کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7043554 | 1456913 | 2018 | 16 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Process for separation of technetium from alkaline low level waste using di-tert-butyldibenzo-18-crown-6â¯+â¯isodecyl alcohol/n-dodecane solvent
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Process for separation of technetium from alkaline low level waste using di-tert-butyldibenzo-18-crown-6â¯+â¯isodecyl alcohol/n-dodecane solvent Process for separation of technetium from alkaline low level waste using di-tert-butyldibenzo-18-crown-6â¯+â¯isodecyl alcohol/n-dodecane solvent](/preview/png/7043554.png)
چکیده انگلیسی
Di-tert-butyldibenzo-18-crown-6 ether (CE) dissolved in a mixture of isodecyl alcohol and n-dodecane has been investigated for separation of technetium from alkaline low level waste (LLW). Technetium present as TcO4â pairs with sodium ion-crown ether complex formed due to high sodium nitrate concentration in the waste solution results in extraction of TcO4â by ion-pair formation of the kind Na+·CE·TcO4â. Stoichiometry of the extracted complex as determined by slope analysis of log-log plot of technetium distribution ratio (DTc) vs. the CE concentration suggests a combining ratio of 1 TcO4â to 1 CE. Extraction of TcO4â was examined from aqueous phase with varying NaNO3 and NaOH concentrations. DTc was found to increase with increase in Na+ concentration having NO3â or OHâ as counter ions, however, above 5â¯M concentrations of them, DTc remained constant for NaOH while it decreases for NaNO3 due to a strong competitive extraction of NO3â ion compared to OHâ. Quantitative stripping of TcO4â was achieved in three consecutive contact of loaded organic with deionized water.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Separation and Purification Technology - Volume 207, 22 December 2018, Pages 416-419
Journal: Separation and Purification Technology - Volume 207, 22 December 2018, Pages 416-419
نویسندگان
J.N. Sharma, Prithwish Sinharoy, B. Kharwandikar, Vidya S. Thorat, V. Tessy, C.P. Kaushik,