Suppose a well has become contaminated by harmful bacteria such as E. coli. How can this be removed from an aquifer by natural subsurface processes?
A) dissolution, diagenesis, and fossilization
B) mechanical filtration, chemical oxidation, or assimilation by other organisms
C) overpumping for a few days until the well tests clean
D) asymptotic expansion

Question

Quizplus · Accepted Answer

Mechanical filtration, chemical oxidation, and assimilation by other organisms are natural subsurface processes that can remove contaminants like E. coli from water in an aquifer. Mechanical filtration can physically remove bacteria, chemical oxidation can chemically neutralize contaminants, and other organisms can naturally assimilate or outcompete harmful bacteria.

Suppose a Well Has Become Contaminated by Harmful Bacteria Such