光-Fe3+-草酸体系中对氯苯酚的冰相光转化

本文利用室内低温反应装置研究了在模拟太阳光-Fe3+-草酸作用下冰相中对氯苯酚（4-CP）的光转化。结果表明，Fe3+-草酸存在条件对冰相中4-CP的光转化有促进作用。Fe3+和草酸初始浓度、Fe3+与草酸的初始浓度比以及初始pH值对体系中4-CP的转化率具有较大影响。当溶液初始pH值为6.50，Fe3+和草酸的初始浓度比是1/5，草酸初始浓度为0.80mmol/L时，4-CP光照7.5h转化率可达39.1%。在光转化过程中，TOC的转化率滞后于4-CP的光转化率。4-CP的光转化符合一级动力学模型。分别利用直接萃取法和衍生化法富集了反应中间产物，并采用GC-MS进行了分析，据此推断了冰相中模拟太阳光-Fe3+-草酸作用下4-CP光转化的反应机理。

Photoconversion of p-Chlorphenol in Photo-Fe3+-oxalic Acid System in Ice

This work investigated the photoconversion of para-chlorphenol (4-CP) in simulated sunlight - Fe3+ - oxalic acid system in ice using self-made low temperature device. The results showed that in the presence of Fe3+ and oxalic acid, the photoconversion of 4-CP was accelerated in ice. The initial concentration of Fe3+ and oxalic acid, the ratio of the initial concentration of Fe3+ and oxalic acid, and the initial pH value had significant influence on the photoconversion of 4-CP. The photoconversion rate of 4-CP reached 39.1% after irradiation for 7.5 h when the initial pH value was 6.5, the ratio of the initial concentration of Fe3+ and oxalic acid was 1/5, and the initial concentration of oxalic acid was 0.8mmol/L. During irradiation, the conversion rate of TOC was lower than that of 4-CP. The photoconversion of 4-CP obeyed the first order kinetics equation. The photoproduct of 4-CP were enriched through direct extraction and derivatization respectively, and then analyzed by GC-MS. Accroding to the outcome, the photoconversion mechanism was deduced in the simulated sunlight - Fe3+ - oxalic acid system in ice.