جذب آنیلین از پساب مصنوعی توسط نانوذرات مغناطیسی اکسید آهن (Fe3O4) و کربن فعال

نوع مقاله : مقاله پژوهشی

نویسندگان

1 دانشیار، گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی ایران، تهران، ایران

2 دانشجوی دکترای تخصصی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی جندی شاپور، اهواز

3 استاد، دانشکده بهداشت، دانشگاه علوم پزشکی تهران، ایران

4 استاد، دانشکده بهداشت، دانشگاه علوم پزشکی ایران، تهران، ایران

5 استادیار، گروه مهندسی بهداشت محیط، دانشکده بهداشت، دانشگاه علوم پزشکی ایران، تهران، ایران

چکیده

در مطالعه حاضر با استفاده از کربن فعال پودری (PAC) و نانوذرات اکسید آهن (III)، نانوذرات مغناطیسی Fe3O4-کربن فعال (Fe3O4-AC MNPs) به‌روش هم ترسیبی سنتز شد و به‌عنوان جاذب برای جذب آنیلین مورد استفاده قرار گرفت. ویژگی‌ها و مشخصات فیزیکی جاذب با استفاده از آنالیزهای XRD ، SEM ، TEM و BET بررسی شد و همچنین پارامترهای مؤثر فرایند جذب نظیر pH، زمان تماس، دز جاذب، غلظت اولیه آنیلین و دما مورد بررسی قرار گرفتند. داده‌های حاصل از آزمایش‌ها با مدل‌های ایزوترم فروندلیچ و لانگمیر و دو مدل سینتیکی شبه درجه اول و شبه درجه دوم بررسی شدند. نتایج نشان داد که جذب آنیلین روی  Fe3O4- AC MNPs از مدل ایزوترم لانگمیر و مدل سینتیکی شبه درجه دوم پیروی می‌کند. مطابق با مدل لانگمیر حداکثر ظرفیت جذب آنیلین در دمای 20 درجه سلسیوس و دز بهینه 2 گرم در لیتر جاذب و pH برابر 6، 91/90 میلی‌گرم بر گرم شد. نهایتاً، پارامترهای ترمودینامیکی محاسبه گردید؛ مقادیر منفی H0∆ (140- کیلوژول بر مول) نشان از اگزوترمیک بودن این فرایند داشت. جاذب سنتز شده (کربن فعال مغناطیسی) به‌دلیل دارا بودن مزایایی چون جداسازی ساده و سریع از محلول می‌تواند به‌عنوان یک جاذب مؤثر و مفید برای حذف آلاینده‌ها از آب و فاضلاب به‌کار رود.

کلیدواژه‌ها

موضوعات

عنوان مقاله [English]

Aniline Adsorption from Effluent Synthetic by Magnetic Nanoparticles of Iron Oxide (Fe3O4) and Activated Carbon

نویسندگان [English]

  • Ahmad Jonidi Jafari 1
  • Roshanak Rezaei kalantari 1
  • babak kakavandi 2
  • سیمین ناصری 3
  • Ahmad Ameri 4
  • Ali Esrafily dizchi 5
1
2
3
4
5
چکیده [English]

In this study powder activated carbon (PAC) and Fe3O4 magnetic nanoparticles were combined by using co-precipitation method to preparation of magnetic nanoparticles Fe3O4-activated carbon (Fe3O4-AC MNPs) as an adsorbent for removal of aniline from wastewater. Physical characteristic properties of adsorbent were analyzed by SEM, TEM, XRD and BET. Also, the effect of various parameters such as pH, contact time, adsorbent dosage, initial aniline concentration and solution temperature were investigated. The experimental data considered by Langmuir and Freundlich adsorption isotherms and two models kinetically of pseudo first-order and pseudo second-order. The results showed that the adsorption followed Langmuir and pseudo second-order models. According to Langmuir isotherm, the maximum adsorption capacity was 90.91 mg/g at pH 6, and adsorbent (magnetic activated carbon) due to have advantages such as easy and rapid separation from solution could be applied as an effective and useful adsorbent for removal of pollutants from water and wastewater.

کلیدواژه‌ها [English]

  • Magnetic activated carbon
  • Adsorption
  • aniline
  • Iron Oxide Nanoparticles
  • Fe3O4

مراجع

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مجله آب و فاضلاب
دوره 25، شماره 3 - شماره پیاپی 3
پیاپی: 91
مرداد و شهریور 1393
صفحه 2-12

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