摘要
主要研究了简单铈离子(Ce3+)在紫外光(UV)的作用下对蒽醌染料茜素绿(AG)的光催化降解效果和反应机理。结果表明,UV/Ce3+体系能够有效降解AG,初始反应速率随AG浓度的倒数值和Ce3+浓度的增加而线性增加,随初始溶液pH的增加先降低后增加,在酸性条件下有很高的TOC去除率。荧光探针实验表明,反应过程中可以产生·OH自由基。UV/Ce3+体系对其他类型染料和对硝基苯酚都有较好的降解效果。
The effect and mechanism of anthraquinone dye alizarin green （AG） degradation by Ce3＋ ions under UV irradiation were studied. It was found that the dye could be degraded efficiently by the UV/Ce3＋ sys- tem. The initial reaction rate increased linearly with the increasing of the inverse value of AG concentration and Ce3 ＋concentration, respectively ; while with the initial pH of the solution increasing, it first decreased dramatic- ally and then increased slowly. A high TOC removal rate was obtained under acid conditions. The fluorescent ex- periments showed that · OH radicals was produced during AG degradation. The UV/Ce3＋ system was also effi- cient for degradation of other organic dyes and p-nitrophenol.
出处
《环境工程学报》
CAS
CSCD
北大核心
2014年第2期448-452,共5页
Chinese Journal of Environmental Engineering
基金
国家自然科学基金资助项目(50978208)
关键词
铈离子
光催化
茜素绿
降解
羟基自由基
cerium ions
photocatalysis
alizarin green
degradation
·OH radical
