响应曲面法分析零价铁对普施安蓝H-5R脱色的影响因素

Influence Factors of Procion Blue H-5R Decolorization by Zero-Valent Iron with Response Surface Methodology

该文分别从零价铁(ZVI)投加量、粒径、pH值、盐浓度、摇床摇速对偶氮染料普施安蓝H-5R进行脱色速率研究,并通过响应曲面进行试验优化。结果表明在初始染料溶液浓度为200 mg/L时,最适投加量为1.5 g/L,脱色速率随着粒径和摇床摇速增大而升高,中性和偏酸条件下pH影响不大,高浓度盐可以增加染料的脱色。响应曲面法(RSM)结果还表明不同影响因素之间存在相互作用,从而影响染料脱色。

In this study, zero-valent iron （ZVI） was used to decolorize an azo dye, procion blue H-5R. Effects of ZVI dosage, ZVI particle size, initial pH, salt concentration and shaking speed on decolorization rate were investigated with response surface methodol- ogy. The results indicate that when dye concentration is 200 mg/L and ZVI dosage is 1.5 g/L, decolorization efficiency increases with ZVI particle size and the shaking speed, pH has little effect in neutral or weak acidic environment, and high salt concentration can enhance removal efficiency of dye. The response surface methodology results also demonstrate that the different factors have interac- tive effects on decolorization.