بررسی حذف تتراسایکلین از پساب با استفاده از فناوری هیبریدی پلاسمای فیلم ریزان– زئولیت همنهشتی با نسبت Na2O/SiO2 متفاوت

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشجوی دکتری مهندسی شیمی، دانشگاه صنعتی سهند

2 دانشیار مهندسی شیمی، دانشگاه صنعتی سهند

چکیده

در این تحقیق از راکتور هیبریدی پلاسمای فیلم ریزان نوع تخلیۀ مانع دیالکتریک، به‌همراه زئولیت همنهشتی برای حذف آلایندۀ دارویی تتراسایکلین از پسابها استفاده شده است. سه نوع زئولیت
بر اساس نسبت دی
اکسید سدیم به دیاکسید سیلیکات 1، 2 و 3 با روش هیدروترمال، همنهشت شده است. تجزیه‌های طیفسنجی مادون قرمز (FT-IR)، پراش پرتو ایکس (XRD) میکروسکوپ الکترونی (SEM)، تجزیۀ‌ اندازهگیری سطح ویژه و طیف‌سنجی پراش انرژی پرتو ایکس (EDX) بر روی این زئولیتهای همنهشتی انجام گرفته است. میزان حذف تتراسایکیلین از پساب در زمان
60 دقیقه در راکتور هیبریدی طراحی شده، برای زئولیت همنهشتی با نسبت اکسید دی سدیم به دی
اکسید سیلیکات 1، حدود 81 درصد بوده است. مشخص شد که این میزان حذف آلاینده، 55 درصد بیشتر از سامانۀ پلاسمای بدون زئولیت است. میزان درصد حذف COD بر اساس تست‌های انجام‌شده حدود 71 درصد بوده است. بر اساس نتایج مربوط به آزمایشهای اثر گونههای فعال در حذف تتراسایکلین اثر رادیکال هیدروکسیل از رادیکال سوپر اکسید 12 درصد بیشتر بوده است. سازوکار پیشنهادی برای انجام واکنش اکسایش پیشرفته در حذف تتراسایکلین بحث و بررسی شده است.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Investigation about Tetracycline Removal from Aqueaus Solution by Hybrid Technology Plasma Water Falling Film-Synthesized Zeolite with Different Na2O/SiO2 Ratio

نویسندگان [English]

  • L. Feyzi 1
  • N. Rahemi 2
  • S. Allahyari 2
1 Ph. D. Student of Chemical Engineering, Sahand University of Technology
2 Associate Professor of Chemical Engineering, Sahand University of Technology
چکیده [English]

In this research, a hybrid water falling film plasma reactor dielectric barrier discharge with synthesized zeolite has been used to remove the tetracycline from aqueaus solution. Three types of zeolites have been synthesized by the hydrothermal method based on the ratio of sodium dioxide to silicate dioxide 1, 2 and 3. Infrared spectroscopy (FT-IR),
X-ray diffraction (XRD), electron microscopy (SEM), specific surface area, X-ray energy diffraction (EDX), and dot-mapping have been performed on these synthesized zeolites. The tetracycline removal efficiency was about 81% at 60 min in a hybrid reactor designed for synthesized zeolite with a ratio of sodium oxide to silica 1. It was found that this removal percentage is 55% higher than the only plasma system. The percentage of COD removal in hybrid system was about 71% based on the tests performed. Based on experiments related to the effect of active species in the tetracycline removal as a radical trapping experiment, the hydroxyl radical was 12% effective than the superoxide radical. The proposed mechanism is discussed for performing
an advanced oxidation reaction to remove tetracycline.

کلیدواژه‌ها [English]

  • Plasma
  • Falling Film
  • Zeolites
  • Tetracycline
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