摘要
采用Box-Behnken试验设计,响应面优化混凝-氧化耦合工艺处理草甘膦废水,考察了聚铁类絮凝剂(PPFS)投加量、双氧水(H_2O_2)投加量、pH和反应时间对氧化和混凝去除废水污染物的影响。结果表明,该耦合工艺可有效地去除草甘膦废水中的化学需氧量(COD)和总磷(TP)。在单因素试验基础上,经响应面优化后,在初始pH值分别为6.84、8.80,n(Fe)/n(H_2O_2)(摩尔比)分别为19.08×10^(-3)、19.51×10^(-3),反应时间分别为29.50、29.04 min时,草甘膦废水中COD和TP的去除率依次为75.52%、99.91%。经过回归分析,模型拟合性良好,校正试验偏差相应为1.73%、0.53%。
The methods of Box-Behnken design and response surface methodology （RSM） analysis were used for the pretreatment of glyphosate-producing wastewater. The effects of initial pH value, phosphorus ferric sulfate （PPFS） dosage, H2O2 dosage and reaction time on organics removal were investigated during the oxidation and coagulation processes. The results showed that COD and TP were degraded efficiently by PPFS/H2O2 coupled coagulation and oxidation under the optimum dosage based on single factor experiment. After response surface analysis, when initial pH value was 6.84, 8.80, n（ Fe）/n（ H2O2 ） was 19.08× 10-3, 19.51×10-3, reaction time was 29.50, 29.04 min, COD and TP removal rate for glyphosate-producing wastewater was 75.52%, 99.91% respectively. A regression analysis was utilized to evaluate the fitness of the model, which showed that the experimental values agreed with the predicted values of the model equation with 1.73%, 0.53% deviation, respectively.
出处
《净水技术》
CAS
2017年第8期46-51,共6页
Water Purification Technology
关键词
草甘膦生产废水
聚磷硫酸铁类絮凝剂(PPFS)
优化处理
响应面法
glyphosate-producing wastewater polymerit phosphate ferric sulfate （PPFS） optimized treatment response surfacemethod （RSM）
