مطالعه فعالیت فوتوکاتالیزوری نانوذرات اکسید روی به‌دست آمده از پسماند لیچینگ کارخانه ذوب روی برای حذف رنگ NB21 در نور فرابنفش

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد، گروه مهندسی معدن، واحد یزد، دانشگاه آزاد اسلامی، یزد، ایران

2 دانشیار، گروه مهندسی مواد و متالورژی، واحد یزد، دانشگاه آزاد اسلامی، یزد، ایران

3 دانشجوی دکترا، گروه مهندسی معدن، واحد بافق، دانشگاه آزاد اسلامی، بافق، ایران

10.22093/wwj.2020.187540.2875

چکیده

صنایع نساجی و رنگرزی یکی از صنایع مهم و پایه در هر کشوری است. رنگ‌های راکتیو محلول در آب به‌دلیل درخشندگی زیاد، مصرف انرژی کم و روش‌های کاربردی ساده، یکی از مهم‌ترین گروه رنگ‌های مورد استفاده در فرایند رنگرزی در صنعت نساجی هستند. پساب حاوی رنگ‌هایی مانند NB21 برای اکوسیستم و سلامت عمومی خطرناک است و لازم است قبل از ورود پساب به اکوسیستم، رنگ‌های موجود در آن با روشی حذف شوند. فرایند فتوکاتالیستی یکی از فرایندهای اکسیداسیون پیشرفته است که توانایی آن برای حذف انواع ترکیبات سمّی و سخت تجزیه‌پذیر اثبات شده است. در این پژوهش نانوذرات اکسید روی از محلول خالص‌سازی شده حاصل از پسماند کارخانه ذوب روی بافق به‌دست آمد. نانوذره به‌دست آمده توسط دستگاه‌های مختلفی بررسی و آنالیز شد. تشکیل، خلوص و خواص نوری نانوذرات اکسید روی توسط طیف‌سنج مادون قرمز بررسی شد. در نهایت این نانوساختارها به‌منظور بررسی خواص فتوکاتالیستی آنها، حذف رنگ راکتیو NB21 و بررسی سه پارامتر غلظت رنگ، pH و میزان نانوذره بر رنگ‌بری آن، تحت پرتو UV، به‌کار برده شدند. نتایج الگوهای پراش پرتو ایکس، نشان‌دهنده ساختار ورتزیت و شش وجهی نمونه و بلوری بودن آن بود. با توجه به تصاویر میکروسکوپ الکترونی عبوری، نمونه دارای شکل‌های واضح کروی و ابعاد شش گوش کاملاً مشخصی در محدوده بین 40 تا 120 نانومتر بود. در شرایط بهینه شامل 15 میلی‌لیتر رنگ با غلظت 1912/0 گرم در لیتر، pH برابر 5 و میزان نانو ذره 06/0 گرم طی مدت زمان 120 دقیقه اعمال فرایند رنگ‌بری تحت پرتو UV، 94 درصد از رنگ تخریب شد.

کلیدواژه‌ها


عنوان مقاله [English]

Study of Photocatalytic Activity of Zinc Oxide Nanoparticles Extracted from Leaching Residue of Zinc Melting Factory to Remove NB21 dye in UV light

نویسندگان [English]

  • Samaneh Sadat Gojarati 1
  • Mahmoud Hajisafari 2
  • Mohammad Mehdi Khosravirad 3
1 MSc., Dept. of Mining Engineering, Yazd Branch, Islamic Azad University, Yazd, Iran
2 Department of Metallurgical and Materials Engineering, Yazd Branch, Ialamic Azad University, Yazd, Iran
3 PhD Student, Dept. of Mining Engineering, Bafgh Branch, Islamic Azad University, Bafgh, Iran
چکیده [English]

Textile and dyeing industries are important industries in every country. Reactive colors soluble in water due to high brightness, low energy consumption and simple application method is one of the most important group of colors used in the textile industries. Wastewater containing colors such as R198 is hazardous to the ecosystem and health, So we need a way to remove color from the wastewater. The photocatalytic process is one of the advanced oxidation processes, which has shown the capability for eliminating various toxic and degradable compounds. In this study, zinc oxide nanoparticles were obtained from the purified solution from the residue of Zinc melting factory in Bafgh. The nanoparticles obtained by various devices were studied and analyzed. The formation, purity and optical properties of Zinc Oxide nanoparticles were investigated by Fourier Transform Infrared Spectrometer (FTIR) test. Finally, in order to investigate the photocatalytic properties of the nanostructures, the removal of NB21 reactive color, which is one of the most applicable and important colors in the textile industry, and harmful to the environment. The three parameters of color concentration, pH and amount of nanoparticle on its dye under UV rays were studied. The results of X-Ray Diffraction pattern (XRD), represents the crystalline and hexagonal structure of the samples. According to the Transmitted Electron Microscope (TEM) images, the sample has clear spherical shapes and distinct hexagonal dimensions in the range of 40-120 nm. Under optimum conditions, the 15 ml of color solution with concentration 0.1912 g/L, pH=5 and the amount of nanoparticle was 0.06 gram at time interval of 120 minute with application of bleaching process under UV rays, 94% of the color was degraded.

کلیدواژه‌ها [English]

  • Zinc oxide nanoparticles
  • photocatalytic properties
  • Reactive Color
  • UV Rays
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