Adsorption of strontium ions from aqueous solution using hydrous, amorphous MnO2–ZrO2 composite: a new inorganic ion exchanger

Ahmadi, Seyed Javad; Akbari, Neda; Shiri-Yekta, Zahra; Mashhadizadeh, Mohammad Hossein; Pourmatin, A

doi:10.1007/s10967-013-2852-9

Cited by 29 publications

(11 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The adsorption performance of the as-prepared MnSb sorbent for Sr and Co ions was also compared with that of other manganese oxides and antimony oxides reported as shown in Table 3 [3,10,16,18,28,39,47,48]. Compared to other sorbents in the list, the as-prepared MnSb material showed better Sr and Co adsorption capacity at a lower operation pH and extremely low equilibrium concentrations, which is necessary for the treatment of LLRWs.…”

Section: Single-component Adsorptionmentioning

confidence: 99%

“…A hydrous MnO 2 -TiO 2 solid solution with an amorphous structure, has a much greater affinity to Sr 2+ at pH=7 than the single oxides [9]. A hydrous MnO 2 -ZrO 2 composite could efficiently uptake Sr 2+ ions from aqueous solutions at lower pH values (pH = 4) [16,18,19]. Based on these former successful trials, it seems that the adsorption properties of MnO 2 can be improved by doping with acid-resistant oxides.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Removal of strontium(II) and cobalt(II) from acidic solution by manganese antimonate

Zhang

Wei

Zhao

et al. 2016

Chemical Engineering Journal

View full text Add to dashboard Cite

Section: Single-component Adsorptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Removal of strontium(II) and cobalt(II) from acidic solution by manganese antimonate

Zhang

Wei

Zhao

et al. 2016

Chemical Engineering Journal

View full text Add to dashboard Cite

“…Only Ca-alginate beads in a solution without competing cations produced a maximum K d of 1.6 × 10 3 mL/g (Song et al 2013). Zirconium dioxide, with up to 1.2 × 10 −2 M of calcium and 2.9 × 10 −3 M barium, and a hydrous amorphous MnO 2 -ZrO 2 composite with no competing cations had K d values of 4.8 × 10 3 mL/g and 3.0 × 10 3 mL/g, respectively (Inan and Nostar 2013;Ahmadi et al 2014). In summary, Sr 2+ sorption onto synthetic sorbents proved to be an order of magnitude or higher than natural sorbents, although measurements in the presence of greater than millimolar concentrations of Ca 2+ were equally lacking.…”

Section: Review Of Synthetic Sorbentsmentioning

confidence: 98%

Evaluating Solid Sorbents for Recycling Wash Waters Containing Strontium and Calcium

Oster

Kaminski

Jerden

et al. 2019

J. Hazard. Toxic Radioact. Waste

View full text Add to dashboard Cite

A system for rapid reduction of radioactive contamination and recycle of contaminated waters is called the Integrated Wash-Aid, Treatment, and Emergency Reuse System (IWATERS). First developed for cesium contaminations, IWATERS prescribes the use of salt and surfactant additives to decontaminate radionuclides from urban surfaces. The water is collected and recycled after passing through reactive filtration beds containing selective sorbents. To adapt the IWATERS for strontium contaminations, potential additives to enhance its decontamination from urban surfaces are identified. One possible additive is calcium (Ca 2+ ). However, its concentration can have a very strong detrimental effect on the ability of selective sorbents to remove strontium from spent wash water. We recognized that studies on off-the-shelf sorbents that include Ca 2+ concentrations at relevant levels (greater than millimolar) are absent in the literature. To understand better the effect of Ca 2+ , we completed a literature review, batch tests, and surface complexation modeling to reveal few sorbent options. Only silico-titanate sorbents exhibited high K d values in the presence of Ca 2+ , but have significant drawbacks in cost and availability. Given the state of the art, it is imperative that alternatives to alkaline earth ions in the IWATERS be identified to permit in situ recycle of the wash waters.

show abstract

“…6−8 MnO 2 particles have a large Sr 2+ sorption capacity, and they are selective for Sr 2+ in the presence of competing ions such as Na + , K + , Ca 2+ , and Mg 2+ . 6,9 In the present paper, the adsorption of Sr 2+ onto MnO 2 is highlighted. However, MnO 2 nanoparticles have drawbacks, such as a tendency to agglomerate because of van der Waals forces and other interactions.…”

Section: ■ Introductionmentioning

confidence: 95%

Synthesis of Metal–Organic Framework ZnO_x-MOF@MnO₂ Composites for Selective Removal of Strontium Ions from Aqueous Solutions

2020

View full text Add to dashboard Cite

A Zn(II)-based metal−organic framework (MOF) compound and MnO 2 were used to prepare ZnO x -MOF@MnO 2 composites for selective Sr 2+ removal in aqueous solutions. The ZnO x -MOF@MnO 2 composites were characterized by Fourier transform infrared spectroscopy, scanning electron microscopy, thermogravimetric analysis, and Brunauer−Emmett−Teller surface area analysis. The functional groups, morphologies, thermal stabilities, and specific surface areas of the composites were suitable for Sr 2+ adsorption. A maximum adsorption capacity of 147.094 mg g −1 was observed in batch adsorption experiments, and the sorption isotherms were fit well by the Freundlich model of multilayer adsorption. Adsorption reached equilibrium rapidly in kinetic experiments and followed the pseudo-secondorder kinetic model. The adsorption capacity of the ZnO x -MOF@MnO 2 composite with the highest MnO 2 content was high over a wide pH range, and the composite was highly selective toward Sr 2+ in solutions containing coexisting competing ions. Also, it has a good reusability for removing Sr 2+ .

show abstract

Adsorption of strontium ions from aqueous solution using hydrous, amorphous MnO2–ZrO2 composite: a new inorganic ion exchanger

Cited by 29 publications

References 38 publications

Removal of strontium(II) and cobalt(II) from acidic solution by manganese antimonate

Removal of strontium(II) and cobalt(II) from acidic solution by manganese antimonate

Evaluating Solid Sorbents for Recycling Wash Waters Containing Strontium and Calcium

Synthesis of Metal–Organic Framework ZnO_x-MOF@MnO₂ Composites for Selective Removal of Strontium Ions from Aqueous Solutions

Contact Info

Product

Resources

About

Adsorption of strontium ions from aqueous solution using hydrous, amorphous MnO2–ZrO2 composite: a new inorganic ion exchanger

Cited by 29 publications

References 38 publications

Removal of strontium(II) and cobalt(II) from acidic solution by manganese antimonate

Removal of strontium(II) and cobalt(II) from acidic solution by manganese antimonate

Evaluating Solid Sorbents for Recycling Wash Waters Containing Strontium and Calcium

Synthesis of Metal–Organic Framework ZnOx-MOF@MnO2 Composites for Selective Removal of Strontium Ions from Aqueous Solutions

Contact Info

Product

Resources

About

Synthesis of Metal–Organic Framework ZnO_x-MOF@MnO₂ Composites for Selective Removal of Strontium Ions from Aqueous Solutions