The removal of some rare earth elements from their aqueous solutions on by-pass cement dust (BCD)

Ali, Omnia; Osman, Hussien H.; Sayed, S.A.; Shalabí, M. E. H.

doi:10.1016/j.jhazmat.2011.08.014

Cited by 45 publications

(15 citation statements)

References 30 publications

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“…On the other hand, the increase in the driving force of samarium(III) ions towards the adsorption sites on the adsorbent was responsible for the higher ad- sorption capacity achieved at higher initial concentration. Similar observations have been reported for other metal ions onto various adsorbents [24][25][26][27].…”

Section: Effect Of Samarium(iii) Initial Concentrationsupporting

confidence: 89%

Adsorption behavior of samarium(III) from aqueous solutions onto PAN@SDS core-shell polymeric adsorbent

2015

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Adsorption behavior of samarium(III) radionuclides from aqueous solutions onto a novel polyacrylonitrile coated with sodium dodecyl sulfate (PAN@SDS), prepared by gamma radiation-induced polymerization, was studied in this work. The developed polymeric adsorbent was characterized by FT-IR, X-ray diffraction and N 2 adsorption-desorption. The influence of some experimental parameters such as pH, initial samarium(III) concentration, SDS concentration, temperature, ionic strength and contact time on the adsorption efficiency of samarium(III) was evaluated. Results showed that adsorption efficiency of about 97% was attained for samarium (III) in the pH range 3.8-7.5. The kinetic study showed that samarium(III) was efficiently removed within 10 min and equilibrium was attained at around 30 min. Six isotherm models; Freundlich, Langmuir, Generalized, RedlichPeterson, Toth and Sips, were used to fit the adsorption equilibrium data, and the best-fit three-parameter isotherms suggest that adsorption capacity of PAN@SDS for samarium(III) to be 97.73 mg g −1 , which is a markedly high value compared to most of the other adsorbents reported for other metal ions. Using the Dubinin-KaganerRadushkevich (DKR) model, the mean free energy was calculated as 1.569 kJ mol-1, which suggested that adsorption of samarium(III) was dominated by physisorption. Results of the thermodynamic parameters, G o , S o and H o , showed that adsorption of samarium(III) onto PAN@SDS was feasible, spontaneous and exothermic in nature. Of the various studied kinetic models, the experimental kinetic data were best fitted to the modified multiplex model, and the adsorption process was mainly controlled by particle diffusion. Desorption studies showed that 95% of samarium(III) loaded on PAN@SDS were recovered using 2 mol L −1 HCl.

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Section: Effect Of Samarium(iii) Initial Concentrationsupporting

confidence: 89%

Adsorption behavior of samarium(III) from aqueous solutions onto PAN@SDS core-shell polymeric adsorbent

2015

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“…[8][9][10][11][12] Ln are present in natural objects in small quantities, so often the preliminary treatment of samples is applied for their determination, which in particular includes preconcentration, separation, and exclusion. [13][14][15][16] The sufficient number of highly sensitive and selective methods of analysis for the detection and quantitative determination of Ln is not available. Among the available methods the sorption should be highlighted due to its simplicity, high efficiency, and low cost.…”

Section: Introductionmentioning

confidence: 99%

Preconcentration of Lutetium from Aqueous Solution by Transcarpathian Clinoptilolite

Stechynska

Vasylechko

Gryshchouk

et al. 2020

ACSi

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Sorptive properties of Transcarpathian clinoptilolite towards trace amounts of Lu(III) were studied under dynamic conditions. It is shown that this lanthanide is sorbed from the weakly alkaline solution (рН 10) most efficiently. The sorption capacity of clinoptilolite under the optimal conditions is equal to 9.37 mg g-1. The distribution of various species of Lu(III) in aqueous solutions at various total concentration of the lanthanide in the pH range from 4 to 13 was calculated. The best desorbent of Lu(III) is the 1 mol L-1 solution of NaCl, preacidified with the solution of HCl to a value of рН 4.0. This desorbent enables 95-100% of Lu(ІІІ) removal. The method of Lu(III) trace amounts preconcentration from aqueous samples in a solid phase extraction mode with the further determination of this rare earth element via the spectrophotometric method using arsenazo III was developed. The linearity of the proposed method was observed in the range of 1-12 ng mL-1 with the detection limit of 0.4 ng mL-1 .

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“…The notorious itai-itai disease occurring in Japan during the 1960s and 1970s is one of the most famous accidents caused by chronic cadmium contaminated rice fields [5]. In recent decades, however, rare earth elements (REEs) were also widely exploited and used in industrial and high-tech fields as a result of their irreplaceable roles in designing magnetic, luminescent, catalytic, hydrogen storage, and superconductive materials [6][7][8]. More and more rare earth elements would inevitably enter into the environmental waters and work places, thus causing adverse health effects [9].…”

Section: Introductionmentioning

confidence: 99%

Enhanced Potential Toxic Metal Removal Using a Novel Hierarchical SiO2–Mg(OH)2 Nanocomposite Derived from Sepiolite

Yao

Zhao

et al. 2019

Minerals

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Clays are widely used as sorbents for heavy metals due to their high specific surface areas, low cost, and ubiquitous occurrence in most soil and sediment environments. However, the low loading capacity for heavy metals is one of their inherent limitations. In this work, a novel SiO2–Mg(OH)2 nanocomposite was successfully prepared via sequential acid–base modification of raw sepiolite. The structural characteristics of the resulting modified samples were characterized by a wide range of techniques including field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), energy dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), and nitrogen physisorption analysis. The results show that a hierarchical nanocomposite constructed by loading the Mg(OH)2 nanosheets onto amorphous SiO2 nanotubes can be successfully prepared, and the nanocomposite has a high surface area (377.3 m2/g) and pore volume (0.96 cm3/g). Batch removal experiments indicate that the nanocomposite exhibits high removal efficiency toward Gd(III), Pb(II), and Cd(II), and their removal capacities were greatly enhanced in comparison with raw sepiolite, due to the synergistic effect of the different components in the hierarchical nanocomposite. This work can provide a novel route toward a hierarchical nanocomposite by using clay minerals as raw material. Taking into account the simplicity of the fabrication route and the high loading capacities for heavy metals, the developed nanocomposite also has great potential applications in water treatment.

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The removal of some rare earth elements from their aqueous solutions on by-pass cement dust (BCD)

Cited by 45 publications

References 30 publications

Adsorption behavior of samarium(III) from aqueous solutions onto PAN@SDS core-shell polymeric adsorbent

Adsorption behavior of samarium(III) from aqueous solutions onto PAN@SDS core-shell polymeric adsorbent

Preconcentration of Lutetium from Aqueous Solution by Transcarpathian Clinoptilolite

Enhanced Potential Toxic Metal Removal Using a Novel Hierarchical SiO2–Mg(OH)2 Nanocomposite Derived from Sepiolite

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