Abstract
The adsorption of water onto Fe2O3 and Al2O2 was investigated after mixing Fe2O3 powder and Al2O3 powder in the safflower oil with the water. The amount of adsorbed water was directly proportional to that of the Fe2O3 and increased exponentially with the amount of Al2O3 in the oil. The selective adsorption of structural water, unsymmetrically hydrogen bonded water and free water onto Fe2O3 and Al2O3 in this oil was measured by Near Infrared Spectrometry. Unsymmetrically hydrogen bonded water was adsorbed preferentially onto Fe2O3 and structural water with difficulty. Structural water easily adsorbed onto Al2O3 but free water did so with difficulty.
The adsorption of structural, unsymmetrically hydrogen bonded and free water onto Fe2O3 was more selective than that onto Al2O3.
