1.1. Release from Sediments

Try these first

1. 1.

   What is meant by mass balance in the context of sediments?

   Hint

   Think about how materials accumulate or deplete.

2. 2.

   Define diffusion.

   Hint

   Consider the natural tendency of particles.

3. 3.

   What drives the process of diffusion in sediments?

   • Temperature
   • Concentration difference
   • Pressure

   Hint

   Think about how particles naturally distribute.

4. 4.

   True or False: Effective diffusivity increases in denser sediment.

   • True
   • False

   Hint

   Consider how density may affect movement.

5. 5.

   Predict how introducing large quantities of solid material would alter diffusion rates in a sediment system.

   Hint

   Consider how pathways for diffusion are affected.

6. 6.

   Analyze a situation in which strong currents disrupt local equilibrium assumptions in a contaminated sediment site.

   Hint

   Examine how flow dynamics changes interactions.