equilibrium concentration of chemicals in the organic solvent
decreased, and the eluted amount of chemicals from activated carbon
surface increased gradually. When the organic solvent was increased to a certain amount, the equilibrium concentration of
chemicals in the organic solvent no longer changed significantly,
so the eluted amount of chemicals as well as the regeneration efficiency
of activated carbon no longer changed correspondingly.
Based on these trends, we determined that the volume ratio of
n-pentane/activated carbon was best at 5:1 in this study.