بهینه‌سازی حذف رنگزای قرمز 46 به‌وسیله جاذب پلیمری- مغناطیسی تهیه شده از الیاف پلی‌اکریلونیتریل‌

نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانش آموخته کارشناسی ارشد، گروه محیط ‌زیست، دانشکده منابع طبیعی و علوم زمین، دانشگاه کاشان، کاشان، ایران

2 استادیار، گروه محیط زیست، دانشکده منابع طبیعی و علوم زمین، دانشگاه کاشان، کاشان، ایران

3 دانشیار، دانشکده معماری و هنر، دانشگاه کاشان، کاشان، ایران

4 دانشیار، گروه محیط زیست، دانشگاه صنعتی اصفهان، اصفهان، ایران

5 دانش‌آموخته دکترای نانوشیمی، پژوهشکده نانو، دانشگاه کاشان، کاشان، ایران

چکیده

فاضلاب صنایع نساجی برای موجودات زنده سمی است. این فاضلاب باعث تغییراتی مانند کاهش شفافیت آب، کاهش نفوذپذیری نور خورشید و افزایش COD می‌شود. از این رو، این پژوهش با هدف جداسازی رنگزای کاتیونی 46 از محلول آبی انجام شد. به این منظور کامپوزیت پلیمری مغناطیسی در اندازه میکرو از نانوذرات اکسید گرافیت و نانوذرات مگنتیک (MNP) در ماتریسی از الیاف پلی‌اکریلونیتریل بر اساس روش الکترواسپینینگ تهیه شد. شناسایی ویژ‌گی‌های جاذب پلیمری با استفاده از روش XRD و SEM انجام شد. با استفاده از آنالیز ارتعاشات مغناطیسی نمونه (VSM) میزان مغناطیس اشباع نانوذرات مگنتیک و جاذب پلیمری اندازه‌گیری شد. آزمایش‌های جذب سطحی با استفاده از روش تاگوچی طرح‌ریزی شد. اثر متغیرهای pH، مقدار جاذب، غلظت اولیه رنگزا و زمان تماس بر حذف رنگزا مورد بررسی قرار گرفت و پارامتر pH مؤثرترین فاکتور در حذف رنگزا بود. داده‌های ایزوترم جذب نشان داد که جذب رنگزا با مدل فروندلیچ تطابق بهتری دارد)99/0 = R2). علاوه بر این، سینتیک جذب رنگزا از مدل شبه مرتبه دوم پیروی کرد. بر اساس نتایج، ترکیب پلیمری ساخته شده، جاذبی مؤثر برای حذف رنگزا با راندمان بیش از 96درصد و قابلیت جداسازی سریع و راحت از محلول آبی است.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Optimization of Red 46 Dye Removal Using Magnetic Polymeric Adsorbent Prepared from Polyacrilonitrile Fibers

نویسندگان [English]

  • Kamran Rahimi 1
  • Rouhollah Mirzaei 2
  • Ahmad Akbari 3
  • Nourollah Mirghaffari 4
  • Arash Yoonesnia 5
1 Former Graduate Student, Dept. of Environment, Faculty of Natural Resources and Earth Science, University of Kashan, Kashan, Iran
2 Assist. Prof., Dept. of Environment, Faculty of Natural Resources and Earth Science, University of Kashan, Kashan, Iran
3 Assoc. Prof., Dept. of Art and Architecthre, University of Kashan, Kashan, Iran
4 Assoc. Prof., Dept. of Environment, Isfahan University of Tech., Isfahan, Iran
5 PhD of Nanochemistry, University of Kashan, Kashan, Iran
چکیده [English]

Textile industry wastewater in additions toxicity for organisms led to changes as decreased of water transparency and sunlight penetration and increase in chemical oxygen demand. Therefore, this study was carried out with the aim of removal of cationic red 46 dye from aqueous solution. For this purpose, the magnetic polymeric composite of graphite oxide nanoparticles (GO) and magnetic nanoparticles (MNP) in the matrix of polyacrilonitrile fiber (WPAN) at micro size by electroespining method was prepared. The XRD and SEM tests were used to determine the polymeric adsorbent characteristics. Magnetic properties of magnetic nanoparticles and polymeric adsorbent were measured at using vibrating sample magnetometer (VSM) analysis. Batch adsorption tests were optimized using the L16 orthogonal array of Taguchi method. The effects of variables including pH, adsorbent dosage, initial dye concentration and contact time on the dye removal were examined and the most influential factor in the removal of dye was pH. The adsorption isotherm data were well-fitted to Freundlich isothermal model (R^2= 0.99). Furthermor, adsorption kinetics of the dye followed pseudo-second-order model. Basic on these results, the polymeric composites was effective adsorbent for dye removal with efficiency over 96% and with quick separation for dye removal from aquatic solution.

کلیدواژه‌ها [English]

  • Polymeric Adsorbent
  • Cationic Red 46 Dye
  • optimization
  • Dye removal

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