摘要
本文主要研究在模拟太阳光照射下酮洛芬的光降解.研究结果表明,酮洛芬的光解结果符合准一级动力学.由于酮洛芬在光解过程中有较高的量子产率及摩尔吸光系数,因此在光降解酮洛芬的过程中直接光解占主导地位.同时,猝灭实验表明,在酮洛芬的光解过程中·OH的贡献率仅为13.2%.此外,研究了模拟太阳光照射下水环境中一些环境因子如铁离子(Ⅲ)、氯离子和腐殖酸(HA)对酮洛芬光解的影响,实验结果证明,随着酮洛芬溶液中共存的Fe3+和HA浓度的增加,酮洛芬的降解受到抑制.而共存的Cl-在低浓度时促进酮洛芬的降解,当浓度不断增加时,促进酮洛芬降解的作用减弱.
This paper mainly studied the photodegradation of ketoprofen （KP） under simulated sunlight irradiation. The result showed that photolysis of KP followed pseudo first-order reaction kinetics. The direct photolysis was predominant in photodegradation of KP due to its high quantum yield and molar absorption coefficient. The quenching experiment demonstrated that the contribution of .OH was only 13.2%. In addition, the impacts of several environmental factors （Fe^3＋, Cl-and humic acid （HA）） on the photodegradation of KP was investigated under simulated sunlight irradiation. Increasing the concentration of Fe^3＋ and HA Low concentrations of C1^- accelerated the photodegradati weakened when the concentration of Cl-increased. decreased the photolysis efficiency of KP. on of KP. However, facilitation effect was weakened when the concentration of Cl^- increased.
作者
孔婧
邓芠
李若白
雷杰妮
刘国光
吕文英
KONG Jing DENG Wen LI Ruobai LEI Jieni LIU Guoguang LV Wenying(School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou, 510006, China)
出处
《环境化学》
CAS
CSCD
北大核心
2016年第12期2568-2574,共7页
Environmental Chemistry
基金
国家自然科学基金(21377031)
广东省科技项目(2013B020800009)资助~~
关键词
酮洛芬
光降解
量子产率
摩尔吸光系数
环境因子
ketoprofen, photodegradation, quantum yield, molar absorption coefficient,environmental factors.
