4. Modeling of Chemical Transport

Try these first

1. 1.

   What is diffusion?

   Hint

   Think about concentration gradients.

2. 2.

   What does resuspension refer to?

   Hint

   Consider what happens during a storm.

3. 3.

   What process describes the movement of particles through a concentration gradient?

   • Resuspension
   • Diffusion
   • Advection

   Hint

   Consider which mechanism is passive.

4. 4.

   True or False: Bioturbation can enhance the transport of pollutants in sediment.

   • True
   • False

   Hint

   Think about how organisms interact with sediments.

5. 5.

   Calculate the effective concentration of a chemical in a body of water given that a volume of 200L contains 2 grams of suspended solids with 4% organic contaminant.

   Hint

   Use ratios to solve.

6. 6.

   Describe how human activities can increase resuspension rates in aquatic systems and the resulting impacts on environmental quality.

   Hint

   Consider industrial practices and their outcomes.