Reduction of Air Pollutants

An experiment to evaluate the efficiency of wet and dry scrubber networks that filter particulate gas at different flow rates was conducted under different flow rate conditions. The results are shown below. Based on the data in the graph, which of the following methods would be most effective at removing the greatest amount of particulate matter from coal-burning power plant emissions?

• Dry scrubbers using a flow rate of 200 L/min are best suited to remove small particles.

• Dry scrubbers using a flow rate of 450 L/min are best suited to remove large particles.

• Wet scrubbers using a flow rate of 300 L/min are best suited to remove small particles.

• Wet scrubbers using a flow rate of 450 L/min are best suited to remove large particles.

Tags

NGSS.MS-ETS1-1

NGSS.MS-ETS1-2

NGSS.MS-ETS1-3

In addition to a nearby mountain range, which of the following environmental conditions would be required for the process in the diagram to occur?

• A cool sea breeze and a high pressure system

• A warm mountain breeze and a low pressure system

• A cool sea breeze and a low pressure system

• A cool mountain breeze and a high pressure system

Tags

NGSS.MS-ESS2-5

NGSS.MS-ESS2-6

Which pollutants result from fossil fuel combustion (list all that apply)?

• Sulfur Dioxides

• Nitrogen Oxides

• Carbon Oxides

• Stratospheric Ozone

• Particulate Matter

Tags

NGSS.MS-ESS3-4

Which pollutants can be harmful to human respiratory systems (list all that apply)?

• Sulfur Dioxides

• Nitrogen Oxides

• Particulate Matter

• Stratospheric Ozone

• Volatile Organic Compounds

Which pollutants are associated with the formation of smog (list all that apply)?

• SO_x

• VOC

• O₃

• NOx

• PM

Tags

NGSS.MS-ESS2-5

What are the 2 sizes of Particulate Matter that the EPA classifies? Which is more dangerous, and why?

What are the main air pollutants generated as a result of industrial agriculture?

• VOCs

• NO_x

• O₃

• PM

• SO_x

What are the 6 “criteria pollutants” monitored by the EPA?

What are some natural sources of NO_X emissions? (list all that apply

• Forest fires

• Lighting

• Gas stoves

• Bacterian action in soil

• Electricity generation (coal-fired power stations)

Which of the following technologies is most effective in reducing sulfur dioxide emissions from coal-fired power plants?

• Electrostatic precipitators

• Flue-gas desulfurization

• Catalytic converters

• Baghouse filters

Tags

NGSS.HS-ESS3-4