The photocatalytic activity evaluation of submicron-sized pigmentary titania using the degradation of Rhodamine B under ultraviolet radiation in a slurry reactor was studied.The effects of titania concentration,Rhodamine B concentration,and wavelength and power of the light source on reaction rate were investigated.The optimal operation conditions for evaluating the photocatalytic activity of pigmentary titania particles were determined.The experimental results showed that the photocatalytic degradation of ...