نوع مقاله : مقاله پژوهشی
نویسندگان
- سهراب گل‌محمدی 1
- عبدالعظیم علی‌نژاد 2
- افشین قادرپوری 3
- نظام میرزایی 4
- محمدحسین ساقی 2
- منصور قادرپوری 5
1 ارشناس ارشد و عضو کمیته تحقیقات دانشجویی، گروه مهندسی محیط زیست، شرکت آب‌وفاضلاب روستایی استان کردستان،سنندج، ایران.
2 دانشجوی دکتری، گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی شهید بهشتی، تهران، ایران.
3 دانشجوی کارشناسی ارشد، کمیته تحقیقات دانشجویی، گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی شهید بهشتی، تهران، ایران.
4 استادیار، مرکز تحقیقات بهداشت محیط، دانشگاه علوم پزشکی کردستان، سنندج، ایران.
5 استادیار، گروه مهندسی بهداشت محیط، دانشکده بهداشت و تغذیه، دانشگاه علوم پزشکی لرستان، خرم‌آباد، ایران.
چکیده
اهداف پساب‌های حاصل از صنایع نساجی به دلیل اینکه حاوی آلاینده‌های آلی رنگ‌زاها هستند، منبع عمده آلودگی محیط زیست از نظر طیف وسیع آلاینده‌ها و پیچیدگی ساختار هستند. هدف این پژوهش تعیین کارایی فرایند فتوکاتالیستی نور خورشید در حذف رنگ‌زای اسید بلاک یک از محیط آبی با استفاده از نانو ذرات اکسید روی سنتزشده است.
مواد و روش ها این تحقیق مطالعه‌ای نیمه‌تجربی و آزمایشگاهی است. ابتدا سنتز نانو ذرات در آزمایشگاه انجام و به منظور تعیین مشخصات آزمایش‌ها SEM و توزیع اندازه ذرات و XRD انجام شد. سپس pH بهینه تعیین گردید. در ادامه با نگه‌داشتن pH بهینه تأثیر غلظت پراکسید هیدروژن و غلظت نانوذره و غلظت‌های مختلف رنگ‌زا بررسی شدند.
یافته ها نتایج نشان داد کارایی حذف فرایند در 4=pH حداکثر و برابر 1/15درصد است. بهترین عملکرد حذف رنگ در غلظت 5 میلی‌گرم در لیتر به دست آمد. حداکثر و حداقل عملکرد حذف رنگ اسید بلاک یک به ترتیب در غلظت‌های 30 و 5 میلی‌مولار بر لیتر از پراکسید هیدروژن حاصل شد.
نتیجه گیری فرایند نانو فتوکاتالیستی روشی بسیار کارآمد برای حذف رنگ‌زا در محلول‌های آبی است. این روش مواد آلی را به موادی با میزان سم کمتر تبدیل می‌کند. همچنین انرژی استفاده‌شده در این فرایند نور خورشید است که به صورت طبیعی در دسترس است.
کلیدواژه‌ها
عنوان مقاله [English]
Photo Catalytic Efficiency of Hydrothermal Synthesized Zinc Oxide Nanoparticles for Removal of Acid Black 1 from Aqueous Solutions
نویسندگان [English]
- Sohrab Golmohammadi 1
- Abdol Azim Alinejad 2
- Afshin Ghaderpoury 3
- Nezam Mirzaei 4
- Mohammad Hossien Saghi 2
- Mansour Ghaderpoori 5
1 MSc. and Student research Committee, Department of Environmental engineering, Kurdistan rural water & wastewater company, Sanandaj, Iran.
2 PhD Candidate, Department of Environmental Health Engineering, School of Health, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
3 MSc. Student, Department of Environmental Health Engineering, School of Health, Shahid Beheshti University of Medical Science, Tehran, Iran.
4 Assistant Professor, Environmental Health Research Center, Kurdistan University of Medical Sciences, Sanandaj, Iran.
5 Assistant Professor, Department of Environmental Health Engineering, School of Health and Nutrition, Lorestan University of Medical Sciences, Khorramabad, Iran.
چکیده [English]
Background Wastewater from textile dyes, which contain organic pollutants, is a major source of environmental contamination. This study aimed to determine the efficiency of the photo-catalytic process of ZnO nanoparticles in removing Acid Black 1 from aqueous solutions.
Methods & Materials This study was quasi-experimental. The nanoparticles were synthesized in the laboratory. To determine their characteristics some tests, including SEM, XRD and particle size distribution were done. The optimum pH was determined in the test, then, by maintaining the optimum pH, hydrogen peroxide concentration, dye concentration and different concentrations of nanoparticles were studied.
Results The results showed that the removal efficiency of this process is maximum at pH=4 and equals to 1.15%. The best color removal efficiency was obtained at a concentration of 5 mg/l. The maximum and minimum removal efficiency as a color block acid were obtained at a concentration of 30 and 5 Mmol/mL of hydrogen peroxide, respectively.
Conclusion Nano-photo catalytic process is a highly efficient method for the removal of dyes in aqueous solutions. In this process, organic materials are converted into less toxic substances also the energy of sunlight, which is used in this process is normally available
کلیدواژه‌ها [English]
- Acid black 1
- photo catalyst
- Effluent
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