Abstract:
:There is concern about the human health effects of inhalation of acid compounds found in urban air pollution. It was the purpose of this study to investigate three of these acid compounds, sulfur dioxide (SO2), sulfuric acid (H2SO4), and nitric acid (HNO3) in a group of allergic adolescent subjects. Subjects were exposed during rest and moderate exercise to 0.7 mumole/m3 (68 micrograms/m3) H2SO4, 4.0 mumole/m3 (0.1 ppm) SO2, or 2.0 mumole/m3 (0.05 ppm) HNO3. Pulmonary functions (FEV1, total respiratory resistance, and maximal flow) were measured before and after exposure. Preliminary analysis based on nine subjects indicates that exposure to 0.7 mumole/m3 H2SO4 alone and in combination with SO2 caused significant changes in pulmonary function, whereas exposure to air or SO2 alone did not. FEV1 decreased an average of 6% after exposure to H2SO4 alone and 4% when the aerosol was combined with SO2. The FEV1 decrease was 2% after both air and SO2 exposures. Total respiratory resistance (RT) increased 15% after the combined H2SO4 exposures, 12% after H2SO4 alone, and 7% after exposure to air. After exposures to HNO3 alone, FEV1 decreased by 4%, and RT increased by 23%. These results are preliminary; final conclusions must wait for completion of the study.
journal_name
Environ Health Perspectjournal_title
Environmental health perspectivesauthors
Koenig JQ,Covert DS,Pierson WEdoi
10.1289/ehp.8979173subject
Has Abstractpub_date
1989-02-01 00:00:00pages
173-8eissn
0091-6765issn
1552-9924journal_volume
79pub_type
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更新日期:1986-11-01 00:00:00
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journal_title:Environmental health perspectives
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更新日期:1989-02-01 00:00:00
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更新日期:2002-01-01 00:00:00
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journal_title:Environmental health perspectives
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更新日期:1989-07-01 00:00:00
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journal_title:Environmental health perspectives
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更新日期:1989-11-01 00:00:00
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journal_title:Environmental health perspectives
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更新日期:1983-03-01 00:00:00
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更新日期:2005-03-01 00:00:00
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更新日期:2017-09-14 00:00:00
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更新日期:2008-10-01 00:00:00
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更新日期:1994-11-01 00:00:00
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更新日期:1974-12-01 00:00:00
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