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.
出处
《浙江大学学报(工学版)》
EI
CAS
CSCD
北大核心
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)
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)
Electro-Fenton
graphite plate electrode
RhB solution
three-dimensional fluorescence
high performance liquid chromatography-mass spectrometry(HPLC-MS)