Phosphate-Based Ultrahigh Molecular Weight Polyethylene Fibers for Efficient Removal of Uranium from Carbonate Solution Containing Fluoride Ions

Autor: Maojiang Zhang, Yuna Li, Hongjuan Ma, Rong Li, Zhe Xing, Guozhong Wu
Jazyk: angličtina
Rok vydání: 2018
Předmět:
Glycidyl methacrylate
removal of uranium from carbonate solution
Carbonates
Pharmaceutical Science
chemistry.chemical_element
02 engineering and technology
010402 general chemistry
01 natural sciences
Article
Phosphates
Analytical Chemistry
lcsh:QD241-441
Fluorides
symbols.namesake
chemistry.chemical_compound
Adsorption
ultrahigh molecular weight polyethylene fibers
radiation induced graft polymerization
glycidyl methacrylate
phosphate group
lcsh:Organic chemistry
Spectroscopy
Fourier Transform Infrared
Drug Discovery
Physical and Theoretical Chemistry
Phosphoric acid
Photoelectron Spectroscopy
Organic Chemistry
Langmuir adsorption model
Uranium
021001 nanoscience & nanotechnology
Phosphate
0104 chemical sciences
Molecular Weight
Solutions
Kinetics
chemistry
Chemistry (miscellaneous)
symbols
Molecular Medicine
Carbonate
Polyethylenes
0210 nano-technology
Fluoride
Nuclear chemistry
Zdroj: Molecules; Volume 23; Issue 6; Pages: 1245
Molecules, Vol 23, Iss 6, p 1245 (2018)
Molecules : A Journal of Synthetic Chemistry and Natural Product Chemistry
ISSN: 1420-3049
DOI: 10.3390/molecules23061245
Popis: This work provides a cost-effective approach for preparing functional polymeric fibers used for removing uranium (U(VI)) from carbonate solution containing NaF. Phosphate-based ultrahigh molecular weight polyethylene (UHMWPE-g-PO4) fibers were developed by grafting of glycidyl methacrylate, and ring-opening reaction using phosphoric acid. Uranium (U(VI)) adsorption capacity of UHMWPE-g-PO4 fibers was dependent on the density of phosphate groups (DPO, mmol∙g−1). UHMWPE-g-PO4 fibers with a DPO of 2.01 mmol∙g−1 removed 99.5% of U(VI) from a Na2CO3 solution without the presence of NaF. In addition, when NaF concentration was 3 g∙L−1, 150 times larger than that of U(VI), the U(VI) removal ratio was still able to reach 92%. The adsorption process was proved to follow pseudo-second-order kinetics and Langmuir isotherm model. The experimental maximum U(VI) adsorption capacity (Qmax) of UHMWPE-g-PO4 fibers reached 110.7 mg∙g−1, which is close to the calculated Qmax (117.1 mg∙g−1) by Langmuir equation. Compared to F−, Cl−, NO3−, and SO42− did not influence U(VI) removal ratio, but, H2PO4− and CO32− significantly reduced U(VI) removal ratio in the order of F− > H2PO4− > CO32−. Cyclic U(VI) sorption-desorption tests suggested that UHMWPE-g-PO4 fibers were reusable. These results support that UHMWPE-g-PO4 fibers can efficiently remove U(VI) from carbonate solutions containing NaF.
Databáze: OpenAIRE
Externí odkaz:
Nepřihlášeným uživatelům se plný text nezobrazuje