Adsoptivities of Polyethylene Glycol on Activated Carbon in Aqueous Solution

Abstract

The adsorption capacities of polyethylene glycol (PEG) whose molecular weights being 200-20000 were investigated at 25°C. The adsorptivities of PEG whose molecular weights being smaller than 1000 increased with increasing molecular weights due to a decrease in affinity for water. The adsorptivities of PEG whose molecular weights being 1000-7000 were almost the same, but the adsorptivity of PEG whose molecular weight being 20000 became very small due to a molecular sieving effect of activated carbon.