Amberlite XAD-1180 impregnation with Cyphos IL101 for the selective recovery of precious metals from HCl solutions

Navarro, Ricardo García; Lira, Miguel Angel; Saucedo, I.; Alatorre, Alejandro; Guibal, Eric

doi:10.1007/s13404-016-0190-8

Cited by 17 publications

(16 citation statements)

References 70 publications

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“…Argekar and Shetty [ 54 ] used Cyanex 302 for the solvent extraction of Pb(II) and 0.1 M HNO 3 solutions for metal stripping from loaded organic phases. Thiourea in HCl solutions have also been frequently used for the stripping of metal ions (especially noble metals [ 57 , 58 , 59 ]) from loaded organic phases for the desorption of metal ions from impregnated resins and sorbents: 1 M thiourea in 1 M HCl solution was also carried out. Table 5 reports the results for Pb(II) desorption from selected metal-loaded sorbents (i.e., C301-M-25, C302-M-50, and C302-N-75).…”

Section: Resultsmentioning

confidence: 99%

Extractant Immobilization in Alginate Capsules (Matrix- and Mononuclear-Type): Application to Pb(II) Sorption from HCl Solutions

et al. 2017

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The decontamination of dilute industrial effluents is a critical challenge for decreasing the environmental impact of mining and metallurgical activities. As an alternative to conventional processes, new extractant impregnated resins (EIRs) have been synthesized by the immobilization of Cyanex 301 and Cyanex 302 in alginate capsules using two different procedures (matrix-type immobilization vs. mononuclear encapsulation). These materials have been tested for Pb(II) sorption from acidic solutions. The Langmuir equation fitted well the sorption isotherms and the maximum sorption capacities vary between 24 and 80 mg·g−1 at pH 1, depending on the type and loading of the extractant in the EIR. Uptake kinetics were controlled by the resistance to intraparticle diffusion; though both the Crank equation (intraparticle diffusion) and pseudo-second order rate equation equally fitted uptake profiles. The amount of extractant immobilized in mononuclear capsules is lower than in matrix-type beads; this leads to lower sorption capacities but slightly better mass transfer properties. The balance between the advantages and drawbacks of the different systems makes more promising matrix-type capsules. The desorption of Pb(II) is possible using 1 M HNO3 solutions: metal ions were completely desorbed. However, the probable oxidation of the extractants (conversion to oxidized forms more sensitive to pH) reduces the sorption efficiency when they are re-used.

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Section: Resultsmentioning

confidence: 99%

Extractant Immobilization in Alginate Capsules (Matrix- and Mononuclear-Type): Application to Pb(II) Sorption from HCl Solutions

et al. 2017

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“…The authors employ the dry impregnation method, just like before; however, they do not address possible leakage of the IL. [214] An imidazolium TSIL attached to polystyrene beads proved to be an efficient and selective extraction medium for Pt II , Pt IV , and Pd II from synthetic solutions, of environmentally friendly and industrially relevant character. FTIR data of the beads verify the presence of the IL, which is not modified after heating of the solid material up to 60 °C, thus, implying the thermal stability of the synthesized imidazolium-based TSIL on chloromethylated polystyrene beads (CP-AMIN).…”

Section: Solid-supported Ionic Liquids As Novel Resinsmentioning

confidence: 99%

“…The recyclability of the sorbent was demonstrated for five sorption and desorption cycles, for Au only, while rinsing in between desorption cycles was necessary to remove residual thiourea (used for Au stripping in this case). The authors employ the dry impregnation method, just like before; however, they do not address possible leakage of the IL [214] …”

Section: Ionic Liquids In Solid‐liquid Separationsmentioning

confidence: 99%

Liquid‐ and Solid‐based Separations Employing Ionic Liquids for the Recovery of Platinum Group Metals Typically Encountered in Catalytic Converters: A Review

et al. 2022

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The wide application range and ascending demand for platinum group metals combined with the progressive depletion of their natural resources renders their efficient recycling a very important and pressing matter. Primarily environmental considerations associated with state‐of‐the‐art recovery processes have shifted the focus of the scientific community toward the investigation of alternative recycling approaches. Within this context, ionic liquids have gained considerable attention in the last two decades chiefly sparked by properties such as tunabilty, low‐volatility, and relatively easy recyclability. In this review an understanding of the state‐of‐the‐art processes, including their drawbacks and limitations, is provided. The core of the discussion is focused on platinum group metal recovery with ionic liquid‐based systems. A brief insight in some environmental considerations related to ionic liquids is also provided while some discussion on research gaps, common misconceptions related to ionic liquids and outlook on unresolved issues could not be absent from this review.

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“…The immobilization on polymer supports was performed both in the case of commercial ILs as well as newly designed compounds, although in the first group, mainly impregnation was used. An example is the immobilization of Cyphos IL-101 (tetradecyl(trihexyl)phosphonium chloride) onto Amberlite XAD series sorbents and Pd(II), Fe(III), Hg(II), Au(III), and Pt(IV) sorption from HCl [ 22 , 23 , 24 , 25 ]. Our previous studies also confirmed that the functionalization of PS-DVB by the incorporation and encapsulation of ionic liquid extractant [ 26 , 27 ] or by quaternization with IL-precursors to obtain the IL-functionalized polymers enabled us to obtain efficient sorbents [ 13 , 28 ].…”

Section: Introductionmentioning

confidence: 99%

Novel Polymer Sorbents with Imprinted Task-Specific Ionic Liquids for Metal Removal

et al. 2021

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In this paper, the potential of novel polymer sorbents with the imprinted IL-functional group for the removal of Cu(II), Cd(II), and Zn(II) from aqueous solutions was investigated by batch mode. The sorbents were fabricated by direct reaction of the prepared polymer matrix (poly(vinylbenzyl chloride-divinylbenzene), VBC, and poly(vinylbenzyl bromide-divinylbenzene), VBBr) with 1-(3- or 4-pyridyl)undecan-1-one and oxime of 1-(3- or 4-pyridyl)undecan-1-one. The Fourier Transform Infrared Spectroscopy (FT-IR), Raman Spectroscopy (Raman), Thermogravimetric Analysis (TG), Differential Scanning Calorimetry (DSC), and Scanning Electron Microscopy (SEM) techniques were used to show functionality and stability of the sorbents. The materials were also characterized by contact-angle goniometry, X-rayphotoelectron spectroscopy (XPS), and Zeta potential analysis. The removal of Cd(II), Cu(II), and Zn(II) was monitored and optimized under the influence of several operational controlling conditions and factors such as pH, shaking time, temperature, initial metal ions concentration, and counter-ions at the functional group. The results obtained confirmed the very high potential of the sorbents; however, the properties depend on the structure of the functional group. The tested sorbents showed fast kinetics, significant capacity at 25 °C (84 mg/g for the Zn(II) sorption with VBC-Ox4.10, 63 mg/g for the Cd(II) sorption with VBBr-Ox3.10, and 69 mg/g for the Cu(II) sorption with VBC-K3.10), and temperature dependence (even 100% increase in capacity values at 45 °C). The selected sorbent can be regenerated without a significant decrease in the metal removal efficiency.

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Amberlite XAD-1180 impregnation with Cyphos IL101 for the selective recovery of precious metals from HCl solutions

Cited by 17 publications

References 70 publications

Extractant Immobilization in Alginate Capsules (Matrix- and Mononuclear-Type): Application to Pb(II) Sorption from HCl Solutions

Extractant Immobilization in Alginate Capsules (Matrix- and Mononuclear-Type): Application to Pb(II) Sorption from HCl Solutions

Liquid‐ and Solid‐based Separations Employing Ionic Liquids for the Recovery of Platinum Group Metals Typically Encountered in Catalytic Converters: A Review

Novel Polymer Sorbents with Imprinted Task-Specific Ionic Liquids for Metal Removal

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