1استاد،گروه مهندسی بهداشت محیط،دانشکده بهداشت و مرکز تحقیقات علوم بهداشتی، دانشگاه علوم پزشکی همدان،همدان،ایران
2دانشیار،گروه مهندسی بهداشت محیط، دانشکده بهداشت و مرکز تحقیقات علوم بهداشتی،دانشگاه علوم پزشکی همدان،همدان،ایران
3دانشجوی دکترای تخصصی مهندسی بهداشت محیط، گروه مهندسی بهداشت محیط؛ دانشکده بهداشت؛ عضو شورای مرکزی کمیته تحقیقات دانشجویی دانشگاه علوم پزشکی ایران، دانشکده بهداشت، دانشگاه علوم پزشکی ایران ؛ تهران؛ ایران.
4کارشناس ارشد مهندسی بهداشت محیط،دانشگاه علوم پزشکی همدان،همدان،ایران.
5دانشجوی دکترای تخصصی مهندسی بهداشت محیط، گروه مهندسی بهداشت محیط،عضو مرکز پژوهش دانشجویان دانشگاه علوم پزشکی همدان،دانشکده بهداشت، دانشگاه علوم پزشکی همدان،همدان،ایران
6دانشجوی دکترای تخصصی مهندسی بهداشت محیط،گروه مهندسی بهداشت محیط، عضو مرکز پژوهش دانشجویان دانشگاه علوم پزشکی همدان،دانشکده بهداشت،دانشگاه علوم پزشکی همدان ،همدان،ایران
تاریخ دریافت: 13 خرداد 1397،
تاریخ بازنگری: 21 مرداد 1397،
تاریخ پذیرش: 25 تیر 1398
چکیده
زمینه و هدف:امروزه استفاده از فرآیندهای اکسیداسیون پیشرفته، به‌دلیل کارایی بالا در تخریب ترکیبات آلی مقاوم رو به گسترش است. استفاده توام از جریان الکتریکی با رادیکال های آزاد سولفات باعث ایجاد خاصیت تشدید کنندگی بر حذف آلاینده می‌شود. هدف از این مطالعه بررسی کارایی فرآیند پرسولفات فعال شده به روش الکتروشیمیایی با جفت الکترود های مس-آهن در حذف آنیلین از محیط های آبی بود. مواد و روش‌ها: در این مطالعه تجربی، از محفظه واکنش الکتروشیمایی به حجم مفید 250میلی لیتر مجهز به 2 الکترود از جنس مس و آهن با ابعاد mm 50×10×2، متصل به منبع تغذیه جریان مستقیم استفاده شد. همچنین تاثیر پارامترهای pH، میزان جریان الکتریکی، غلظت آنیون پرسولفات و غلظت اولیه آلاینده مورد بررسی قرار گرفت. اندازه گیری غلظت آنیلین با استفاده از اسپکتروفوتومتر مدل DR5000 ساخت HACH صورت گرفت. یافته‌ها: نتایج بدست آمده در این مطالعه نشان داد که حذف آنیلین تحت تأثیر پارامترهای مختلف بهره‌برداری است، به طوری که بیشترین کارایی فرآیند در pH برابر 4، ولتاژ برابر 11 ولت، غلظت آنیون پرسولفات برابر 750 mg/L و در غلظت 60 میلی گرم بر لیتر آلاینده، 14/90 درصد در مدت زمان 25 دقیقه بدست آمد. همچنین مشخص شد نیتروژن دهی کارایی فرآیند الکتروپرسولفات را افزایش و هوادهی کارایی را کاهش می دهد. نتیجه‌گیری: مطالعه حاضر، بیانگر کارایی مناسب فرآیند مذکور در حذف آلاینده‌های آلی در شرایط بهینه بهره‌برداری و همچنین به عنوان یک تکنولوژی جایگزین جهت تصفیه فاضلاب‌های صنعتی حاوی آنیلین می‌باشد.
1Professor, Department of Environmental Health Engineering, School of Public Health and research center for Health Sciences, Hamadan University of Medical Sciences, Hamadan, Iran
2Associate Professor, Department of Environmental Health Engineering, School of Public Health and research center for Health Sciences, Hamadan University of Medical Sciences, Hamadan, Iran
3Ph.D Student of Environmental Health Engineering, Iran Student Research Committee, Faculty of public health Branch, Iran University of medical sciences, Tehran, Iran.
4MSc Student in Environmental Health Engineering, Member of Student Research Committee, Faculty of Health, Hamadan University of Medical Sciences, Hamadan, Iran
5Ph.D Student of Environmental Health Engineering, Member of Student Research Committee, Faculty of public health, Hamadan University of Medical Sciences, Hamadan, Iran.
6Ph.D Student of Environmental Health Engineering, Member of Student Research Committee, Faculty of public health, Hamadan University of Medical Sciences, Hamadan, Iran.
چکیده [English]
Background: The use of (advanced oxidation processes) AOPs, due to have high performance in degradation of organic compounds is growing. Combined use of electrical current and sulfate free radical creates a synergy effect on removal of pollutant. The aim of this study was to evaluation the performance of activated per sulfate by the electrochemical method with copper – iron electrodes for removal of Aniline from aqueous solution. Materials and Methods: In this experimental study, a batch electrochemical reactor with a useful volume of 250 mL, copper and iron electrodes with 2×10×50 mm area from the DC source to aniline degradation was used. Also the Influence of parameters such as pH, Voltage (with amper), initial concentration of per sulfate and initial concentration of Aniline was investigated. Aniline concentrations, determined by spectrophotometer DR5000 making HACH. Results: The experimental results indicated that the removal of aniline was influenced by different operational parameters, So that the highest process efficiency was obtained at pH 4, a voltage of 11 V, a concentration of per sulfate anions equal to 750 mg /L and a concentration of 60 mg /L of pollutant, 90.41% in a 25 minute period. It was also found that with an increase of nitrogen gas, efficiency will be increase and aeration reduces efficiency. Conclusion: The present study demonstrated the proper performance of the process in removing organic pollutants under optimal conditions of use as well as an alternative technology for the treatment of industrial wastewater containing Aniline.
کلیدواژه‌ها [English]
electro per sulfate, copper-iron electrodes, aniline, aqueous solution
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