环境化学
康春莉,唐晓剑,郭平,高红杰,彭菲.H2O2存在条件下冰相中苯酚的光化学转化[J].环境科学学报,2009,29(5):1036-1041
H2O2存在条件下冰相中苯酚的光化学转化
- Photoconversion of phenol in ice in the presence of H2O2
- 基金项目：国家自然科学基金(No.20577014)
- 作者
- 单位
- 康春莉
- 吉林大学环境与资源学院, 长春 130012
- 唐晓剑
- 吉林大学环境与资源学院, 长春 130012
- 郭平
- 吉林大学环境与资源学院, 长春 130012
- 高红杰
- 吉林大学环境与资源学院, 长春 130012
- 彭菲
- 吉林大学环境与资源学院, 长春 130012
- 摘要：研究了在125W高压汞灯照射下,低温(-14～-12℃)反应装置中H2O2存在条件下冰相中苯酚的光转化反应,考察了冰相中苯酚光转化的影响因素以及光转化动力学过程.结果表明,冰相中苯酚光转化速率随着光强和H2O2初始浓度的增加而加快,随着苯酚初始浓度的增加而减慢;强酸条件促进了苯酚的光转化;苯酚的光解速率符合一级动力学模式.苯酚光解产物的GC-MS和LC-MS分析表明,苯酚在光解过程中主要发生了羟基化反应和偶联反应.
- Abstract：Using a 125Whigh-pressure mercury lamp as light source,the photoconversion reaction of phenol was studied at low temperature(-14～-12℃),when H2O2 was present in the water ice.The optimal conditions and dynamics of the photoconversion of phenol in water ice were investigated.The results show that the photoconversion rate of phenol increases rapidly with the initial concentration of H2O2 and light intensity,but decreases with the initial concentration of phenol.Stronger acid conditions facilitate the photoconversion of phenol.The photoconversion course follows first-order kinetics.The photoproducts detected by GC-MSand LC-MSindicate that hydroxylation and coupling reactions occurred in the course of photoconversion.
- Key words：phenol photoconversion H2O2 ice
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