نشریه علمی فرآیند نو

نشریه علمی فرآیند نو

بررسی تاثیر فعال سازی شیمیایی و حفره‌زای نانومتری بر عملکرد جاذب کربنی بر پایه پلی‌اکریلونیتریل جهت حذف رنگ کاتیونی از محلول آبی

نوع مقاله : پژوهشی

نویسندگان
1 دانشجو، دانشکده مهندسی پلیمر، دانشگاه صنعتی سهند، تبریز، ایران
2 دانشیار، دانشکده مهندسی پلیمر، دانشگاه صنعتی سهند، تبریز، ایران
3 استادیار/ مرکز تحقیقا کربن سبز، دانشکده مهندسی شیمی، دانشگاه صنعتی سهند، تبریز، ایران
چکیده
این مطالعه، به بررسی تاثیر افزودن عامل حفره‌زا پلی‌متیلمتاکریلات (PMMA) به‌‌همراه عامل‌ فعال‌ساز هیدروکسیدپتاسیم (KOH) به منظور سنتز جاذب‌های کربنی پلی‌آکریلونیتریل (PAN) با تخلخل بالا جهت افزایش عملکرد جاذب در جذب رنگ متیلن بلو(MB) می‌پردازد. نانو ذرات PMMA با روش پلیمریزاسیون مینی امولسیونی سنتز شد. از آنالیز‌های BET، FE-SEM-EDX و FTIR برای ارزیابی جاذب‌های کربنی استفاده گردید. مساحت سطح‌ویژه در PAN خالص از 10/6 به m2/g 393/6 در هنگام استفاده از ذرات PMMA، و پس از فعال‌سازی به m2/g 1897 افزایش یافت. نتایج FTIR حذف گروه‌های کربونیل و وجود گروه‌های عاملی مؤثر پس از فعال‌سازی را تأیید کرد. پس‌از فعال‌سازی همزمان، درصد حذف MB توسط جاذب کربنی از %54 به %91 افزایش یافت. حداکثر ظرفیت جذب برای بهترین نمونه، mg/g 2065 بوده که از ایزوترم‌ ‌لانگمویر پیروی می‌کند. نتایج نشان داد استفاده ترکیبی از این دو عامل در ساختار PAN، افزایش چشمگیری در توسعه حفرات، بهبود ظرفیت جذب و نهایتا افزایش عملکرد جاذب کربنی داشته است.
کلیدواژه‌ها
موضوعات

عنوان مقاله English

The effect of chemical activator and nanoscale pore-former on the performance of polyacrylonitrile-based carbon adsorbent for cationic dye removal from aqueous solution

نویسندگان English

zahra hosseini 1
morteza nasiri 2
Reza Khoshbouy 3
1 Institute of Polymeric Materials and Faculty of Polymer Engineering, Sahand University of Technology, Tabriz, Iran
2 Institute of Polymeric Materials and Faculty of Polymer Engineering, Sahand University of Technology, Tabriz, Iran
3 Green Carbon Research Center, Faculty of Chemical Engineering, Sahand University of Technology, Tabriz, Iran
چکیده English

This study investigated the effect of using polymethyl methacrylate (PMMA) as pore-forming agent along with potassium hydroxide (KOH) activator to synthesize polyacrylonitrile (PAN) carbon adsorbents with high porosity to enhance the adsorbent performance in methylene blue (MB) adsorption. PMMA nanoparticles were synthesized by mini-emulsion polymerization method. BET, FE-SEM-EDS and FTIR analyses were used to evaluate the carbon adsorbents. The specific surface area of ​​ PAN_based adsorbents increased from 10.6 to 393.6 m2/g with PMMA particles, and to 1897 m2/g after activation. FTIR results confirmed the removal of carbonyl groups and the presence of effective functional groups after activation. After simultaneous activation, the percentage of MB removal by the carbon adsorbent increased from 54% to 91%. The maximum adsorption capacity for the best sample was 2065 mg/g, which followed the Langmuir isotherm. The results showed that this combination method significantly increased the pore development, the adsorption capacity, and ultimately increased the performance of the carbon adsorbent.

کلیدواژه‌ها English

Polyacrylonitrile
Polymethyl Methacrylate
Potassium Hydroxide
Carbon Adsorbent
Methylene Blue
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