1.2. Other Mechanisms of Chemical Release From Sediments – Part 2

Try these first

1. 1.

   Define diffusion.

   Hint

   Think about how perfume spreads in a room.

2. 2.

   What does resuspension do?

   Hint

   Consider stirring up mud in a puddle.

3. 3.

   What is the primary mechanism for movement in sediments?

   • Diffusion
   • Advection
   • Bioturbation

   Hint

   Think about how molecules naturally move.

4. 4.

   True or False: Resuspension can improve water quality.

   • True
   • False

   Hint

   Consider the impact of stirring up sediment.

5. 5.

   How does the process of bioturbation impact the concentration of contaminants in a sedimentary environment? Provide a detailed explanation and examples.

   Hint

   Consider the role of living organisms in sediment ecology.

6. 6.

   Discuss how dissolved organic matter can influence the transport of pollutants in freshwaters. Use relevant scenarios to illustrate your points.

   Hint

   Reflect on the interactions between organic materials and pollutants in aquatic systems.