Fan Zhi-yun, Huang Jun-li, Wang Peng, Su Li-qiang, Zheng Yong-jie, Li Ying-jie
School of Municipal and Environmental Engineering, Harbin Institute of Technology, Harbin 150090, China.
Huan Jing Ke Xue. 2004 Jan;25(1):95-8.
Reaction kinetics of aniline oxidation with chlorine dioxide in water were investigated systematically by detecting concentrations of aniline with HPLC at regular intervals. Results showed that the reaction was first-order with respect to both chlorine dioxide and aniline, and the entire reaction was of second-order. Under condition of pH 6.86 and water temperature (Tw) 287 K, the second-order reaction rate constant k was 0.11 L x (mol x s)(-1). Reaction activation energy was 73.11 kJ x mol(-1), revealing that the reaction could take place under usual water treatment conditions. The reaction rate constants in acidic and alkali media were greater than that in neutral medium. Effect of chlorite ion on the reaction rate was insignificant. P-aminophenol and azobenzene were detected by GC MS as intermediates. Oxidation pathways were proposed and discussed elementarily.
通过定期用高效液相色谱法检测苯胺浓度，系统研究了水中二氧化氯氧化苯胺的反应动力学。结果表明，该反应对二氧化氯和苯胺均为一级反应，整个反应为二级反应。在pH 6.86和水温（Tw）287 K的条件下，二级反应速率常数k为0.11 L×(mol×s)⁻¹。反应活化能为73.11 kJ×mol⁻¹，表明该反应在常规水处理条件下可以发生。酸性和碱性介质中的反应速率常数大于中性介质中的反应速率常数。亚氯酸根离子对反应速率的影响不显著。通过气相色谱-质谱联用仪检测到对氨基苯酚和偶氮苯为中间产物。提出了氧化途径并进行了初步讨论。
