تصفیه فاضلاب حاوی آلاینده سخت تجزیه پذیر از طریق فرایند اکسیداسیون پیشرفته ازن زنی

نوع مقاله : مقاله کامل پژوهشی

نویسندگان

1 دانشکده مهندسی عمران، دانشگاه صنعتی نوشیروانی بابل

2 دانشکده مهندسی علوم زمین، دانشگاه صنعتی اراک

چکیده

کلروفنل­ ها از آلاینده ­های آلی سخت تجزیه ­پذیر هستند که با طول عمر بالا و تجزیه ­پذیری کم، در محیط زیست، خطرات بسیاری برای جانداران به ­وجود می­ آورند. ازن ­زنی یکی از روش­ های اکسیداسیون پیشرفته می­ باشد که دارای قدرت بالایی برای حذف این نوع آلاینده ها است. در این پژوهش حذف 4-کلروفنل (4-Chlorophenol) با فرایند ازن­زنی بررسی شده ­است. با توجه به مدل فیزیکی فرایند، مدل ریاضی راندمان حذف آلاینده با استفاده از روش سطح پاسخ ارائه شده است. پارامترهای زمان، غلظت 4- کلروفنل، مقدار گاز ازن ورودی و pH به­ عنوان پارامترهای مستقل و راندمان حذف آلاینده به­ عنوان پارامتر وابسته در نظر گرفته شد. بدین ­ترتیب، اثر هر یک از متغیرهای مستقل و اثر هم ­زمان آن­ها بر متغیر وابسته و همچنین اثر متغیرهای مستقل بر یکدیگر نیز ارزیابی شده ­است. جهت انجام آزمایش­ ها از راکتور ناپیوسته استفاده گردید. با توجه به نتایج آزمایش ­ها، شرایط بهینه آزمایش در غلظت آلاینده برابر 35 میلی­گرم بر لیتر، pH برابر 11، مقدار گاز ازن 5 گرم بر ساعت و زمان 30 دقیقه به ­دست آمد که منجربه حذف 52/93% آلاینده شد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Treatment of Wastewater Containing Persistent Organic Pollutants Through the Advanced Oxidation Process (Ozonation)

نویسندگان [English]

  • Amir Masoud Yaseri 1
  • Farhad Qaderi 1
  • Behnoosh Khataei 2
1 Faculty of Civil Engineering, Babol Noshirvani University of Technology, Babol, Iran
2 Faculty of Earth Sciences Engineering, Arak University of Technology, Arak, Iran
چکیده [English]

By cities development, population increase and industries expansion, the importance of controlling organic and phenolic pollutants is increasing. Chlorophenols have a high absorption by river sediments and remain stable due to their long life. Different methods such as absorption by adsorbents, absorption in a solvent, ion exchange, membrane process, reverse osmosis and electrochemical process have been presented to remove phenolic compounds. Today, instead of the traditional and costly methods, advanced oxidation processes (AOPs) are used to treat toxic organic compounds (Sheikholeslami et al., 2020). Ozonation has a good effect on the oxidation of resistant pollutants due to its higher oxidation potential and formation of secondary oxidizers (Yang et al., 2020; Liang et al., 2021). Nowadays, the environmental effects of various industrial factors have been investigated many times through modeling (Babanezhad et al., 2017; Ebrahimi Ghadi et al., 2019; Ebrahimi and Qaderi, 2021).
Response surface methodology (RSM) is a set of mathematical and statistical techniques used for regression model and evaluation of parameters interactions, development and optimization of processes (Ashrafi et al., 2015; Miranzadeh et al., 2020). RSM is a powerful method to determine the influence of variables on the pollutant removal process and can reveal the factors by greater impact on the process (Fard et al., 2012). One of its main objectives is to determine the optimum conditions of the process (Mourabet et al., 2012). According to the review of other studies, in this research, the removal of 4-chlorophenol was investigated by the ozonation method and under laboratory conditions. For this purpose, after designing the experiment with the response surface methodology, the interactions of the determined independent variables, the optimum conditions and the proposed model were evaluated.

کلیدواژه‌ها [English]

  • Wastewater
  • Ozonation
  • Advanced oxidation
  • Persistent organic pollutants
  • Experiment design

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نشریه مهندسی عمران و محیط زیست دانشگاه تبریز
دوره 54، شماره 116 - شماره پیاپی 116
پاییز 1403
آذر 1403
صفحه 15-24

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