بررسی کارایی فرایند الکتروفنتون در تجزیه رنگ‌های اسید بلک 1 و اسید بلو 113 در محیط‌های آبی

نوع مقاله : مقاله پژوهشی

نویسندگان

1 استاد گروه مهندسی بهداشت محیط، دانشکده بهداشت، مرکز تحقیقات علوم بهداشتی، دانشگاه علوم پزشکی همدان

2 دانش‌آموخته کارشناسی ارشد مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی همدان

چکیده

حضور حلقه‌های بنزن در ساختار رنگ‌های آزو، مشکلات عمده‌ای برای محیط زیست ایجاد می‌کند. در این مطالعه تجربی، قابلیت فرایند الکتروفنتون به‌عنوان یک فرایند اکسیداسیون پیشرفته الکتروشیمیایی، در تجزیه رنگ اسید بلک1 و اسید بلو 113 مورد مطالعه قرار گرفت. در این مطالعه، یک راکتور منقطع الکتروفنتون در مقیاس آزمایشگاهی مجهز به چهار الکترود و منبع برق DC به‌منظور حذف رنگ مورد استفاده قرار گرفت. تأثیر پارامترهای بهره‌برداری نظیر pH، ولتاژ، غلظت پراکسید هیدروژن، غلظت اولیه رنگ، جنس کاتد و زمان بهره‌برداری بررسی شد. نتایج نشان داد در این فرایند، pH اولیه محلول، غلظت اولیه پراکسید هیدروژن، ولتاژ کاربردی مختلف و زمان واکنش در میزان حذف رنگ بیشترین تأثیر را داشته است؛ به‌طوری که 98 درصد از هر دو رنگ بعد از 10 دقیقه در pH برابر 3، ولتاژ 20 ولت، غلظت پراکسید هیدروژن 100 میلی‌گرم در لیتر حذف شد. با افزایش pH از 3 به 11 و ولتاژ از 20 به 40 کارایی حذف به‌شدت کاهش یافت. حضور پراکسید هیدروژن شرط لازم برای این فرایند بود، به‌طوری که در غلظت برابر صفر حداکثر کارایی حذف 7 درصد برای هر دو رنگ مشاهده شد. نتایج حاصل از این مطالعه نشان داد، روش الکتروفنتون، می‌تواند یک فرایند جایگزین برای فرایندهای متداول باشد.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Investigation of the Performance of Electro-Fenton Process in the Degradation of Acid Black 1 and Acid Blue 113 in Aquatic Environment

نویسندگان [English]

  • Ali Reza Rahmani 1
  • amir shabanlo 2
  • Jamal Mehr Ali Pour 2
  • Azam Mobarakian 2
1 Prof. of Environmantal Health Engineering, Faculty of Public Health, Health Sciences Research Center, Hamadan University of Medical Sciences, Hamadan
2 Former Graduate Student of Environmental Health Engineering, Faculty of Public Health, Hamadan University of Medical Sciences, Hamadan
چکیده [English]

Azo dyes are a major environmental concern due to the presence of benzene rings in their structure. The present experimental study investigates the capability of the Electro-Fenton process as an Electrochemical advanced Oxidation Process for degrading Acid Black 1 and Acid Blue 113 in an aquatic environment. In this study, a lab-scale EF batch reactor equipped with four electrodes and a DC power supply was used for removing the dye. The effects of such operating parameters as pH, voltage, H2O2, initial dye concentration, cathode materials, and operation time were evaluated. The results showed that initial pH of the solution, initial H2O2 concentration, as well as different applied voltages and reaction times were highly effective in the dye removal efficiency of the process so that the 98% of both dyes were removed after 10 min of reaction at pH=3.0, a voltage of 20 V, and a H2O2 concentration of 100 mg/L. Removal efficiency decreased dramatically when pH was increased from 3 to 11, and voltage from 20 to 40 V. The presence of H2O2 was found to be the prerequisite to this process since the maximum dye removal obtained at an H2O2 concentration of zero was 7% for both dyes. The results of this study indicate that the Electro-Fenton method can be considered as an alternative process for the traditional treatment processes used.

کلیدواژه‌ها [English]

  • Electro-fenton
  • Electrode
  • Acid Black 1
  • Acid Blue 113

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مجله آب و فاضلاب
دوره 26، شماره 5 - شماره پیاپی 5
پیاپی: 99
آذر 1394
صفحه 75-83

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