive sterilization, the adsorptive characteristics of the soil microorganisms as well as of the test soil.
The carbon monoxide studies show physical adsorption equivalent to the coverage of a few per cent of the surface area at 25.0° and 76 cm-Hg. Adsorption studies also shows that the soil rather then the microorganisms adsorbs most of the carbon monoxide. On sterilized soil, chemical sorption of oxygen was present and was probably caused by the oxidation of dead or damaged soil microorganisms. Hysteresis effects were present in all adsorption studies at 25.0° and appears to be a characteristic of the constituents of the soil and represents a new and as yet unexplained phenomenon.
Quale, Thomas R., "A Study of the Adsorption of Some Atmospheric Gases on Soils of the Willamette Valley River Basin" (1973). Dissertations and Theses. Paper 1998.