Diffusion coefficients of oxygen in three dilute polymeric aqueous solutions（sodium carboxymethyl cellulose, hydroxyethyl cellulose, polyvinyl alcohol） were measured under flowing conditions, and the influence of shear rate on diffusivity was investigated. The rheological properties of the three polymeric solutions were determined using a Couette-Hatschek viscometer. The absorption experiment was made in a wetted-wall column which was made of a stainlss steel tube, and was 16.5 mm, 55 mm in outside diameter and effective height respectively. The concentration of the physically absorbed oxygen was measured using Winkler titration method. Diffusivity enhancement was observed in the sodium CMC which was the most viscous of solutions experimented with in this study.