CH 304K 1st Edition Lecture 3 Outline of Last Lecture I. Composition of air and concentration measurementsOutline of Current Lecture II. Another concentration unit: g/m3 II.III. Atmospheric pollutantsA. Carbon MonoxideB. OzoneC. Sulfur DioxideD. Nitrogen DioxideE. Particulate Matter (PM)III. Risk AssessmentCurrent LectureAnother concentration unit: g/m3 (micrograms per cubic meter)- Shows the mass of pollutant per volume of the sample- g= a millionth of a gram or 1x10-6gCarbon Monoxide, CO- gas- colorless and odorless- forms when carbon-containing materials are burnt with an inadequate oxygen supply (example: poorly-maintained furnace)- displaces the cycle of oxygen in bloodstream if inhaled; initial symptoms: dizziness, drowsinessThese notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.Ozone, O3 - allotrope of oxygen- gas- colorless, pungent odor- forms around electrical sparks (welding equipment, lightning, etc.)- affects lung function- critical component of atmosphere at a higher lever (10-30 miles above earth- Ozone layer)Sulfur Dioxide SO2- colorless, harsh odor- respiratory irritant; turns into acid in a moisture environment i.e. lungs- There are other oxides other than SO2, so the term SOX is used- Contributor to acid rainOxides of Nitrogen, NOX- Brown, sharp odor- Respiratory irritant, similar to SO2- Produced from nitrogen monoxide (NO)- NO forms when nitrogen and oxygen combine at very high temperatures- Contributor to acid rainParticulate Matter, PM- Fine particles of assorted materials- Any process that generates dusty material- Lung irritant- Components such as asbestos can cause cancer- Different sizes have varying risks; smaller particles are more dangerous because they are easier to inhale and easier to go further in respiratory systemRisk Assessment- Toxicity: intrinsic hazard that a substance possesses- Exposure: concentration and duration - Rate of breathing (i.e. is the person
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