Study on Degradation of Crystal Violet by UV/Fenton/Heteropolyacid System
The degradation of an azo dye crystal violet by UV/Fenton oxidation process in the presence of heteropolyacid solution has been investigated. The degradation rate is strongly dependent on the pH, initial concentrations of the dye, Fe2+, H2O2 and phosphotungstic acid. The effect of these parameters has been studied and the optimal reacting conditions were experimentally determined. It was found to be initial pH 2.7, H2O2=71 mM, Fe2+=0.5 mM, dye0=20 mg/L, phosphotungstic acid concentration is 24 mg/L. Under optimal conditions, 95％ degradation efficiency of dye in the presence of heteropolyacid solution was achieved after 60 min of reaction. The experimental results showed that the UV/Fenton oxidation process was an effective process for the degradation of crystal violet at low H2O2 and Fe2+ concentrations. Meanwhile, this research also proved that heteropolyacid could improve the photocatalytic efficiency in the UV/Fenton reaction as an efficient activator.
crystal violet UV/Fenton degradation hydrozyl radical
Songtian Li Mei Gao Yong Tao
School of Chemistry and Chemical Engineering Pingdingshan University Pingdingshan,China School of Chemistry and Chemical Engineering Southwest University Chongqing,China College of Physical Science and Technology Sichuan University Chengdu,China
国际会议
北京
英文
1-4
2009-06-11（万方平台首次上网日期，不代表论文的发表时间）