石墨电极E-Fenton法处理罗丹明B废水  

Rhodamine B wastewater degradation by graphite-graphite electro-Fenton system

作　　者：邱珊[1] 陈聪[1] 邓凤霞[1] 冀雅婉 丁晓 马放[1] 

机构地区：[1]哈尔滨工业大学市政环境工程学院,黑龙江哈尔滨150000 [2]上海城乡建筑设计院有限公司,上海200000

出　　处：《浙江大学学报（工学版）》2016年第4期704-713,共10页Journal of Zhejiang University：Engineering Science

基　　金：牡丹江流域面源综合整治关键技术研究与示范项目(2012ZX07201-002);国家自然科学基金资助项目(51208141)

摘　　要：采用电芬顿(Electro-Fenton)法处理罗丹明B(RhB)废水,分析石墨电极Electro-Fenton体系处理RhB废水的不同影响因素和机制.设计五因素四水平正交实验考察电压、溶液初始pH值、初始Fe2+浓度、极板间距等因素对RhB去除效率的影响.实验结果表明,Electro-Fenton降解RhB的最优条件为:电压为2V、初始pH值为2.5、初始Fe2+浓度为0.1mmol/L、极板间距为4cm.在该条件下反应60min后,RhB降解率最高达到98.59%.对反应溶液的中间产物进行三维荧光和高效液相色谱质谱(HPLC-MS)、紫外分析.结果表明:采用Electro-Fenton法处理60min后,在波长为554nm处RhB的吸光度为零,但仍存在荧光峰,且TOC去除率为33.3%,可以判断有一些有荧光的中间产物没有被完全去除.用HPLC-MS进行产物分析可知,可能的产物有C26H27O3N2(m/z=415)、C24H23O3N2(m/z=387)等物质.Electro-Fenton with graphite-graphite as the electrodes was applied to degrade wastewater containing Rhodamine B（RhB）.Both the influencing factors and mechanism were investigated.The effects of various operating factors including potentials,initial solution pH,Fe2＋concentration,electrode plates spacing were systematically investigated in order to obtain the optimized conditions for degradation of RhB under four levels orthogonal test of five factors.The optimum values were as follows：potential2V,initial pH = 2.5,Fe2＋concentration 0.1mmol/L,electrode plates spacing 4cm.The removal rate of RhB could reach to 98.59 % under the optimum conditions.Three-dimensional fluorescence,HPLCMS,UV were used to detect intermediate products of RhB during Electro-Fenton.Results showed that the absorbance at 554 nm by UV was almost zero,but fluorescence peak still existed.Removal rate of TOC was 33.3 %.Certain intermediate products that have fluorescence did not completely remove.Results from HPLC-MS proved that the following intermediate products produced in the Electro-Fenton,like C26H27O3N2（m/z=415）、C24H23O3N2（m/z=387）et al.

关 键 词：电芬顿 石墨极板 罗丹明B 三维荧光光谱 高效液相色谱质谱(HPLC-MS) 

分 类 号：X511[环境科学与工程—环境工程] O643[理学—物理化学]