关键词：酸性红染料废水；二氧化氯； 脱色率；动力学
Study on Dye’s Decolorization by ClO2
Abstract: Chlorine dioxide has strong property of oxidation, the instability and the disinfection. This article is based on the preparation of chlorine dioxide, the content of the acid red dye wastewater was after reaction determined by spectrophotometric methods, and thus decolourization rate of acid red dye wastewater was calculated with chlorine dioxide. Then the decolourization effect of the dye wastewater by reaction mixing speed, the amount of chlorine dioxide, pH, reaction temperature, initial concentration of dye wastewater, reaction time were studied. The experimental result indicated that, the mixing speed, initial concentration of the dye wastewater and reaction temperature are little influence to the decolourization rate. The reaction is very quick,The reaction would be completed within 10 minutes. Under the alkalinity condition, the larger pH is , the lower decolourization rate is,and the pH is out of scope is little influence to the decolourization rate. So the best condition are the followings: reaction temperature is 30℃, reaction time is 10min, rotational speed is 250r/min, pH is 6, the ratio of the acid red dye wastewater and a chlorine dioxide response is 3.17.To deal with the data of the experiment we get the result: the reaction is first order, and Arrhenius Equation is k=0.12e-231.11/RT, dynamic equation is r=kcA0.5cB0.5.
Keywords: Acid red dye wastewater; Chlorine dioxide; Decolourization rate;
Kinetics
