Co-Extraction of Uranium and Mercury Using Ion Exchange from Cemented Radioactive Waste Sulfuric Leachate in Iodide Media
نویسندگان
چکیده
The production of medical isotopes in Chalk River Laboratories facilities (Chalk River, ON, Canada) has resulted a large quantity cemented radioactive waste (CRW) containing valuable elements such as uranium. From the perspective recovering and ultimately recycling from CRW, solubilization key constituents uranium, mercury, cesium been previously investigated using H2SO4/KI. However, to achieve these elements, separation must be performed they are co-solubilized. In this study, extraction uranium mercury by chelating resin Lewatit TP260 surrogate (SCRW) leaching solution sulfuric media presence iodide was investigated. Extraction U Hg assessed function concentration KI (0.12 M 0.24 M) used during SCRW dissolution process. Continuous experiments showed that functional group, aminomethylphosphonic acid, had high affinity for U. Mercury also extracted onto TP260. increased competition between adsorbed stationary phase iodide–mercury complexes mobile phase. Additionally, reusability tested through desorption cycles. Due trivalent cation, capacity decreases with number
منابع مشابه
uranium in municipal solid waste landfill leachate
landfill leachates and leachate sediments were investigated in order to survey the discharge of uranium (u) from municipal solid waste (msw) landfills and municipal solid waste incinerator (mswi) bottom ash landfills. concentrations of u in the leachates were as high as or higher than concentrations of cd, a metal more often discussed when considering the environmental effects of landfill leach...
متن کاملThermodynamics of Extraction of Zn2+ from Sulfuric Acid Media with a Mixture of Dehpa and Mehpa
Thermodynamics of extraction of Zn2+ from sulfuric acid media contacting to a mixture of DEHPA and MEHPA diluted with 80 wt% aromatic-aliphatic kerosene with a constant DEHPA to MEHPA ratio is investigated at different acidities, concentrations and temperatures. As a result, the extraction reaction is found to be endothermic with a zinc distribution factor that increases with increasing of the ...
متن کاملUranium Removal from Aqueous Solution Using Ion-Exchange Resin DOWEX® 2x8 in the Presence of Sulfate Anions
The current study was attributed to uranium (VI) ions adsorption using a anion exchanger resin, Dowex®2x8, in the presence of sulfate anions. Evaluation of operational parameters including contact time, pH, initial concentration of uranium ions, and presence of various anions (including phosphate, sulfate, chloride, fluoride, and nitrate) in the solution was assessed on sorption performance of ...
متن کاملUranium Extraction from Solid Waste as Nitrate Complex with D2EHPA, TOPO and their Synergistic Mixture
متن کامل
extraction and acetylation of purified trypsin from bovin pancreas and study of some its physico-chemical properties
آنزیم تریپسین در شرایط قلیایی ناپایدار می باشد .و فعالیت پروتئولیتیکی تریپسین منجربه خود هضمی آن در جایگاههای خاصی می گردد. بنابر این آنزیمی با ناپایداری بالا محسوب میگردد. در سالهای اخیر موفق شدند که با ایجاد تغیرات شیمیایی با اضافه کردن فلزات خاص ، کلسیم و یا عمل استیلاسیون منجر به افزایش پایداری آنزیم تریپسین گردند. مطالعات در حال حاضر نشان می دهد که تریپسین استیله شده فعالیت آنزیمی خود را ...
15 صفحه اولذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Minerals
سال: 2023
ISSN: ['2075-163X']
DOI: https://doi.org/10.3390/min13030405