The prospect of rising sulfur dioxide emissions from increased coal combustion presents risks, not only of acid rain, but also to health by inhalation of the SO(,2) and of sulfate aerosols which may enhance transport of dissolved SO(,2) and acid to the lung. This study was undertaken to determine the effects of ambient air, acidic sulfate aerosol, sulfur dioxide, and the combination of sulfur dioxide and aerosol on selected pulmonary function measurements after 20 minutes of exercise at 75%-80% maximal heart rate in a hot (36-19 degrees C) and humid (70%-90% RH) environment. Six male subjects between the ages 26 and 33 years with no pre-existing pulmonary or cardiovascular problems rode a stationary bicycle for 20 minutes during each exposure condition at a workload pre-set to assure that each subject would attain an average minute ventilation of 50-60 1/min (BTPS). Exposure to 2.5 p.p.m. sulfur dioxide alone led to a significant lowering of FVC, FEV1, and FEF50. Exposure to sulfur dioxide plus aerosol led to a significant decrease of FVC. Baseline comparisons reflected a significant decline in FVC, FEV1, FEF25, FEF50, FEF75, and FEF25-75 between the pre-ambient and post-exposure. This decline suggests a residual effect of the air pollutant exposures. Significant differences were also observed between the pre-aerosol and pre-sulfur dioxide exposures for FVC, FEV1, FEF50, and FEF25-75. / Source: Dissertation Abstracts International, Volume: 46-09, Section: A, page: 2617. / Thesis (Ph.D.)--The Florida State University, 1985.
| Identifer | oai:union.ndltd.org:fsu.edu/oai:fsu.digital.flvc.org:fsu_75645 |
| Contributors | JONES, DONALD LEE., Florida State University |
| Source Sets | Florida State University |
| Detected Language | English |
| Type | Text |
| Format | 193 p. |
| Rights | On campus use only. |
| Relation | Dissertation Abstracts International |
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