2. Transport of Pollutants - Introduction

Try these first

1. 1.

   Define concentration in the context of environmental science.

   Hint

   Think about how substances are measured in liquids.

2. 2.

   What is the mass balance equation?

   Hint

   Remember it counts both adding and removing substances.

3. 3.

   What is the fundamental quantity of interest in pollutant transport?

   • Temperature
   • Concentration
   • Pressure

   Hint

   Think about what we measure to assess pollution.

4. 4.

   True or False: A mass balance can only be applied to stagnant systems.

   • True
   • False

   Hint

   Consider how we analyze rivers.

5. 5.

   A lake receives waste at a constant rate of 5 mg/L/day and evaporates at 1 mg/L/day. If the initial concentration is 10 mg/L, determine the concentration after two days.

   Hint

   Consider the rates of addition and loss for total concentration.

6. 6.

   In a river, two tributaries contribute pollutants at different concentrations. If tributary A contributes at 20 mg/L and tributary B at 30 mg/L, how do you model these inflows into one segment of the river?

   Hint

   Think about how to account for different influences based on their volumes!