نوع مقاله : مقاله پژوهشی
نویسندگان
- بهراد شقاقی
- سیمیندخت شیروانی آرانی
- ایمان دهقان
- سید میلاد میرعماد
- شایان مطمئن اصفهانی
- محسن طبسی
- علی بهرامی سامانی
- محمد قنادی مراغه
پژوهشکده چرخه سوخت هسته‌ای، پژوهشگاه علوم و فنون هسته‌ای، سازمان انرژی اتمی ایران، صندوق پستی: 8486-11365، تهران- ایران
چکیده
به منظور تولید رادیوایزوتوپ تکنسیم-۹۹ حاصل از واپاشی رادیواکتیو مولیبدن-۹۹ و خالص‌سازی محصول حاصل از فرایند انحلال اسیدی هدف مینیاتوری، لازم است آلودگی ید گازی در حد قابل قبولی کاهش یابد. به این منظور از جاذب‌های جامد استفاده می‌شود. یکی از بهترین جاذب‌های مورد استفاده از موردنیت حاوی نقره تشکیل شده است. در این پژوهش روش سنتز و مشخصات جاذب سنتز شده مورد بررسی قرار گرفته است. برای تهیه این جاذب بلورهای موردنیت حفره‌دار با اندازه حدود ۱۰ میکرومتر و نسبت آلومینیم به سیلیکون برابر 2/5 سنتز شد و پس از آن با استفاده از عوامل خمیرکننده، پایدارکننده و متخلخل‌کننده به شکل گرانول درآمد. گرانول‌های تهیه شده موردنیت با نقره جایگزین شد که درصد وزنی نقره در آن برابر ۱/۸ ارزیابی شد. نتایج حاصل از ارزیابی جذب ید گازی توسط جاذب تهیه شده نشان‌دهنده درصد جذبی برابر با ۲/۹۹ درصد می‌باشد.
کلیدواژه‌ها
عنوان مقاله [English]
Synthesis of iodine-sorbent with applicability in decontamination of the gaseous phase of the dissolution stage of Fission-Molly production
نویسندگان [English]
- B. Shaghaghi
- S.D. Shirvani-Arani
- I. Dehghan
- S.M. Miremad
- Sh. Motmaen Esfahani
- M. Tabasi
- A. Bahrami-Samani
- M. Ghannadi Maragheh
Nuclear Fuel Cycle Research School, Nuclear Science and Technology Research Institute, AEOI, P.O.Box:11365-8486, Tehran-Iran
چکیده [English]
To produce the Technetium-99 isotope from Molybdenum-99 radioactive decay and purify the product of small-scale acidic target dissolution, the gaseous Iodine impurity has to be reduced to AN acceptable level. Solid adsorbents are used for this reason. One of the best adsorbents is based on Silver-Exchanged Mordenite. In this research, the synthesis procedure and characteristics of synthesized adsorbent have been discussed. To prepare solid adsorbent, spheric mordenite hallow crystals of about 10 micrometers and the Si/Al ratio of 5.2 were synthesized and granulated using a binding agent, stabilizer, and foaming agent. Prepared granules were silver exchanged. The silver content of the end product was evaluated 8.1 weight percent. Results from gaseous Iodine adsorption showed that 99.2 percent of passing Iodine was adsorbed.
کلیدواژه‌ها [English]
- Adsorption
- Gaseous Iodine
- Silver-exchanged Mordenite
- Dissolution
- Mo-99
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