Phosphoryl functionalized mesoporous silica for uranium adsorption

Guo, Xue; Yu, Feng; Ma, Li; Gao, Dingsan; Jing, Jie; Yu, Jincheng; Sun, Haibin; Gong, Hongyu; Zhang, Yujun

doi:10.1016/j.apsusc.2017.01.050

Cited by 163 publications

(29 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Also, wellordered structure constituted by uniform channels along to pores axes was clearly observed, Figure 9(b). Those properties characteristic of 2-D hexagonal symmetry (p6mm) were in full agreement with corresponding structural characterization of SBA-15 materials as presented in previous works (Guo et al, 2017;Zhu et al, 2013;Azimov et al, 2012). Those results suggested that titania phases could be incorporated within the siliceous mesostructured network (Yang et al, 2009).…”

Section: High-resolution Tem (Hr-tem) and High Angle Annular Dark Field-stem (Haadf-stem)supporting

confidence: 90%

Improving platinum dispersion on SBA-15 by titania addition

Morales-Hernández¹,

Ujat²,

Pacheco-Sosa³

et al. 2019

Rev.Mex.Ing.Quim.

View full text Add to dashboard Cite

show abstract

Section: High-resolution Tem (Hr-tem) and High Angle Annular Dark Field-stem (Haadf-stem)supporting

confidence: 90%

Improving platinum dispersion on SBA-15 by titania addition

Morales-Hernández¹,

Ujat²,

Pacheco-Sosa³

et al. 2019

Rev.Mex.Ing.Quim.

View full text Add to dashboard Cite

show abstract

“…The presented information points to the urgent need of technologies that are effective for uranium removal or to prevent the release of toxic concentrations of uranium into the environment (Ghasemi Torkabad et al 2017). Common techniques used for heavy metal extraction include membrane processes, ion exchange, adsorption, precipitation, and solvent extraction (Chen et al 2017;Xue et al 2017;Sarafraz et al 2017). As a low-cost, easily applicable alternative, adsorption has been considered promising for the removal of U(VI) from aqueous solutions (Su et al 2018).…”

Section: Introductionmentioning

confidence: 99%

“…Due to the high affinity of phosphoryl groups to uranium (Zhou et al 2015), phosphorylated materials such as lignin (Bykov and Ershov 2009), pine wood sawdust (Zhou et al 2015), graphene oxide (Liu et al 2015b;Chen et al 2017), carbon spheres (Yu et al 2014), chitosan (Sakaguchi et al 1981;Morsy 2015), cactus fibers (Prodromou and Pashalidis 2013), polyethylene (Shao et al 2017), zirconium (Um et al 2007), and mesoporous silica (Sarafraz et al 2017;Xue et al 2017), have been demonstrated for uranium removal. Phosphorous-based functional groups act as chelating agents and thus favor binding of uranyl species (Xie et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Phosphorylated cellulose nanofibers exhibit exceptional capacity for uranium capture

et al. 2020

View full text Add to dashboard Cite

We investigate the adsorption of hexavalent uranium, U(VI), on phosphorylated cellulose nanofibers (PHO-CNF) and compare the results with those for native and TEMPO-oxidized nanocelluloses. Batch adsorption experiments in aqueous media show that PHO-CNF is highly efficient in removing U(VI) in the pH range between 3 and 6. Gelling of nanofiber hydrogels is observed at U(VI) concentration of 500 mg/L. Structural changes in the nanofiber network (scanning and transmission electron microscopies) and the surface chemical composition (X-ray photoelectron spectroscopy) gave insights on the mechanism of adsorption. The results from batch adsorption experiments are fitted to Langmuir, Freundlich, and Sips isotherm models, which indicate a maximum adsorption capacity of 1550 mg/g, the highest value reported so far for any bioadsorbent. Compared to other metals (Zn, Mn, and Cu) and typical ions present in natural aqueous matrices the phosphorylated nanofibers are shown to be remarkably selective to U(VI). The results suggest a solution for the capture of uranium, which is of interest given its health and toxic impacts when present in aqueous matrices.

show abstract

“…synthesized phosphoryl functionalized MS (TBP-SBA-15) by modifying MS with tributyl phosphate (TBP) and NH 2 -SBA-15 with γ-aminopropyl triethoxy silane. Their results revealed that the uranium qe was enhanced from the 140 mg/g to 200 mg/g for TBP-SBA-15 and 190 mg/g for NH 2 -SBA-15 12 . Chamila Gunathilake et al .…”

Section: Introductionmentioning

confidence: 99%

Economic and Efficient phosphonic functional groups mesoporous silica for uranium selective adsorption from aqueous solutions

Sarafraz

Alahyarizadeh

Minuchehr

et al. 2019

Sci Rep

View full text Add to dashboard Cite

A novel mesoporous silica with enhanced phosphonic functional groups (PFGs) and without any silane agents was provided by Sol-Gel technique for selective adsorption of U(VI) from aqueous solutions (AqS). The absorbent was synthesized based on the achieving the four best performance characteristics including availability, economically, adsorption efficiency, and selectivity which are undoubtedly defined the usefulness of the adsorbents. The sorption results exhibited the highest uranium adsorption capacity, qe, of 820.7 mg/g at pH ≈ 8 which indicated the adsorbent is the best alternative for uranium adsorption from the nearly neutral solutions such as seawater. The recovery percentages by the adsorbent in the aqueous environments involving other elements such as Mg, Cd, Hg, As, Ca, Na, Ni and the salty environment with high concentration of Cl − ions are indicated that the adsorbent presents the acceptable selectivity for uranium adsorption from the AqS such as industrial wastewater. Several activities and factors including removing the silane agents, using sodium metasilicate as an available and low-cost source of silica, and using the Sol-gel method as an unexpansive synthesis technique caused to reduce the synthesis costs from 222.787 EUR/kg for the template method to 60.078 EUR/kg for Sol-gel method which confirm the synthesis of a cost-effective adsorbent.

show abstract

Phosphoryl functionalized mesoporous silica for uranium adsorption

Cited by 163 publications

References 35 publications

Improving platinum dispersion on SBA-15 by titania addition

Improving platinum dispersion on SBA-15 by titania addition

Phosphorylated cellulose nanofibers exhibit exceptional capacity for uranium capture

Economic and Efficient phosphonic functional groups mesoporous silica for uranium selective adsorption from aqueous solutions

Contact Info

Product

Resources

About