حذف رنگ‌های راکتیو از پساب‌های نساجی با استفاده از کربن فعال حاصل از پسماندهای دانه کنجد روکش‌شده با پلی‌وینیل‌الکل

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانش‌آموخته کارشناسی ارشد، دانشکده شیمی، دانشگاه سمنان

2 استادیار دانشکده شیمی، دانشگاه سمنان

3 دانشیار دانشکده شیمی، دانشگاه یزد

چکیده

در این پژوهش، خواص جذبی کربن فعال تهیه شده از پسماند حاصل از دانه‌های روغن‌کشی شده کنجد که با پلی‌وینیل‌الکل روکش شده‌ بودند، برای حذف رنگهای راکتیو قرمز 198 و آبی 19 از پساب صنایع نساجی مطالعه شد. مجموعه فرایند برای تعیین تعدادی از فاکتورهای مؤثر در ظرفیت جذبی پلی‌وینیل‌الکل مورد استفاده قرار گرفت و تأثیر pH، مقدار جاذب، زمان تماس و غلظت اولیه رنگ بررسی شد. همچنین ایزوترم‌های جذبی و سینتیکی واکنش مطالعه شد. در این پژوهش بالاترین حذف رنگ در pH برابر ۳ به‌دست آمد. بازده حذف رنگ از پساب همراه با افزایش زمان تماس برای هر دو رنگ تا 90 دقیقه افزایش یافت. سینتیک جذب رنگ‌های آبی و قرمز از مدل شبه ‌درجه دوم تبعیت کرد. غلظت رنگ‌های آبی و قرمز در پساب به‌روش اسپکتروفتومتری به‌ترتیب در طول موج‌های 590 و 517 نانومتر اندازه‌گیری شد. مجموعه نتایج نشان داد که پلی‌وینیل‌الکل قابلیت خوبی در جذب رنگ دارد و می‌توان از آن به‌عنوان یک جاذب مؤثر، ارزان‌قیمت و در ‌دسترس برای تصفیه پساب صنایع نساجی استفاده کرد.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Removal of Reactive-dyes from Textile Plant Effluents Using Polyvinyl Alcohol-coated Active Carbon obtained from Sesame Seeds

نویسندگان [English]

  • Sheida Moradi- Nasab 1
  • Sahar Belyani 1
  • Mahdi Behzad 2
  • Fatemeh Tamadon 3
1 Former Graduate Student, Dept. of Chemistry, Semnan University, Semnan, Iran
2 Ass. Prof., Dept. of Chemistry, Semnan University, Semnan, Iran
3 Assoc. Prof., Dept. of Chemistry, University of Yazd
چکیده [English]

In this study, the adsorption of active carbon derived from waste sesame seeds coated with polyvinyl alcohol (AC/PVA) was investigated for removing red 198 and blue 19 reactive dyes from textile effluents. The batch process was carried out to identify such parameters as pH, adsorbent dose, contact time, and initial dye concentration involved in the dye removal adsorption capacity of AC/PVA. Also, batch kinetic and isotherm experiments were conducted. Results indicated that the maximum dye removal was obtained in an acidic pH over 90 min of contact time and that adsorption rates followed the pseudo-second-order kinetics. Blue and red dye concentrations were determined using the spectrophotometric method at 590 and 517 nm, respectively. It may be concluded that AC/PVA is capable of removing blue and red reactive dyes and can be used as an efficient, cheap, and accessible adsorbent for treating textile effluents.

کلیدواژه‌ها [English]

  • reactive dye
  • Carbon Active
  • polyvinyl alcohol
  • Wastewater
  • Adsorption
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