摘要
由于光助Fenton反应产生大量.OH而使有机物得以氧化降解,杂多酸具有强的紫外光吸收特性,可以作为Fenton反应的活化剂.研究以结晶紫为底物,考察了UV/Fenton/杂多酸体系对染料的降解作用,考察了pH值、H2O2的用量、Fe2+的用量、杂多酸的引入等因素的影响,确定了优化的实验条件:在结晶紫的浓度是20 mg.L-1时,加入2.4 g.L-130%的H2O2,0.02 g.L-1的Fe2+,0.024 g.L-1的磷钨酸,pH2.7时反应60m in后测得脱色率高达95%.研究结果表明:紫外光能有效地促进结晶紫的氧化脱色,引入杂多酸催化剂后,可增强Fenton试剂的反应活性,大大缩短反应时间.
Due to photo - Fenton reaction producing a large number of OH which oxidizes and degradates the organic matter. Heteropolyacid which has strong UV absorption properties can be used as the activation of Fenton reaction. With the crystal violet as the final object of study, the authors inspect the UV/Fenton/heteropolyacid system influencing the degradation of dye, research the option of the initial pH value, the consumption of H2O2, the amount of the Fe^2 ＋ and the introduction of miscellaneous acid catalyst and finally determine the optimally experimental conditions： When the concentration of the crystal violet is 20 mg · L^-1, adding 2.4 g · L^-1 H2O2 （30%）, Fe^2＋ （0.02 g · L^-1 ）, Phosphorus acid（0.024 g · L^-1 ,pH =2.7）, the decolorization is measured as high as 95% 60 minutes later. The results show that ultraviolet light can effectively contribute to the decolorization of the crystal violet, enhance the activity of Fenton＇ s reagent, and greatly shorten the time of reaction after the introduction of heteropolyacid catalyst.
出处
《平顶山学院学报》
2009年第2期91-94,共4页
Journal of Pingdingshan University
