3. Estimation of Flux from Sediment to Water

Try these first

1. 1.

   Define flux in your own words.

   Hint

   Think about flow across surfaces.

2. 2.

   What does DNAPL stand for?

   Hint

   Consider the terms dense and non-aqueous.

3. 3.

   What does DNAPL stand for?

   • Dense Non-Aqueous Phase Liquid
   • Dissolved Non-Aqueous Phase Liquid
   • Dense Nitrate Aqueous Phase Liquid

   Hint

   Break down the terms - what does each part indicate?

4. 4.

   True or False: The mass transfer coefficient is the same for all substances.

   • True
   • False

   Hint

   Consider the differences in substance properties.

5. 5.

   Considering a river contaminated with DNAPL, if the mass transfer coefficient is estimated to be 0.1 cm/hr and the concentration gradient is found to be 5 mg/L, calculate the flux. Show all steps involved.

   Hint

   Pay close attention to unit conversions and apply the formula systematically.

6. 6.

   Devise a plan to assess the flow of a new contaminant into a sediment, accounting for environmental factors like water velocity and temperature. Identify what data you would need.

   Hint

   Consider how environmental factors interact with contaminant properties during your assessment.