Organic pollutants - Sorption and transport

Question 1

Volatilization rates depend on:

Answer 1

• Intrinsic properties of the chemical
• Concentration
• Soil properties
• Environmental factors

Question 2

Volatilization rates depend on:

Answer 2

• Intrinsic properties of the chemical
• Concentration
• Soil properties
• Environmental factors

Question 3

Intrinsic factors that make compounds likely to volatilize

Answer 3

• Small in size
• Less polarity & polarizability
• Less soluble
• Higher vapor pressure
• Low boiling point

Question 4

Is it low or high concentrations that promote volatilization? Why?

Answer 4

Higher concentration

Entropy: Move from a place with high concentration to low

Question 5

How does soil properties increase (↑) volatilization?

Answer 5

↓ Organic material
↓ Moisture
↑ Sand

Question 6

How does environmental conditions increase (↑) volatilization?

Answer 6

↓ Humidity (moisture in air)

↑ Temperature
↑ Wind
↑ Sun

Question 7

How are hydrophobic organic pollutants tranported=

Answer 7

Strongly bound to dissolved organic carbon (DOC)

Question 8

What is the relationship between the retardation of a pollutant and its fraction in water?

Answer 8

↑↓ Fraction in water ↓↑ Retardation

Question 9

How quickly does a pollutant travel in water?

Answer 9

With the speed of DOC during facilitated transport