نوع مقاله: مقاله پژوهشی

نویسندگان

1 دانشجوی کارشناسی ارشد، شیمی تجزیه ، دانشگاه تحصیلات تکمیلی صنعتی و فناوری پیشرفته، کرمان ، ایران

2 دانشیار ، شیمی تجزیه، دانشگاه تحصیلات تکمیلی صنعتی و فناوری پیشرفته، کرمان، ایران

3 استادیار، شیمی تجزیه ، دانشگاه تحصیلات تکمیلی صنعتی و فناوری پیشرفته، کرمان، ایران

10.22068/jstc.2019.89653.1458

چکیده

وجود ترکیبات آلی سولفوردارمانند دی بنزوتیوفن (DBT) در سوخت های حمل و نقل نه تنها یک منبع عمده باران اسیدی است، بلکه دلیل بسیاری از بیماری های جدی سیستم تنفسی انسان مانند سرطان ریه است. بر این اساس، حذف مؤثر DBT بسیار مهم است. در این پژوهش، نانو ذرات مغناطیسی به روش هم رسوبی سنتز شدند و سپس این نانو ذرات طی فرآیند پلیمریزاسیون اکسایش شیمیایی در محیط مایسلی با استفاده از سدیم دو دسیل سولفات به عنوان سورفکتانت به وسیله لایه نازکی از پلی آنیلین پوشش داده شدند. محصول سنتزی با استفاده از روش‌های میکروسکوپ الکترونی روبشی (SEM)، پراش اشعه ایکس (XRD) و طیف‌سنجی تبدیل فوریه مادون قرمز(FTIR) شناسایی شد.
مدل‌های ایزوترم لانگمویر و فروندلیچ برای مطابقت داده های تعادلی برای نانوکامپوزیت مغناطیسی استفاده شدند. فرآیند جذب به خوبی توسط مدل لانگمویر (9899/0) توصیف می‌شود. جاذب مغناطیسی بیشینه ظرفیت جذب 42/118 میلی گرم بر گرم را در شرایط بهینه (مقدار جاذب؛ 01/0 گرم، زمان تماس؛ 15 دقیقه؛ pH؛ 3/9) فراهم کرد.
و بیشینه ظرفیت جذب 42/118 میلی گرم بر گرم محاسبه گردید.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Preparation of magnetic polyaniline nanocomposite and study its application for the removal of dibenzothiophene

نویسندگان [English]

  • Elham Etehadi 1
  • Daryoush Afzali 2
  • Mansoureh Behzadi 3

1 Department Chemistry, Graduate University of Advanced Technology, Kerman, Iran

2 Department Chemistry, Graduate University of Advanced Technology, Kerman, Iran

3 Department Chemistry, Graduate University of Advanced Technology, Kerman, Iran

چکیده [English]

The existence of organosulfur compounds such as dibenzothiophene (DBT) in transportation fuels is not only a major source of acid rain, but also the reason many serious diseases of human respiratory system, such as lung cancer. Accordingly, efficient removal of DBT is very important. In the present work, magnetic nanoparticles were synthesis by co-precipitation method and then, these nanoparticles were covered with thin layer of polyaniline by chemical oxidation polymerization method in micellar medium using sodium dodecyl sulfate as surfactant. The synthetic product was characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and Fourier transform infrared spectroscopy (FTIR). Langmuir and Freundlich isotherm models were used to fit equilibrium data for magnetic nanocomposite. Adsorption process could be well described by the Langmuir model (0.9899). The magnetic adsorbent afforded a maximum adsorption capacity of 118.42 mg g-1 at the optimized conditions (adsorbent dose, 0.01g; contact time, 15 min and pH, 9.3).

کلیدواژه‌ها [English]

  • Nanocomposite
  • Dibenzothiphene removal
  • Sorbent

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