Effect of CO2 on the adsorption of phenol and o-cresol on granular activated carbon

Abstract

Adsorption isotherms studies were performed for phenol and o‐cresol to study the effect of CO₂ on their adsorption on activated carbon under room temprature and controlled nuetral pH. Standard bottle‐point technique was used for two identical sets of bottles with the exeption that CO₂ was purged in one of them to insure its dominance over the other gases in solution. It was observed that CO₂ rcduceced the adsorptive capacity of activated carbon for both phenol and o‐crcsol significanyly. However, the effect on o‐crcsol adsorption was higher than that on phenol. Analysis of variance tables were constructed, F test was used to test the null hypothesis, and the results were statisticaly significant.