کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5453791 1514150 2017 26 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Tungsten substituted molybdophosphoric acid loaded on various types of mesoporous silica SBA-15 for application of thorium ion adsorption
موضوعات مرتبط
مهندسی و علوم پایه مهندسی انرژی انرژی هسته ای و مهندسی
پیش نمایش صفحه اول مقاله
Tungsten substituted molybdophosphoric acid loaded on various types of mesoporous silica SBA-15 for application of thorium ion adsorption
چکیده انگلیسی
In this research, three type of mesoporous silica with different morphologies, namely fibers, spheres and platelets were synthesized and used as a support for immobilization of [H3PMo6W6O40].nH2O. The samples were then applied as an inorganic composite ion-exchanger for sorption of thorium from aqueous solution. Various techniques including ICP, XRD, BET, SEM and FT-IR methods were used to characterize of the products. The experiment results showed that the [H3PMo6W6O40].nH2O supported on the platelet mesoporous silica exhibited both the highest sorption capacity and fastest kinetics when compared with the fibers and spheres adsorbents. Our results show that the morphology of the mesoporous support, which can produce different channel lengths, pore size and surface area, has a serious effect on the sorption properties and influences: (1) the amount of loading of heteropoly acid in the support (2) the kinetic of the sorption process and (3) the maximum of adsorption capacity. The platelet morphology showed the shortest equilibrium time, the highest loading amount and the highest adsorption capacity therefore delivering the best performance among the three morphologies.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Nuclear Materials - Volume 496, 1 December 2017, Pages 207-214
نویسندگان
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