نوع مقاله : مقالات پژوهشی
نویسندگان
1 مرکز تحقیقات بهداشت محیط، دانشکده بهداشت و تغذیه، دانشگاه علوم پزشکی لرستان، خرم آباد، ایران.
2 گروه ﻣﻬﻨﺪﺳﻰ ﺑﻬﺪﺍﺷﺖ ﻣﺤﻴﻂ، ﺩﺍﻧﺸﻜﺪﻩ ﺑﻬﺪﺍﺷﺖ بم، ﺩﺍﻧﺸﮕﺎﻩ ﻋﻠﻮﻡ ﭘﺰﺷﻜﻰ بم، بم، ﺍﻳﺮﺍﻥ.
3 گروه ﻣﻬﻨﺪﺳﻰ ﺑﻬﺪﺍﺷﺖ ﻣﺤﻴﻂ، ﺩﺍﻧﺸﻜﺪﻩ ﺑﻬﺪﺍﺷﺖ مشهد، ﺩﺍﻧﺸﮕﺎﻩ ﻋﻠﻮﻡ ﭘﺰﺷﻜﻰ مشهد، مشهد، ﺍﻳﺮﺍﻥ.
چکیده
سابقه و هدف: نیتروآنیلین یکی از مشتقات آنیلین با درجه سمیت بالا، خاصیت سرطان زایی بالقوه و اثرات جهش زایی است. یکی از تکنولوژی های موثر در حذف این ترکیبات از محلولهای آبی استفاده از فرایندهای اکسیداسیون پیشرفته ( AOP) است. این مطالعه با هدف بررسی کارایی فرایند پرسولفات فعال شده در حذف نیتروآنیلین از محلولهای آبی تحت شرایط آزمایشگاهی انجام شد.
مواد و روش ها: جهت انجام این مطالعه، تاثیر متغیرهای مورد مطالعه شامل pH (3 تا 11) زمان تماس (15 تا 120 دقیقه)، غلظت نیتروآنیلین (1 تا 30 میلی گرم در لیتر) و غلظت پرسولفات (100 تا 800 میلی گرم در لیتر) بر روی نمونه های سنتتیک بررسی شد. بعد از انجام فرایند، غلظت باقیمانده نیتروآنیلین با دستگاه اسپکتوفوتومتر -visUV در طول موج 530 نانومتر قرائت گردید. جهت تجزیه و تحلیل داده های بدست آمده، از آنالیز Independent-t و آمار توصیفی شامل میانگین و انحراف معیار استفاده شد.
یافته ها: بیشترین راندمان حذف نیتروآنیلین توسط فرایند پرسولفات فعال شده با نورپالسی تحت شرایط بهینه بدست آمده از آزمایشات شامل زمان تماس تعادلی 90 دقیقه، pH 8، غلظت پرسولفات فعال شده 600 ملیگرم در لیتر و غلظت نیتروآنیلین 1 میلی گرم در لیتر، 98/2درصد بدست آمد. نتایج نشان داد که فرایند فتوکاتالیستی پرسولفات فعال شده با نور پالسی از مدل سینتیک درجه دوم پیروی می نماید.
نتیجه گیری: بر اساس نتایج بدست آمده از این مطالعه فرایند پرسولفات فعال شده با نور پالسی تاثیر بالایی در حذف نیتروآنیلین از محلول های آبی داشت. لذا بدلیل راندمان بالای حذف، مقرون به صرفه بودن و راهبری ساده، استفاده از این فرایند در حذف آلاینده های آلی و مقاوم از محلولهای آبی توصیه می گردد.
کلیدواژه‌ها
عنوان مقاله [English]
Evaluating the efficiency of photo catalytic process of persulfate activated with pulsed light in removing nitroaniline from aqueous solutions
نویسندگان [English]
- Ali Toolabi 1
- Fateme Hassanabadi 1
- Elham Ahmadi Beldachi 2
- Nasrin Rezaizad 1
- Ziaeddin Bonyadi 3
1 Environmental Health Research Center, School of Health and Nutrition, Lorestan University of Medical Sciences, Khorramabad, Iran.
2 Department of Environmental Health Engineering, School of Health, Bam University of Medical Sciences, Bam, Iran.
3 Department of Environmental Health Engineering, School of Health, Mashhad University of Medical Sciences, Mashhad, Iran
چکیده [English]
Background and Purpose: Nitroaniline is a derivative of aniline known for its high toxicity, potential carcinogenicity, and mutagenic effects. A practical method for removing these compounds from aqueous solutions is applying advanced oxidation processes (AOPs). This study aims to investigate the efficiency of the activated persulfate process in removing nitroaniline from aqueous solutions under controlled laboratory conditions.
Materials and Methods: To conduct this study, the impact of various variables, including pH levels (ranging from 3 to 11), contact time (15 to 120 minutes), nitroaniline concentration (ranging from 1 to 30 mg/L), and persulfate concentration (ranging from 100 to 800 mg/L), on synthetic samples was examined. Post-treatment, the remaining nitroaniline concentration was measured using a UV-vis spectrophotometer at 530 nm. Independent t-tests and descriptive statistics, including mean and standard deviation, were employed to analyze the acquired data.
Results: The activated persulfate process with pulsed light achieved the highest nitroaniline removal efficiency at 98.2%. This result was obtained under specific conditions: a contact time of 90 minutes, a pH level of 8, an activated persulfate concentration of 600 mg/L, and a nitroaniline concentration of 1 mg/L. Our findings indicate that the photocatalytic process of persulfate activated by pulsed light adheres to the second-order kinetic model.
Conclusion: Based on the outcomes of this study, the persulfate process activated by pulsed light displayed significant effectiveness in removing nitroaniline from aqueous solutions. Therefore, owing to its high removal efficiency, cost-effectiveness, and straightforward management, it is recommended to employ this process to remove organic and resistant pollutants from aqueous solutions.
کلیدواژه‌ها [English]
- Activated persulfate
- Pulsed light
- Nitroaniline
- Photocatalyst
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