以C.I.Reactive Red 241、C.I.Disperse Blue 56模拟染料废水为对象,研究了电解法处理该类染料废水的优化条件。考察了起始电压、电解时间、溶液初始p H对处理效果的影响。结果表明,在p H=7,U=14V、I=3.2A、t=30min的条件下,C.I.Reactiv...以C.I.Reactive Red 241、C.I.Disperse Blue 56模拟染料废水为对象,研究了电解法处理该类染料废水的优化条件。考察了起始电压、电解时间、溶液初始p H对处理效果的影响。结果表明,在p H=7,U=14V、I=3.2A、t=30min的条件下,C.I.Reactive Red241模拟染料废水的脱色率可达到86%以上;在p H=7,U=14V、I=3.2A、t=25min的条件下,C.I.Disperse Blue 56模拟染料废水的脱色率可达到79以上%。展开更多
Textile wastewater shows great threats to the environment if not well pretreated before discharge. A promising technique, ozonation, was applied to remove the color in dye solutions containing C.I. Reactive Red 195 （...Textile wastewater shows great threats to the environment if not well pretreated before discharge. A promising technique, ozonation, was applied to remove the color in dye solutions containing C.I. Reactive Red 195 （RR195） in a semi-batch reactor. The decolorization of RRI95 by the ozone process followed pseudo-first-order kinetics. Several factors which influenced the efficiency of decolorization were studied and the reaction rate constant （k） obtained with different operational parameters was compared. Our results showed that RRI95 was more easily degraded in acidic than in alkaline conditions. The dyeing auxiliaries （sodium carbonate and sodium chloride） that acted as radical scavengers could enhance the decolorization process, and the ozonation time for total color removal lengthened if the initial dye concentration was higher. The analysis of the ozonation products was performed by liquid chromatography-tandem mass spectrometer and a possible degradation pathway was predicted according to the ozonation products and structure of RR195. Our results indicated that ozonation was effective in the color removal of dyes, but further treatment might be necessary since the ozonation products are high toxic.展开更多
文摘以C.I.Reactive Red 241、C.I.Disperse Blue 56模拟染料废水为对象,研究了电解法处理该类染料废水的优化条件。考察了起始电压、电解时间、溶液初始p H对处理效果的影响。结果表明,在p H=7,U=14V、I=3.2A、t=30min的条件下,C.I.Reactive Red241模拟染料废水的脱色率可达到86%以上;在p H=7,U=14V、I=3.2A、t=25min的条件下,C.I.Disperse Blue 56模拟染料废水的脱色率可达到79以上%。
文摘Textile wastewater shows great threats to the environment if not well pretreated before discharge. A promising technique, ozonation, was applied to remove the color in dye solutions containing C.I. Reactive Red 195 （RR195） in a semi-batch reactor. The decolorization of RRI95 by the ozone process followed pseudo-first-order kinetics. Several factors which influenced the efficiency of decolorization were studied and the reaction rate constant （k） obtained with different operational parameters was compared. Our results showed that RRI95 was more easily degraded in acidic than in alkaline conditions. The dyeing auxiliaries （sodium carbonate and sodium chloride） that acted as radical scavengers could enhance the decolorization process, and the ozonation time for total color removal lengthened if the initial dye concentration was higher. The analysis of the ozonation products was performed by liquid chromatography-tandem mass spectrometer and a possible degradation pathway was predicted according to the ozonation products and structure of RR195. Our results indicated that ozonation was effective in the color removal of dyes, but further treatment might be necessary since the ozonation products are high toxic.
