The degradation process of Astrazon Pink FG was investigated in aqueous solution by glow discharge electrolysis (GDE) technique. The active species such as HO·

H· and O· were detected by emission spectrum of GDE. The decolorization rate

removal rate of total organic carbon (TOC)

solution pH

conductivity and intermediate products of the degradation solution at different discharge time were determined by ultraviolet spectrum

TOC analyzer

pH meter

conductivity meter and ion chromatography. The degradation mechanism of Astrazon Pink FG solutions was proposed according to various analysis results. The results showed that under the 600 V discharge voltage

highly active species such as HO·

O· and H· are produced. The decolorization rate and TOC removal rate of 200 ml 20 mg/L Astrazon Pink FG are up to 99.0% and 72.6% after treating 120 min. The solution pH is decreased and then increased. However

the conductivity of degradation solution is increased and then decreased. Ion chromatography test showed that the degradation process can produce a variety of small organic molecules

such as lactate

acetate

formate

malonate

malate

succinate and oxalate. Hydroxyl radical (HO·) plays a major role for the degradation of Astrazon Pink FG. It is found that under the HO·

the chemical bonds of Astrazon Pink FG is broken

and then hydroxylation of benzene ring is formed. After that

some of benzoquinone and lower molecular weight organic acids are produced. Finally

all of organic compounds are completely mineralized into Cl-

NO3-

CO2 and H2O.