بررسی و مقایسه حذف رنگزایAcid Red 37 با فرایندهای الکتروفنتون و الکتروکواگولاسیون

مینا رضائی, سیده فرخ حسینی شکرابی, مهدی ورسه ای, عبداله سمیعی بیرق

چکیده


فاضلاب‌های رنگی صنایع نساجی به‌ویژه ترکیبات آزو معمولاً حاوی مواد سمی و پایدار در محیط‌زیست هستند. بنابراین بررسی کارایی روش‌های متعدد در حذف آن‌ها ضروری است. ترکیب رنگی Acid red 37 از نظر ساختار در گروه رنگ‌های منو آزو قرار دارد که در حال حاضر در صنایع نساجی کاربرد وسیعی یافته است. هدف از این تحقیق بهینه‌سازی عوامل مؤثر و مقایسه روش‌های الکتروفنتون و الکتروکواگولاسیون در حذف Acid Red 37 است. در این تحقیق فاضلاب مورد آزمایش از نوع سنتزی و رنگ Acid Red 37 تهیه و در مقیاس پایلوت انجام شد. پارامترهای مؤثر مانند غلظت، pH، دانسیته جریان الکتریکی و دما بر کارایی هر دو فرایند مورد بررسی قرار گرفت و درنهایت مقادیر بهینه هریک از پارامترها و میزان انرژی مصرفی در راندمان 90 درصد تعیین شد. درنهایت جهت بررسی تجزیه آلاینده و ترکیبات تولیدی، آنالیز GC-Mass صورت گرفت. شرایط بهینه جهت حذف آلاینده در روش الکتروفنتون شامل 3= pH، مدت زمان واکنش min160، دانسیته جریان الکتریکی معادل mA/cm230 در غلظت mg/L 50 با میزان انرژی مصرفی KWh/Kg Dye removal 8/142 بود. در روش الکتروکواگولاسیون 7pH = ، مدت زمان واکنش min120، دانسیته جریان الکتریکی معادل mA/cm230 در غلظت mg/L 150 با میزان انرژی مصرفی KWh/Kg Dye removal 2/130 بود. نتایج حاصل نشان داد که هر دو روش قابلیت حذف Acid red 37 را دارند اما روش الکتروکواگولاسیون نسبت به الکتروفنتون راندمان بالاتری دارد و می‌تواند به‌عنوان گزینه برتر معرفی شود.


واژگان کلیدی


نساجی-Acid red 37-الکتروفنتون- الکتروکواگولاسیون-GC-Mass

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