Abstract
The light intensity profiles in a rectangular aerated cell containing solids-dispersed water by light irradiation with a low-pressure mercury lamp were measured by highly sensitive photoprobes. The solids used were polystyrene particles having diameters from 1.1× 10-3m to 1.7×10-3m. The effective absorption coefficients were evaluated from observed light intensity profiles according to the diffusion-line source model, and were correlated with operating factors such as particle size and specific surface area of each phase.The observed rates of the photoreduction of potassium trioxalate ferrate in nitrogen bubbling solution agreed with those computed using the coefficients obtained from three-phase dispersions.
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