6.1. Rate of Adsorption and Diffusion

Try these first

1. 1.

   What is the definition of mass balance?

   Hint

   Think about how we track materials in a process.

2. 2.

   What does effective diffusivity measure?

   Hint

   It's connected to how materials move in sediments.

3. 3.

   What role does effective diffusivity play in contaminant transport?

   Hint

   Consider how different media affect molecular transport.

4. 4.

   True or False: The local equilibrium assumption states that adsorption and diffusion can occur at significantly different rates.

   • True
   • False

   Hint

   Think about how equilibrium typically works in systems.

5. 5.

   If a contamination event occurs in a sediment environment with high porosity, explain the expected impacts on diffusion rates and mass transport over time.

   Hint

   Think about how initial conditions impact long-term scenarios.

6. 6.

   Design an experiment to test the validity of the local equilibrium assumption in a given porous medium. Outline your approach.

   Hint

   Consider the factors influencing flow and concentration over time.