کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
581178 1453157 2009 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Continuous electrolytic decarbonation and recovery of a carbonate salt solution from a metal-contaminated carbonate solution
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی بهداشت و امنیت شیمی
پیش نمایش صفحه اول مقاله
Continuous electrolytic decarbonation and recovery of a carbonate salt solution from a metal-contaminated carbonate solution
چکیده انگلیسی
This work studied the characteristic changes of a continuous electrolytic decarbonation and recovery of a carbonate salt solution from a metal-contaminated carbonate solution with changes of operational variables in an electrolytic system which consisted of a cell-stacked electrolyzer equipped with a cation exchange membrane and a gas absorber. The system could completely recover the carbonate salt solution from a uranyl carbonato complex solution in a continuous operation. The cathodic feed rate could control the carbonate concentration of the recovered solution and it affected the most transient pH drop phenomenon of a well type within the gas absorber before a steady state was reached, which caused the possibility of a CO2 gas slip from the gas absorber. The pH drop problem could be overcome by temporarily increasing the OH− concentration of the cathodic solution flowing down within the gas absorber only during the time required for a steady state to be obtained in the case without the addition of outside NaOH. An overshooting peak of the carbonate concentration in the recovered solution before a steady state was observed, which was ascribed to the decarbonation of the initial solution filled within the stacked cells by a redundant current leftover from the complete decarbonation of the feeding carbonate solution.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Hazardous Materials - Volume 171, Issues 1–3, 15 November 2009, Pages 606-612
نویسندگان
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