摘要
通过试验方法优化,研究了芬顿体系中pH值、温度、H2O2投加量以及过氧化氢/硫酸亚铁摩尔比C(H2O2)/C(FeSO4)对活性艳红X-3B脱色及总有机碳(total organic carbon,TOC)去除率的影响。结果表明:初始pH值对脱色率和TOC去除率的影响均最大。在正交试验的基础上,通过单因素试验进一步优化了反应条件,得出芬顿法去除活性艳红X-3B的最佳反应条件为pH=3、H2O2投加量为2.5mmol.L-1、C(H2O2)/C(FeSO4)=10时,模拟废水的脱色率可达98.93%,TOC去除率可达48.81%。此外,芬顿体系的反应速率受温度的影响较大,色度去除符合二级动力学模型,根据Arrhenius公式计算得出活性艳红X-3B在芬顿体系中的反应活化能约为107kJ.mol-1。
Chemical oxidation by Fenton＇s reagent of a reactive azo dye （Brilliant Red X-3B） had been optimized using experimental design. The variables considered were pH, temperature as well as initial concentrations of hydrogen peroxide and ferrous ion. The results show that initial pH value has the biggest effect on TOC removal and decoloration. Based on orthogonal experiment design, single factor experiment was conducted to optimize reaction conditions. The results reveal that the optimum reaction conditions obtained are pH 3, hydrogen peroxide （30%） 2.5 retool. L-1, C（H202）/C（FeS04） ratio 10, and the rates of decoloration and TOC removal for simulated wastewater are 98.93% and 48.81%, respectively. Furthermore, the effect of temperature on the TOC removal rate is remarkable, and the decolorization rate follows second-order kinetic model. Using Arrhenius equation, the activation energy calculated for degradation of reactive Brilliant Red X-3B in Fenton reaction system is about 107 kJ ·mool-1 .
出处
《化工学报》
EI
CAS
CSCD
北大核心
2013年第3期1049-1054,共6页
CIESC Journal
基金
水体污染控制与治理科技重大专项(2012ZX07206-002-02
2009ZX07317-009)~~
关键词
芬顿法
偶氮染料
活性艳红X-3B
脱色
活化能
Fenton＇s reagent
azo dyes
reactive Brilliant Red X-3B
decoloration
activation energy
