Removal of acid green 20 from wastewater of textile industries by photo-fenton process

Acid dyes are synthetic organic compounds with complicated chemical structures which their treatment are difficult and costly. Discharging of these dyes into the environment cause harmful effects on ecosystem and water quality. Factors which influence on removal including: pH, concentrations of H2O2 and Fe2+ ,light intensity of UV, the initial concentration of acid green 20 dye and contact time were investigated. Examinations under optimum removal conditions on real textile wastewater which its quality were predetermined also carried out. Optimum removal conditions were pH = 0.2, H2O2= 0.2 mmol, Fe2+=40 mg/L, UV=30 watt, the initial concentration of acid green 20 dye= 25 mg/L and time= 10 minutes. Maximum removal values were 94.62 and 73 percent for synthetic solutions and real wastewater respectively. Photo-Fenton process is cheap and effective way in removal of acid dyes and able to remove these dyes from wastewater with high efficiency.