5.1. Control Volume Approach

Try these first

1. 1.

   What is the main difference between D-NAPL and L-NAPL?

   Hint

   Think about how they behave when spilled.

2. 2.

   Define 'dissolution' in the context of sediments?

   Hint

   How does a substance interact with water?

3. 3.

   What behavior characterizes D-NAPLs in water?

   • They float on the surface
   • They sink to the bottom
   • They evaporate

   Hint

   Think about their density relative to water.

4. 4.

   True or False: Dissolution occurs faster than diffusion in contaminated sediments.

   • True
   • False

   Hint

   Consider the processes involved.

5. 5.

   Consider a scenario where a large oil spill (L-NAPL) occurs in a river. Model the expected diffusion impact over the first week.

   Hint

   Address the concentration gradient in your model.

6. 6.

   A sediment sample shows a historical contamination layer. Propose a remediation strategy focusing on the dissolution of contaminants.

   Hint

   Consider the properties of the contaminants involved.