2.2. Dense NAPL Spill on Sediment

Try these first

1. 1.

   What does DNAPL stand for?

   Hint

   Remember, it's related to spill scenarios in water.

2. 2.

   Why does a DNAPL sink in water?

   Hint

   Think about how the atom arrangement affects density.

3. 3.

   What characteristic defines a DNAPL?

   • Lighter than water
   • Heavier than water
   • Same density as water

   Hint

   Think about what happens when you pour oil in water.

4. 4.

   True or False: Mass transfer only occurs in still water.

   • True
   • False

   Hint

   Consider a river current compared to a pond.

5. 5.

   A barge spills chlorinated solvent into a river. Describe the expected behavior of the solvent and the implications for sediment.

   Hint

   Consider the properties of both the solvent and the river's flow.

6. 6.

   Calculate the flux of a DNAPL from sediment to water given the concentration in sediment as 200 mg/L and equilibrium concentration in water as 50 mg/L with a mass transfer coefficient of 0.1 cm/s.

   Hint

   Think about what a negative flux can imply in terms of movement.