高等学校化学学报

高等学校化学学报 ›› 2013, Vol. 34 ›› Issue (8): 1971.doi: 10.7503/cjcu20120974

• 物理化学 • 上一篇    下一篇

六氯苯在水相、冰相和有机相中的光化学转化

刘汉飞, 杨婷, 康春莉, 李林璘, 李哲, 刘佳, 陈柏言   

  1. 吉林大学环境与资源学院, 地下水资源与环境教育部重点实验室, 长春 130021
  • 收稿日期:2012-10-27 出版日期:2013-08-10 发布日期:2013-07-19
  • 通讯作者: 康春莉,女,博士,教授,博士生导师,主要从事环境化学和环境污染与控制化学研究.E-mail:kangcl@jlu.edu.cn E-mail:kangcl@jlu.edu.cn
  • 基金资助:

    国家自然科学基金(批准号: 41073063)资助.

Photoconversion of Hexachlorobenzene in Water, Ice and Organic Phase

LIU Han-Fei, YANG Ting, KANG Chun-Li, LI Lin-Lin, LI Zhe, LIU Jia, CHEN Bai-Yan   

  1. Key Laboratory of Groundwater Resources and Environment of the Ministry of Education, College of Environment and Resources, Jilin University, Changchun 130021, China
  • Received:2012-10-27 Online:2013-08-10 Published:2013-07-19

PDF (PC)

被引次数

7

摘要：

以低压汞灯为光源研究了六氯苯(HCB)在水相、 冰相和有机溶剂中光转化的动力学过程, 分析了反应产物, 探讨了反应机理, 考察了H2O2, NO2-, Fe2+对水相/冰相中HCB光转化的影响. 结果表明, 在低压汞灯照射下, HCB在3个体系中的光转化速率大小为有机相>水相>冰相; H2O2 促进水相中HCB的光转化而抑制冰相中HCB的光转化; NO2-对HCB在水相/冰相中的光化学转化均起抑制作用; Fe2+对水相中HCB的光转化有促进作用, 而对其在冰相中的光转化无影响; 六氯苯在3个体系中光转化的机理均为逐级脱氯过程.

关键词: 六氯苯, 光转化, 反应介质, 动力学, 反应机理

Abstract:

The photoconversion kinetics of hexachlorobenzene(HCB) was studied under UV irradiation by using low-pressure mercury lamp as light source. The photoproducts were analyzed and on this basis the photoconversion mechanism was proposed. Also, the effects of H2O2, NO2-, Fe2+ on the photoconversion in water/ice were investigated, respectively. The results show that the photoconversion rates of HCB in the three systems under the irradiation changed as follows: organic phase>water>ice; H2O2 promotes the photoconversion of HCB in water but inhibits it in ice; NO2- has inhibition effect on the photoconversion of HCB both in water and in ice; Fe2+ promotes the photoconversion of HCB in water but has no effect in ice; the photoconversion mechanism of HCB is a step-by-step dechlorination process.

Key words: Hexachlorobenzene, Photoconversion, Reaction medium, Kinetics, Reaction mechanism

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