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Sources of Ambient Sulfur Dioxide (SO₂) in the Metro Atlanta AreaLowe, Miranda Jeanne 09 April 2007 (has links)
Sulfur Dioxide (SO2) is a difficult air pollutant to characterize spatially since it is primarily emitted from a few point sources typically having tall stacks. A better comprehension of the behavior and advection of ambient SO2 in metro Atlanta will help in the interpretation of epidemiologic analyses as well as establish an understanding of the source contributions to ambient SO2 in Atlanta.
The operation and SO2 emission characteristics of four coal-fired power plants and a coal-fired cement kiln, all of which lie in the vicinity of Atlanta, were examined. Data retrieved from three downtown Atlanta monitoring stations that record ambient SO2 concentrations were also examined. Trends from ambient SO2 data agree with emission trends from the four coal-fired power plants, suggesting that one or more of the power plants are contributing to the ambient SO2 in Atlanta.
SO2 rose plots using concentration and wind direction data from downtown monitoring stations were developed to identify from which direction the elevated levels of ambient SO2 were originating. A strong peak in the northwest direction of Atlanta suggests that Plant Bowen, Plant McDonough, or Lafarge Building Materials may be contributing to high concentrations of ambient SO2 in Atlanta. Further analysis concluded that Lafarge was not a likely contributor to the northwest peak. The plumes of Plant Bowen and Plant McDonough were modeled using air parcel trajectories and the Gaussian dispersion model. The results suggest that, when the wind is blowing from the northwest direction, Plant McDonoughs plume is the primary contributor to the elevated levels of SO2 recorded by downtown Atlanta monitoring stations.
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Remediation of chromium(VI) in the vadose zone: stoichiometry and kinetics of chromium(VI) reduction by sulfur dioxideAhn, Min 15 November 2004 (has links)
Immobilization and detoxification of chromium in the vadose zone is made possible by the existence of an effective reductant, SO2, that exists in a gaseous form at room temperature. Experimental studies were designed to characterize stoichiometry and
kinetics of chromium reduction both in aqueous solutions at pH values near neutrality and in soil.
First, batch experiments and elemental analyses were conducted to characterize the stoichiometry and kinetics of Cr(VI) reduction in water. The stoichiometric ratio of
S(IV) removed to Cr(VI) removed ranged between 1.6 and 1.8. The overall reaction is
believed to be the result of a linear combination of two reactions in which dithionate is
an intermediate and sulfate is the stable oxidized product. The reaction was also rapid,
with the half-time of about 45 minutes at pH 6 and about 16 hours at pH 7. A two-step
kinetic model was developed to describe changes in concentrations of Cr(VI), S(IV), and
S(V). Nonlinear regression was applied to obtain the kinetic parameters. The rate of
reaction was assumed to be second-order with respect to [Cr(VI)] and first-order with
respect to [S(IV)], and [S(V)]. The values for the rate coefficient for the first reaction
(k1) were found to be 4.5 (?10%), 0.25 (?9.4%) (mM-2h-1) at pH 6 and 7, respectively.
The values of the rate coefficient for the second reaction (k2) were 25 (?29%), 1.1 (?
30%) (mM-2h-1) at pH 6 and 7, respectively. The reaction rate decreased as pH
increased. Experiments showed that the rate at pH 7 was lower than that at pH 6 by one
order of magnitude.
Second, batch experiments and elemental analyses were conducted to characterize
the stoichiometry and kinetics of Cr(VI) reduction in soil. The stoichiometric ratio of
S(IV) removed to Cr(VI) removed was almost 2, which is slightly higher than that for
the reaction in water. This higher value may be due to S(IV) oxidation by soil-derived
Fe(III). The reaction was rapid, with the half-time less than 2 minutes, which is faster
than in water. The rate coefficients, k1 and k2, were 22 (?41%) and 13 (?77%) (M-2h-1), respectively.
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Statistical analysis on SO2, O3 and PM10 in Hong Kong /Wu, Wai Man. January 2003 (has links)
Thesis (M. Phil.)--Hong Kong University of Science and Technology, 2003. / Includes bibliographical references (leaves 76-77). Also available in electronic version. Access restricted to campus users.
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The photoelectron spectra and valence electronic structure of (η⁵ - C₅H₅) Mn (CO)₂ SO₂ and (η⁵ - C₅H₄CH₃) Mn (CO)₂ SO₂Campbell, Andrew Craig January 1979 (has links)
No description available.
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Development of an apparatus and analytical technique for the study of the reaction kinetics of sulfur dioxide oxidationCise, Michael David, 1943- January 1968 (has links)
No description available.
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Equilibrium partial vapor pressures over solutions of the diethylene triamine--sulphur dioxide--water systemRoberson, Alva Harold, 1900- January 1937 (has links)
No description available.
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Modeling of the low temperature reaction of sulfur dioxide and limestone using a three resistance film theory instantaneous reaction modelVisneski, Michael J. January 1991 (has links)
Thesis (Ph. D.)--Ohio University, March, 1991. / Title from PDF t.p.
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Reaction kinetics and mechanisms of low temperature SO₂ removal by dry calcium-based sorbentsBen-Said, Lotfi. January 1993 (has links)
Thesis (Ph. D.)--Ohio University, November, 1993. / Title from PDF t.p.
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Low temperature conversion of SO₂ to SO₃Tanneer, Srinivas R. January 2000 (has links)
Thesis (M.S.)--Ohio University, November, 2000. / Title from PDF t.p.
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Experimental studies of the homogeneous conversion of sulfur di-oxide to sulfur tri-oxide via natural gas reburningKhan, Ashikur R. January 1999 (has links)
Thesis (M.S.)--Ohio University, August, 1999. / Title from PDF t.p.
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