Degradation of Toluene in Treatment of Refinery Wastewater by Photocatalytic Oxidation Technology in a Bubble Column Reactor Using ZnO-TiO2 Composite Nanocatalyst and Packing Material

هدى حسان المقدادي; كرار اياد دعيبل

doi:10.52716/jprs.v16i1.1125

المؤلفون

هدى حسان المقدادي وزارة النفط، الشركة العامة لتعبئة وخدمات الغاز، فرع النجف
كرار اياد دعيبل وزارة النفط، شركة مصافي الوسط، مصفى النجف

DOI:

https://doi.org/10.52716/jprs.v16i1.1125

الكلمات المفتاحية:

Toluene removal; oxidation reaction; Bubble column reactor; ZnO–TiO₂ nanocatalyst; packing material; hydroxyl radicals.

الملخص

تُعد مفاعلات عمود الفقاعات المؤكسدة (BCRs) مفيدة في معالجة مياه الصرف الصحي نظرًا لقدرتها الفعالة على نقل الكتلة والخلط. ومع ذلك، نظرًا لانخفاض مستوى أكسدة الملوثات، فإن قدرة مفاعلات عمود الفقاعات المؤكسدة على إزالة التولوين محدودة. في هذه الدراسة، استخدمت مادة تعبئة ومحفز نانوي مركب من أوكسيد الزنك وأوكسيد التيتانيوم (ZnO-TiO₂) في مفاعل عمود الفقاعات المؤكسدة لتحسين تحلل التولوين. بالإضافة إلى ذلك، استُخدمت سرعة الغاز السطحية (0.4، 0.8، 1.2، 1.6، 2، 2.4، و2.8 سم/ثانية) لتقييم احتجاز الغاز، وانخفاض الضغط، وقطر الفقاعة. حُددت السرعة السطحية المثلى للغاز عند 2.4 سم/ثانية. باستخدام مواد تعبئة ومحفز نانوي مركب من أكسيد الزنك وأكسيد التيتانيوم في مفاعل BCR، تمت إزالة التولوين بالكامل (100%) عند تركيزات تولوين 10، 20، 30، و40 جزء في المليون، خلال فترات تفاعل 50، 60، 70، و80 دقيقة على التوالي. إضافةً إلى ذلك، أُضيفت جرعتان من المحفز النانوي المركب من أكسيد الزنك وأكسيد التيتانيوم (0.04 و0.12 جم/لتر) إلى خليط التفاعل؛ وحُددت الجرعة المثالية بـ 0.12 جم/لتر. لذلك، استُخدمت أربع طرق معالجة ( الهواء/ H₂O₂) فقط، ((الهواء +(H₂O₂/ حشوة) و(المحفز النانوي المركب ZnO-TiO₂+ (الهواء (H₂O₂/)، و(المحفز النانوي المركب ZnO-TiO₂ + (الهواء + (H₂O₂/+حشوة) لتقييم أربعة تراكيز من التولوين في BCR وهي (10، 20، 30، و40 جزء في المليون). وأخيرًا، أوضحت النتائج آلية التفاعل وفسرت الاكسدة في BCR، ويمكن استخدام عملية المعالجة المطبقة بفعالية لإزالة التولوين من مياه الصرف الصحي بتكلفة منخفضة، وباستهلاك منخفض للطاقة وبعملية بسيطة.

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