Lecture 23

Question 1

What are the 6 major pollutants?

Answer 1

Carbon monoxide, nitrogen dioxide, Sulphur dioxide, SPM, ozone, and lead

Question 2

Define Primary Pollutant

Answer 2

Pollutants emitted directly into the atmosphere in a already harmful form

Question 3

Define secondary pollutant

Answer 3

pollutants formed in the atmosphere from the interaction of two or more primary pollutants

Question 4

Describe Photochemical smog

Answer 4

smog created by the interaction of nitrogen oxides and VOC’s in the atmosphere under the influence of UV radiation
(worse in areas with higher temperature and sunlight)

Question 5

Describe industrial/grey smog

Answer 5

smog formed from the burning of oil and coals leading to high levels of Sulphur dioxide, sulphuric acid and SPM

Question 6

What treatment techniques are used to reduce air pollution

Answer 6

Tall smokestacks, filtration and taxation

Question 7

What methods are used to test water quality

Answer 7

• Dissolved oxygen (measures amount of oxygen)
• Biological oxygen demand (amount of oxygen consumed by aquatic decomposers)
• Chemical analysis (to determine amount of dissolved chemical compounds)
• Turbidity ( a measurement of the amount of suspended particles)