APFIVE Diffusion Equation for Pollutant Dispersion
Which of the following is an example of modeling pollutant dispersion using the diffusion equation $$\frac{\partial C}{\partial t}=D*\frac{\partial^2 C}{\partial x^2}$$?
A
A mechanical treatment process that removes contaminants via rapid filtering without considering natural dispersion.
B
A sedimentation process where gravitational settling of particles occurs independently and is not described by diffusion dynamics.
C
A point source discharge where pollutants are instantly and uniformly mixed throughout the entire water body.
D
Pollutants spreading from a chemical spill in a river naturally diffusing over time in accordance with the diffusion model.
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