نوع مقاله : مقالات پژوهشی
نویسندگان
1 کارشناسی ارشد، گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی همدان، همدان، ایران.
2 استاد، گروه مهندسی بهداشت محیط، دانشکده بهداشت، مرکز تحقیقات علوم بهداشتی، دانشگاه علوم پزشکی همدان، همدان، ایران.
3 دانشجوی کارشناسی، گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی همدان، همدان، ایران.
چکیده
زمینه و هدف: فاضلاب‌‌های حاوی مواد رنگی به‌دلیل ویژگی‌هایی مانند دیر تجزیه‌پذیر و سمی‌بودن، چنانچه بدون تصفیه به محیط وارد شوند خسارات جبران‌ناپذیری به محیط زیست وارد می‌کنند. لذا، این مطالعه با هدف بررسی کارایی فناوری ازن‌زنی کاتالیزوری با استفاده از کلسیم‌پراکساید و تیتانیم‌دی‌اکسید در حذف رنگ اسید قهوه‌ای 14از محلولهای آبی انجام گرفت.
مواد و روش ها: مطالعه‌ی حاضر در مقیاس آزمایشگاهی و با استفاده از یک راکتور ازن‌زنی به‌صورت ناپیوسته انجام گرفت. تاثیر دوز کاتالیست، غلظت اولیه رنگ، pH اولیه و زمان تماس در راندمان ازن‌زنی کاتالیستی مورد بررسی قرار گرفت. جهت بررسی میزان تجزیه‌پذیری رنگ از آنالیز COD استفاده شد. تغییرات شدت رنگ توسط دستگاه اسپکتروفتومتر در طول موج 461 نانومتر قرائت گردید.
یافته‌ها: مطابق با نتایج حاصل از آنالیز داده‌ها، شرایط بهینه حذف رنگ اسید قهوه‌ای 14در زمان تماس 60 دقیقه، pH برابر با 9، غلظت اولیه آلاینده 50 میلی‌گرم بر لیتر و دوز کاتالیزور برابر با 4/0 گرم بر لیتر به‌دست آمد. در شرایط مذکور راندمان حذف رنگ 25/97 درصد گزارش شد. هم‌چنین راندمان حذف COD در طی زمان 60 دقیقه و تحت شرایط بهینه به 9/58 درصد رسید.
نتیجه‌گیری: نتایج حاصل از این مطالعه نشان داد کلسیم‌پراکساید و تیتانیم‌دی‌اکسید با پتانسیل کاتالیستی بالایی می‌توانند به‌عنوان یک گزینه پیشنهادی جهت حذف رنگ از پساب فاضلاب نساجی در فرآیند ازن‌زنی کاتالیزوری مورد استفاده قرار گیرند.
کلیدواژه‌ها
عنوان مقاله [English]
Investigation of Acid Brown 14 Removal from Aqueous Solutions Using a Catalytic Ozonation Process with CaO₂/TiO₂
نویسندگان [English]
- Fatemeh Sahraei 1
- Abdolmotaleb Seydmohammadi 2
- Fatemeh Bayat 3
- Shilan Hoseini 3
1 MSc ,, Department of Environmental Health Engineering, School of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran
2 Professor, Department of Environmental Health Engineering, School of Public Health, Research Center for Health Sciences, Hamadan University of Medical Sciences, Hamadan, Iran
3 3. BSc, Department of Environmental Health Engineering, School of Public Health, Hamadan University of Medical Sciences, Hamadan, Iran.
چکیده [English]
Background and Purpose: Untreated dye-containing wastewater poses severe environmental hazards due to the persistence, toxicity, and resistance to biodegradation of dyes. This study aimed to evaluate the efficiency of catalytic ozonation using calcium peroxide (CaO₂) and titanium dioxide (TiO₂) to remove Acid Brown 14 from aqueous solutions.
Materials and Methods: Laboratory-scale experiments were performed using a batch ozonation reactor. The influence of catalyst dosage, initial dye concentration, pH, and contact time on removal efficiency was assessed. Chemical oxygen demand (COD) was measured to evaluate dye degradation. Dye concentration was determined spectrophotometrically at 461 nm.
Results: Optimal removal of Acid Brown 14 was achieved at pH 9, a contact time of 60 minutes, an initial dye concentration of 50 mg/L, and a catalyst dose of 0.4 g/L, resulting in a decolorization efficiency of 97.25%. Under these conditions, COD removal efficiency reached 58.9% after 60 minutes.
Conclusion: The findings confirm that CaO₂ and TiO₂ exhibit high catalytic activity in the ozonation process and represent promising agents for decolorising textile wastewater.
Open Access Policy: This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. To view a copy of this licence, visit https://creativecommons.org/licenses/by/4.0/
کلیدواژه‌ها [English]
- Catalytic ozonation
- Acid Brown 14
- Calcium Peroxide
- Titanium Dioxide
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