Phosphorylated polysaccharide derivatives as efficient separation agents for zinc and ferric oxides particles from water

Abstract Production of no carrier-added (NCA) 199Au through natPt(n, γ) reaction and subsequent purification using liquid-liquid extraction from other radioisotopes is studied in the context of theranostic application. Comparative separation of NCA 199Au after dissolution of activated Pt target using three Cyanex compounds (Cyanex-272, Cyanex-302 and Cyanex-923) is evaluated. The extraction process is optimized in terms of the type of extractant, the concentration of extractant, extraction time and aqueous media (HNO3, NH4OH). Among these extractants, the Cynaex-923 is efficient and promising for rapid separation and production of NCA 199Au from HNO3 by high extraction %. Selective extraction of 199Au from other Pt and Ir radioisotopes is observed. High recovery of 199Au was obtained in the case of Cyanex-923 using 0.05 M thiourea dissolved in HCl or 2 M NaOH. Our results find the Cyanex-923 as a promising extractant for efficient separation of 199Au from irradiated Pt target with high yield (99%).

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A facile development of superhydrophobic and superoleophilic micro-textured functionalized stainless-steel mesh membrane for fast and efficient separation of oil from water

Journal of Environmental Chemical Engineering ◽

10.1016/j.jece.2021.105825 ◽

2021 ◽

pp. 105825

Author(s):

Nadeem Baig ◽

Tawfik A. Saleh

Keyword(s):

Stainless Steel ◽

Stainless Steel Mesh ◽

Efficient Separation ◽

Steel Mesh

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Enhanced Photocatalytic Activity of Spherical Nd3+ Substituted ZnFe2O4 Nanoparticles

Materials ◽

10.3390/ma14082054 ◽

2021 ◽

Vol 14 (8) ◽

pp. 2054

Author(s):

Loan T. T. Nguyen ◽

Hang T. T. Nguyen ◽

Thieng H. Le ◽

Lan T. H. Nguyen ◽

Hai Q. Nguyen ◽

...

Keyword(s):

Grain Size ◽

Photocatalytic Activity ◽

Dye Removal ◽

Catalyst Loading ◽

Separation Mechanism ◽

Light Radiation ◽

Efficient Separation ◽

Oxidant Concentration ◽

Znfe2o4 Nanoparticles ◽

Removal Efficiencies

In this study, nanocrystalline ZnNdxFe2−xO4 ferrites with x = 0.0, 0.01, 0.03 and 0.05 were fabricated and used as a catalyst for dye removal potential. The effect of Nd3+ ions substitution on the structural, optical and photo-Fenton activity of ZnNdxFe2−xO4 has been investigated. The addition of Nd3+ ions caused a decrease in the grain size of ferrites, the reduction of the optical bandgap energies and thus could be well exploited for the catalytic study. The photocatalytic activity of the ferrite samples was evaluated by the degradation of Rhodamine B (RhB) in the presence of H2O2 under visible light radiation. The results indicated that the ZnNdxFe2−xO4 samples exhibited higher removal efficiencies than the pure ZnFe2O4 ferrites. The highest degradation efficiency was 98.00%, attained after 210 min using the ZnNd0.03Fe1.97O4 sample. The enhanced photocatalytic activity of the ZnFe2O4 doped with Nd3+ is explained due to the efficient separation mechanism of photoinduced electron and holes. The effect of various factors (H2O2 oxidant concentration and catalyst loading) on the degradation of RhB dye was clarified.

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