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Register a new userDecolourization of Textile Industry Wastewater by the Photocatalytic degradation process. «Part 2»
نزع الأصبغة من مخلفات المياه الصناعية لمصانع النسيج بتقانة التحطيم الحفزي الضوئي «الجزء الثاني»
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اهتم الباحثون خلال السنوات القليلة الماضية بالعمليات التكنولوجية الكيميائيـة المـستخدمة لنـزع الأصبغة من مخلفات المياه الصناعية لمصانع النسيج، و على هذا النحو درسنا التحطيم المحفـز ضـوئياً لمختلف الأصبغة الآتية: Methyl orange, Azo carmine B, Coomassie Brilliant blue G250, Tartrazine, Calcon, Eriochrome blue SE, Solamine Red 4BL, Bismarck brown Y(G), Methylen blue, Black 5, Red 120, Morin. و ذلك باستعمال ثنائي أكسيد التيتانيوم (P25 Degussa (TiO2 حفازاً، حيث خضعت كل محاليـل الأصبغة المستخدمة لنزع اللون. درسنا حركية التفاعل و وجدنا أنه من المرتبة صفر أو واحد و ذلك بالنسبة لتركيز الصباغ المدروس. و قارنا هذه النتائج مع الخواص الامتزازية، و درسنا أيضا تأثير إضافة الكاشف (الماء الأكـسجيني) فـي التفاعل، و لاحظنا بوضوح ازدياد معدل سرعة التفاعل في كل الحالات كما وجدنا أيضا عدم تغيـر مرتبـة التفاعل بالنسبة لتركيز الصباغ في وجود الكاشف المضاف. من الصعب جداً إعطاء صورة عامـة عـن الحركية باستخدام هذه الأصبغة المختلفة، و لكن وجدنا هذه العملية فعالة في نزع الأصبغة مـن مخلفـات المياه الصناعية لمصانع النسيج.
During the past few years attention has been drawn on chemical techniques that could be used to discolour textile wastewaters. We have studied the photocatalytic degradation of various dyes (Methyl orange, Azo carmine B, Coomassie Brilliant blue G250, Tartrazine, Calcon, Eriochrome blue SE, Solamine Red 4BL, Bismarck brown Y(G), Methylen blue, Black 5, Red 120, Morin) using TiO2 P25 Degussa as catalyst. All dye solutions underwent a decolourization. The kinetics of reaction have been studied and were found to be zero or first order with respect to the dye. It was compared with the adsorption properties. The effect of the addition of hydrogen peroxide has been studied. An enhancement of the rate has been observed in all cases and the order with respect to the dye's concentration in presence of the additive seemed not to change. It is difficult to give general view of the kinetics using these very different dyes but the process was found to be effective for the decolourization of textile wastewater.
References used
Graup. Textile industry wastewaters treatment. Wat scitehnol 1991; 24; 97
Galindo C, Jacques P, Kalt A. Photodegradation of the amino azo benzene acid orange 52 by three advanced oxidation processes. J. photochem. And photobiology A: Chemistry 130 (2000) 35-47
Akmehmet Balcioglu I, Arslan I. Treatment of textile industry wastewater by enhanced photocatalytic oxidation reaction. J. Adv. Oxid Technol 1999;4; 189-95
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