CAJ | 학술논문

以纳米二氧化钛为光催化剂，研究了光催化降解染料废水溶液的动力学规律及溶液的pH 值、TiO2投加量和染料起始浓度对光催化降解活染料废水动力学的影响。结果表明，该反应符合Langmuir-Hinshelwood（ L-H）动力学模型，且光催化过程符合一级反应动力学方程，一级反应动力学常数（ K'）随溶液 pH 值及染料起始浓度的降低而增大；TiO2的最佳投加量为2.0 g/L，低于或超过该值都会导致降解速率的下降。
이납미이양화태위광최화제，연구료광최화강해염료폐수용액적동역학규률급용액적pH 치、TiO2투가량화염료기시농도대광최화강해활염료폐수동역학적영향。결과표명，해반응부합Langmuir-Hinshelwood（ L-H）동역학모형，차광최화과정부합일급반응동역학방정，일급반응동역학상수（ K'）수용액 pH 치급염료기시농도적강저이증대；TiO2적최가투가량위2.0 g/L，저우혹초과해치도회도치강해속솔적하강。
The dynamics of photocatalytic degradation of dyeing waste water has been investigated by using nano-TiO2 as photocatalyst. Furthermore,the effects of operation parameters such as initial dye concentra-tion,catalyst loading,and solution of the pH on the dynamics of photocatalytic degradation were dis-cussed. The results showed that the reaction accords with Langmuir-Hinshelwood( L-H)model and the reaction is a first-order reaction and the reaction kinetics constant( K')increase with the decrease of pH value and the initial concentration of dye. Meanwhile,the K' value would decrease when the addition of TiO2 is beyond or below the optimum amounts of TiO2 2. 0 g/L.