Optimization of Ultrasonic De colorization of Direct Dark Brown MM by Response Surface Methodology
ZHENG Huai li,ZHANG Hui qin,HE Qiang,ZHU Guo cheng,LIU Lan and FANG Hui li
DOI:10.11835/j.issn.1674-4764.2010.05.013
Received April 08, 2010,Revised , Accepted , Available online July 01, 2015
Volume ,2010,Pages 71-75
- Abstract
The effects of initial pH of direct dark brown MM dye solution, H2O2 concentration and dosage of Fe Ni Mn/Al2O3 on the degradation ratio of direct dark brown MM were studied by using low frequency ultrasound. By the Box Behnken centre united experiment design and response surface methodology, a predictive polynomial quadratic model was set up and the optimum extraction conditions were developed. The optimization is that pH of dye wastewater is 3.79, dosage of H2O2 is 1.74 mM, dosage of Fe Ni Mn/Al2O3 is 1.65 g on the initial dye concentration 100 mg/L. 91.09 % of direct dark brown MM was degraded under the optimal conditions. The experimental results are in good agreement with the predicted values of the model equation with 1.35 % deviation.