抄録
An experimental study on the adsorption properties of ground Soma sand was carried out by the following three methods.
(1) Wet (M.B.): methylene blue is adsorbed during grinding in the solution,
(2) Wet (H2O): methylene blue is adsorbed immediately after grinding in water,
(3) Dry: methylene blue is adsorbed immediately after grinding in air.
The results obtained through this experiment are as follows.
(1) As the time elapsed after grinding becomes longer, the adsorption activity of the solid surface becomes lower. So the adsorption on a newly produced surface at the instant of fracture must be distinguished from the adsorption on an old original surface.
(2) A method for determining the adsorption orientation of methylene blue was examined. The specific surface area of the ground Soma sand particles obtained by this new method was almost equal to that of the nitrogen adsorption method.
(3) The amount adsorbed on the surface increases with increasing the newly produced surface and approaches finally toward the value only due to the newly produced surface.
