نوع مقاله : مقاله پژوهشی

نویسندگان

1 پژوهشکده‌ی‌ رآکتور و ایمنی هسته‌ای، پژوهشگاه علوم و فنون هسته‌ای، سازمان انرژی اتمی ایران، صندوق پستی: 1339-14155، تهران ـ ایران

2 گروه شیمی، دانشکده علوم، دانشگاه آزاد اسلامی واحد شهرضا، کدپستی: 8648146411، شهرضا - ایران

10.24200/nst.2022.1452

چکیده

در تحقیق حاضر نانوذرات هیدروکسی آپاتیت مغناطیسی (/HAp 4O3Fe) به منظور جذب و حذف یون‌های اورانیل برای اولین بار به روش هم­رسوبی تهیه شدند. برای این کار جاذب‌هایی با نسبت‌‌های وزنی متفاوت (/HAp 4O3Fe)، (1:1)، (1:2)، (1:3) و (1:5) تهیه شدند. پس از مشخصه‌یابی فیزیکی، شیمیایی و مغناطیسی توانایی آن‌ها در جذب یون اورانیل از طریق سنجش اورانیل به روش طیف­سنجی جذب ماوراء بنفش - مریی با استفاده از عامل کمپلکس‌کننده آرسنازو (III) پی‌گیری شد. اثر پارامترهای تجزیه‌‌ای از قبیل دما، pH، مدت تماس، مقدار جاذب، غلظت محلول اورانیل و اثر مزاحمت سایر کاتیون‌‌ها بر میزان جذب اورانیل توسط جاذب بررسی شد. آزمایشات نشان داد مقدار 015/0 گرم از نمونه /HAp 4O3Fe (1:5)، در 7 pH و در مدت زمان 150 دقیقه بیش‌ترین میزان اورانیل را جذب و حذف می‌کند. نانوذرات تهیه شده در ابعاد nm 17±2، قادر به جذب اورانیل در غلظت بینppm  100-2/0 بوده و بیش از 96‌% اورانیل را حذف ‌می‌نمایند. در دمای C˚ 25 ظرفیت جذب mg/g 82/99 به دست آمد. نتایج حاصله توانایی بالای این نانوذرات در جذب و حذف اورانیل و پتانسیل بالای آن‌ها در تصفیه پساب‌های حاوی اورانیل، را نشان می‌دهد.

کلیدواژه‌ها

عنوان مقاله [English]

Magnetically assisted uranyl removal by using magnetic hydroxyapatite nanocomposite

نویسندگان [English]

  • M. Bagherzadeh 1
  • D. Saberi 2

1 1. Reactor and Nuclear Safety Research School, Nuclear Science and Technology Research Institute, AEOI, P.O.Box: 14155-1339, Tehran - Iran

2 Department of Chemistry, Faculty of Science, Islamic Azad University of Shahreza, Postal Code: 8648146411, Shahreza - Iran

چکیده [English]

Magnetic hydroxyapatite nanoparticles (Fe3O4/HAP) are prepared in the present work to remove uranyl ions via copercipitation method for the first time. The sorbent was prepared with the weight ratio of magnetic nanoparticles to hydroxyapatite (Fe3O4/HAP) as (1:1), (1:2), (1:3), and (1:5). After finding physical, chemical, and magnetic features, their ability to absorb uranyl ions was examined via UV-Vis method, measuring the absorbance of element complex with arsenazo (III). The effects of parameters such as temperature, pH, contact time, rate of the adsorbent, the concentration of uranyl, and the effects of interference of other ions on the removal of uranyl were analyzed. Also, the experiments showed that the highest rate of uranyl was absorbed by using 0.015 g Fe3O4/HAP (1:5) during 150 min at pH equal to 7. The prepared nanoparticles in 17±2 nm could absorb uranyl in the concentration range of 0.2-100 ppm, eliminating over 96% of uranyl. The absorbing capability of 99.82 mg/g was obtained at 25°C. The results indicate the high potential of the prepared nano-particles in absorbing and eliminating uranyl and show its capability in the waste water containing uranyl.

کلیدواژه‌ها [English]

  • Uranyl
  • Magnetic Nanoparticles
  • Hydroxyapatite
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