کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
4989527 | 1456929 | 2018 | 9 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Removing rubidium using potassium cobalt hexacyanoferrate in the membrane adsorption hybrid system
ترجمه فارسی عنوان
حذف روبیدیم با استفاده از هگزاسیانوفرات پتاسیم کبالت در سیستم ترکیبی جاذب غشاء
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کلمات کلیدی
روبیدیوم، هیدروکسید سدیم کبالت پتاسیم، مولیبدفسفات آمونیوم، سیستم هیبرید غشایی-جذب، آب دریا
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
تصفیه و جداسازی
چکیده انگلیسی
Highly-priced rubidium (Rb) can be effectively extracted from seawater using potassium cobalt hexacyanoferrate (KCoFC) and ammonium molybdophosphate (AMP) adsorbents in the membrane adsorption hybrid system (MAHS). KCoFC (<0.075Â mm), KCoFC (0.075-0.15Â mm), and AMP (<0.075Â mm) had Langmuir adsorption capacities of 145, 113, and 77Â mg/g at pH 6.5-7.5, respectively. When KCoFC (<0.075Â mm) at a dose of 0.2Â g/L was initially added to 4Â L of a solution containing 5Â mg Rb/L in the MAHS and 25% of the initial dose was repeatedly added every hour, the amount of Rb removed remained steady at 90-96% for the experiment's 26Â h duration. The removal of Rb by AMP under similar conditions was 80-82%. The cumulative Rb removed by KCoFC (<0.075Â mm) in MAHS was only 33% reduced in the presence of high concentrations of other cations in synthetic seawater compared to that in solution containing only Rb. Approximately 30% of the adsorbed Rb was desorbed using 1Â MÂ KCl. When the desorbed solution was passed through a column containing resorcinol formaldehyde (RF), 35% of the Rb in the desorbed solution was adsorbed on RF. Furthermore 50% of the Rb adsorbed on RF was recovered by 1Â MÂ HCl leaching of the column. This sequence of concentration and separation of Rb in the presence of other cations in synthetic seawater is an efficient method for recovering pure Rb from real seawater and seawater reverse osmosis brine.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Separation and Purification Technology - Volume 191, 31 January 2018, Pages 286-294
Journal: Separation and Purification Technology - Volume 191, 31 January 2018, Pages 286-294
نویسندگان
T. Nur, P. Loganathan, M.A.H. Johir, J. Kandasamy, S. Vigneswaran,