摘要
以微波无极紫外灯为光源,P25型Ti O2为催化剂,研究了微波反应器中茜素绿(AG)的光催化降解性能,考察了染料初始浓度及p H对降解效率的影响,利用ESI电子喷雾质谱和离子色谱测定了茜素绿降解的中间产物,并对产物的可生化性进行了分析。结果表明,微波/紫外/二氧化钛体系拓宽了染料浓度和p H的适用范围。降解后生成了大量小分子物质,可生化性得到了大幅度的提高,BOD5/COD值从反应前的0.0959增加到了0.40。
The photocatalytic degradation of alizarin green( AG) was investigated in aqueous Ti O2 suspensions under UV-Vis irradiation by a microwave discharged electrodeless lamp( MDEL). The effect of dye concentration and initial solution p H on the rate of AG degradation was studied. The intermediate products were analyzed by electrospray ionization mass spectrometry and ionic chromatography. It was found that MW / UV / Ti O2 system showed a strong softening effect on the parameters and the reactions can be carried out over a wide range of conditions. Large amount of small mole weight products was formed during the reaction. Moreover,the catalytic system could significantly improve the biodegradability of the dye. The BOD5/ COD ratio markedly increased from 0. 0959 to 0. 40.
出处
《环境工程学报》
CAS
CSCD
北大核心
2014年第12期5185-5190,共6页
Chinese Journal of Environmental Engineering
基金
国家自然科学基金资助项目(50978208)
关键词
微波无极紫外灯
光催化
茜素绿
降解
microwave discharged electrodeless lamp
photocatalysis
alizarin green
degradation
