Abstract：To study the influence of high-voltage pulse discharge on wastewater treatment, reactive black 5 （KN - B） azo dye was used as wastewater treatment target, and the pulse voltage （ U）, electrode distance （L）, air flow （Q）, the initial mass concentration （p） and initial pH were selected as the test parameters. These factors and their first-order interaction effect degree were investigated by partial factors design, and three significant factors including pulse voltage, initial pH value and air flow were filtered out. The significant factors were optimized through the orthogonal test design with three factors and three levels of tests. The experimental results show the optimal conditions are U = 1 200 V, Q = 300 mL / min, and pH =3.1 ; its forecast decolorization ratio is 89.68% and the relative error is 1.10%. In addition, the ultraviolet spectrum and GC/MS analysis indicate that dye molecules are formed by the conjugation system of the benzene ring, azo, and naphthalene ring, benzene ring and naphthalene are both opened, and at the same time the new intermediate products are generated.
2009, Vol. 30 
