Which of the following is NOT a factor to consider when determining the rate of neutralization?

Determining the rate of neutralization involves several environmental parameters that can affect chemical reactions and biological processes in aquatic systems. The volume of inflow is relevant because it influences the concentration of any substances that need to be neutralized and can change the overall water chemistry. Water temperature is another critical factor; it affects the kinetics of chemical reactions and the solubility of gases and ions, which can impact the effectiveness of neutralization agents. Water turbidity is also significant as it may influence light penetration and the effectiveness of certain treatment methods involving photosynthesis or chemical reactions.

The presence of invasive species, while important in the context of overall ecosystem health and management actions, does not directly influence the specific chemical dynamics or the rate of neutralization itself. Therefore, it is appropriate to conclude that the presence of invasive species is not a factor that determines the rate of neutralization in this context.