بررسي كاهش سه نوع رنگ پساب نساجي بوسيله سيستم هاي شيميايي ، تشعشع UV و تركيبي

Study of the Reduction of three types of Textile waste water through Chemical , UV Radiation and mixed systems

Color deletion is still one of the main environmental problems in industrial waste water treatment and most methods used so far have not been very effective. This study was conducted to evaluate the effects of H202 , UV radiation and a . mixed system on color deletion from laboratory solutions and industrial waste water . In the UV system the solutions were exposed to UV radiation for different periods of time. In the Chemlical system , 25 mg/1 H2O2 was added to the solutions . In the mixed System , the solutions were added Various amounts of H2O2 and sewt to UV exposure unit . The findings revealed that blue and red colors reduced to less than 300 ADMI after 7 and 10 minutes UV exposure, respectively ; while , green color had a higher resistance. The results indicated that the mixed system rendered the maximum reduction for the three colors in that adding 5 , 12.5 and 25 mgll H2O2 in to the solutions exposed to UV radiation brought about faster color reduction. Color deletion up to 300 ADMI without H202 addition needed a time span of over 10 minutes. One of the advantages of the mixed method is its speed in waste water treatment.