نوع مقاله : مقاله پژوهشی

نویسنده

پژوهشکده‌ی چرخه‌ی سوخت هسته‌ای، پژوهشگاه علوم و فنون هسته‌ای، سازمان انرژی اتمی ایران

چکیده

با استفاده از نانوذرات مغناطیسی اصلاح شده با سیانکس 302، یک جاذب مغناطیسی برای استخراج یون­های توریم و اورانیم از محیط­‌های نیتراتی ساختگی فراهم شد. توانایی و قابلیت نانوذرات مغناطیسی (10nm≈) پوشش داده شده با سیانکس 302 برای استخراج و پیش‌­تغلیظ هم­‌زمان توریم و اورانیم از محیط نیتراتی در روش ناپیوسته ارزیابی شد. اثر مقدار لیگاند، pH محیط، و غلظت اولیه­‌ی محلول یون­های فلزی بر رفتار استخراجی یون­‌های توریم و اورانیم بررسی شد. داده­‌های آزمایشگاهی حاکی از آن است که نسبت وزنی بهینه‌­ی سیانکس 302 به نانوذرات مغناطیسی، 10% وزنی، و مقدار pH بهینه­‌ی محلول برای استخراج هم‌­زمان یون­‌های توریم و اورانیم برابر با 6 است. این مقدار سیانکس قابلیت جذب  60 mg/Iیون توریم و اورانیم را دارد. تأثیر حضور محصولات شکافت [(I)Sr(II),Cs] و یون­‌های مزاحم از جمله (III)Mn(II),Mg(II),Cr (III),Fe و (III)Al نیز بررسی شد.

کلیدواژه‌ها

عنوان مقاله [English]

Solid Phase Extraction of Thorium (IV) and Uranium (VI) from Nitrate Medium Using Cyanex 302-Coated Magnetic Nanoparticles

نویسنده [English]

  • S A. Milani

چکیده [English]

Magnetic nanoparticles modifdied with Cyanex 302 were used for the separation and preconcentration of Th(IV) and U(VI) from synthetic nitrate solutions. The capacity of magnetic nanoparticles (≈10 nm) coated with Cyanex 302 for simultaneous separation and preconcentration of thorium and uranium from the nitratemedium was studied by means of the batch method. The effects of analytical parameters, including the amount of Cyanex 302, pH, and initial metal concentration on the extractive behavior of metal ions were systematically studied. The results showed that the optimum weight ratio of Cyanex 302 to magnetite nanoparticles was 10% and the optimum pH of solution for the simultaneous extraction of Th(IV) and U(VI) was equal to 6. The maximal capacity of the magnetite nanoparticles modifdied with 10w% Cyanex 302 was found to be 60 mg l-1 of thorium and uranium. The influences of the fission products [Cs(I), Sr(II)] and interfering ions, including Fe(III), Cr(III), Mg(II), Mn(II) and Al(III) were also investigated

کلیدواژه‌ها [English]

  • Solid Phase Extraction
  • Thorium and Uranium
  • Cyanex 302
  • Magnetic Nanoparticles
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