Samples are detected absorbane using UV-visble Spectrophotometer each 1 min to 10 min Results show that increasing 〖"Na" 〗_"2" 〖"CO" 〗_"3" in treatment system lead to decrease the reaction rate constant. We have found that reaction rate constant of dye solution ranging from 0, 10, 20, 30 and 50 g/L are 0.7599, 0.3231, 0.2962 and 0.2091, respectively.