حذف رنگ کنگو قرمز از پساب صنایع نساجی توسط سیستم‌های دوفازی آبی

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشیار گروه مهندسی شیمی، دانشگاه گیلان

2 دانش آموخته کارشناسی ارشد مهندسی شیمی، دانشگاه گیلان

چکیده

رنگ‌های آزو یک دسته مهم از ترکیبات رنگزا هستند که به‌طور گسترده در صنایع نساجی استفاده می‌شوند. حجم بالای پساب تولیدی در صنایع نساجی ممکن است منجر به دفع این ترکیبات به محیط زیست و آسیب به آن می‌شود. در دو دهه گذشته، چندین روش‌ فیزیکی و شیمیایی برای حذف رنگ از پساب گزارش شده است که تعداد اندکی از آنها در صنایع نساجی پذیرفته شده‌اند. هدف پژوهش حاضر بررسی پتانسیل استفاده از سیستم‌های دوفازی آبی برای حذف رنگ قرمز کنگو از پساب خروجی صنایع نساجی بود. در این پژوهش سیستم‌های دوفازی آبی مختلف شامل پلی‌اتیلن گلایکول با وزن مولکولی متوسط 1000، 4000 و 8000 گرم بر مول و نمک‌های مختلف سدیم سولفات، سدیم سولفیت و سدیم کربنات برای حذف رنگ کنگو قرمز از پساب مورد آزمایش قرار گرفتند. نتایج نشان داد که سیستم متشکل از پلی‌اتیلن گلایکول با وزن مولکولی 1000 و نمک سدیم سولفیت برای حذف رنگ کنگو قرمز از پساب مناسب‌تر است و در بهترین شرایط عملیاتی (25 درصد وزنی، وزنی پلی‌اتیلن گلایکول 1000 و 7/10 درصد وزنی، وزنی سدیم سولفیت)، راندمان حذف رنگ قرمز کنگو  8/98 درصد به‌دست آمد. نتایج نشان داد که استفاده از سیستم‌های دو فاز آبی برای حذف رنگ قرمز کنگو روش بسیار مناسبی است.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Removal of Congo Red Dye from Textile Wastewater by Aqueous Two-Phase Systems

نویسندگان [English]

  • Gholam Khayati 1
  • Mohammad Avani 2
1 Assoc. Prof., Department of Chemical Engineering, University of Guilan, Rasht, Iran
2 Former Graduate Student in Chemical Engineering, Department of Chemical Engineering, University of Guilan, Rasht, Iran
چکیده [English]

The high volume of wastewater generated in the textile industry and the related die may sometimes be discharge into the environment.  Azo dyes are an important class of dye compounds that are being widely used in textile industry. Several physical and chemical techniques are usually used for the removal of dyes from wastewater and a few of them have been accepted in the textile industries. Specific aim of this study was to investigate the potential use of aqueous two-phase systems in removal of the azo Congo Red dye from the textile wastewater effluent. In this study, the various aqueous two-phase systems containing polyethylene glycol (PEG) with 1000, 4000 and 8000 g/mole of different types of salts including Sodium Sulfate, Sodium Sulfite and Sodium Carbonate. The results of this study showed that the polyethylene glycol with 1000 g/mole including sodium sulfite was most suitable for the removal of the Congo Red dye from textile wastewater with the efficiency of about 98.8 percent. This result was obtained under operating condition consisting of: 25 w/w percent polyethylene glycol 1000 with 10.7 w/w percent sodium sulfite.  From the results of this study we can conclude that the ATPS is an effective method for successfull removal of Congo red dye from textile industry.

کلیدواژه‌ها [English]

  • Gongo Red Dye
  • Aqueous Two Phase System
  • Poly Ethylene Glycol
  • Sodium Salts
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