کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
581606 | 1453159 | 2009 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Evaluation of polymer inclusion membranes containing crown ethers for selective cesium separation from nuclear waste solution
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کلمات کلیدی
TEHPDB18C6TBPCTAPIMHPGeTri-n-butyl phosphateHLWSLMPHWRNPOECrown ether - اتر تاجی، کرون اترCellulose triacetate - ترایکتات سلولزSeparation - جداسازیPressurized heavy water reactor - رآکتور آب سنگین تحت فشارRadioactive waste - زباله های رادیواکتیوHigh level nuclear waste - زباله های هسته ای بالاCesium - سزیم، سیزیمPolymer inclusion membrane - غشاء درگیر پلیمرSupported liquid membrane - غشای مایع حمایت شدهHigh purity germanium - ژرمانیوم خلوص بالا
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Evaluation of polymer inclusion membranes containing crown ethers for selective cesium separation from nuclear waste solution Evaluation of polymer inclusion membranes containing crown ethers for selective cesium separation from nuclear waste solution](/preview/png/581606.png)
چکیده انگلیسی
Transport behaviour of 137Cs from nitric acid feed was investigated using cellulose triacetate plasticized polymer inclusion membrane (PIM) containing several crown ether carriers viz. di-benzo-18-crown-6 (DB18C6), di-benzo-21-crown-7 (DB21C7) and di-tert-butylbenzo-18-crown-6 (DTBB18C6). The PIM was prepared from cellulose triacetate (CTA) with various crown ethers and plasticizers. DTBB18C6 and tri-n-butyl phosphate (TBP) were found to give higher transport rate for 137Cs as compared to other carriers and plasticizers. Effect of crown ether concentration, nitric acid concentration, plasticizer and CTA concentration on the transport rate of Cs was also studied. The Cs selectivity with respect to various fission products obtained from an irradiated natural uranium target was found to be heavily dependent on the nature of the plasticizer. The present work shows that by choosing a proper plasticizer, one can get either good transport efficiency or selectivity. Though TBP plasticized membranes showed good transport efficiency, it displayed poor selectivities. On the other hand, an entirely opposite separation behaviour was observed with 2-nitrophenyloctylether (NPOE) plasticized membranes suggesting the possible application of the later membranes for the removal of bulk 137Cs from the nuclear waste. The stability of the membrane was tested by carrying out transport runs for nearly 25 days.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 169, Issues 1â3, 30 September 2009, Pages 472-479
Journal: Journal of Hazardous Materials - Volume 169, Issues 1â3, 30 September 2009, Pages 472-479
نویسندگان
P.K. Mohapatra, D.S. Lakshmi, A. Bhattacharyya, V.K. Manchanda,