هیدروژل‌های نانوچندسازه برپایه ژلاتین و نانوذرات اکسید نیکل برای جذب آلاینده‌های کاتیونی

نوع مقاله : مقاله پژوهشی

نویسندگان

گروه شیمی، دانشکده علوم ‌پایه، دانشگاه بین‌المللی امام خمینی(ره)، قزوین، ایران

چکیده

در این مطالعه، هیدروژل‌های نانوچند‌سازه‌ بر پایه ژلاتین و نانوذرات اکسید نیکل با استفاده از تک‌پارهای آکریل‌آمید (AAm) و 2-آکریل‌آمیدو-2-متیل‌پروپان‌سولفونیک‌اسید (AMPS) از طریق پلیمری‌شدن رادیکالی با استفاده از ‌پرسولفات آمونیم به عنوان آغازگر و متیلن‌بیس‌آکریل‌آمید به عنوان شبکه‌ساز، تهیه شدند. ساختار هیدروژل‌های نانوچند‌سازه به وسیله طیف‌سنجی زیر قرمز (FT-IR)، تجزیه وزن‌سنجی حرارتی (TGA)، میکروسکوپ الکترونی روبشی (SEM) و میکروسکوپ الکترونی (TEM) شناسایی شد. جذب ماده رنگزای بنفش بلوری به عنوان نمونه‌ای از مواد رنگزای کاتیونی با تغییر عوامل مختلف مانند زمان تماس، دما، pH و غلظت اولیه ماده رنگزا بررسی شد. در شرایط بهینه، بیشترین مقدار جذب ماده رنگزا از محلول‌های آبی در غلظت‌های پایین (ppm10) حدود 97.5 درصد و در غلظت‌های بالا (ppm700) حدود 99.5 درصد به دست آمد. نتایج به‌دست‌آمده از این تحقیق نشان داد که این هیدروژل‌ها می‌توانند به عنوان جاذب‌هایی کارآمد برای حذف مواد رنگزای کاتیونی از محلول‌های آبی به کار روند. همچنین فرآیند جذب ماده رنگزا از الگوی جذب لانگمویر و سینتیک شبه مرتبه دوم پیروی می‌کند.

کلیدواژه‌ها

موضوعات


عنوان مقاله [English]

Nanocomposite Hydrogels Based on Gelatin and Nickel Oxide Nanoparticles for Adsorption of Cationic Pollutants

نویسندگان [English]

  • H. Ghasemzadeh Mohammadi
  • A. Keshtkar Vanashi
  • M. Taghipour Ziaratgah
  • M. Pirgholi
Department of Chemistry, Faculty of Basic Science, Imam Khomeini International University, Qazvin, Iran
چکیده [English]

In this study, a nanocomposite hydrogel was synthesized based on gelatin and nickel oxide nanoparticles using acrylamide (AAm) and 2-Acrylamido-2-methylpropane sulfonic acid (AMPS) by radical polymerization method. The reaction was performed in the presence of ammonium presulfate as an initiator and methylene bis acrylamide as a crosslinker. The structure of nanocomposite hydrogels were characterized by Fourier transform infrared spectroscopy (FT-IR), thermal gravimetric analysis (TGA), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). Crystal violet was selected as a template for cationic dyes. The adsorption was optimized by changing various parameters such as contact time, temperature, pH, and initial concentration of dye. In optimal conditions, the maximum amount of dye adsorption from aqueous solutions at low concentrations (10 ppm) was approximately 97.5%, and at high concentrations (700 ppm) was about 99.5%. The results of this study showed that the hydrogels can be applied as efficient absorbent for the removal of cationic dyes from aqueous solutions. The adsorption process follows Langmuir isotherm model and pseudo second order kinetic. 

کلیدواژه‌ها [English]

  • Acrylamide
  • nanocomposite hydrogels
  • gelatin
  • Crystal Violet
  • Dye adsorption
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