Selective separation and concentration of Pd(II) from Fe(III), Co(II), Ni(II), and Cu(II) ions using thiourea‐formaldehyde resin

Muslu, Nazan; Gülfen, Mustafa

doi:10.1002/app.33509

Cited by 32 publications

(19 citation statements)

References 44 publications

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“…The titration curve exhibited two end points as pH 3.33 and 8.47 (Figure ). At pH 2 and 4, PdCl 4 2– and PdCl 3 – anionic complexes are the predominant species and high Pd(II) adsorption values were obtained (Figure )

R  NH  R + H^{+} + {Cl}^{-} \to R - {NH}_{2}^{+} - R + {Cl}^{-} true(Protonation true)

R  COOH + H^{+} + {Cl}^{-} \to R - {COOH}_{2}^{+} + {Cl}^{-} true(Protonation true)

true({normalR}_{2} true) {NH}_{2}^{+} + {PdCl}_{4}^{2 -} \to true({normalR}_{2} true) {NH}_{2}^{+} {PdCl}_{4}^{2 -} true(Ionic interaction true)

R  {COOH}_{2}^{+} + {PdCl}_{4}^{2 -} \to R  {COOH}_{2}^{+} {PdCl}_{4}^{2 -} true(Ionic interaction true)

true({normalR}_{2} true) {NH}_{2}^{+} + ...

…”

Section: Resultsmentioning

confidence: 99%

“…In the adsorption of Pd(II) ions, ion exchange resins, chelating polymers, bioadsorbents, and activate carbon are used mostly. Chelating polymers are more preferable adsorbents in the adsorption of Pd(II) ions because of selectivity .…”

Section: Introductionmentioning

confidence: 99%

“…Chelating polymers containing N donor atoms exhibited a stable complex formation tendency with Pd(II) at specific pH area . In other words, amine functional groups are known as good coordinating groups for Pd(II) ions . The adsorption of Pd(II) ions has been studied by some researchers using the chelating polymers with amine functional groups.…”

Section: Introductionmentioning

confidence: 99%

“…The adsorption of Pd(II) ions has been studied by some researchers using the chelating polymers with amine functional groups. The some examples of these polymers are melamine–formaldehyde–thiourea, thiourea/urea–formaldehyde, aminated lignin derivatives, amine functionalized ion exchanges, imidazole containing resin, and polyamine functionalized polystyrene …”

Section: Introductionmentioning

confidence: 99%

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Equilibrium, kinetics, and thermodynamics of Pd(II) adsorption onto poly(m‐aminobenzoic acid) chelating polymer

Mildan

Gülfen

2015

J of Applied Polymer Sci

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This study describes the equilibrium, kinetics, and thermodynamics of the palladium(II) (Pd(II)) adsorption onto poly(m-aminobenzoic acid) (p-mABA) chelating polymer. The p-mABA was synthesized by the oxidation reaction of maminobenzoic acid monomer with ammonium peroxydisulfate (APS). The synthesized p-mABA chelating polymer was characterized by FTIR spectroscopy, gel permeation chromatography (GPC), thermal analysis, potentiometric titration, and scanning electron microscopy (SEM) analysis methods. The effects of the acidity, temperature, and initial Pd(II) concentration on the adsorption were examined by using batch adsorption technique. The optimum acidity for the Pd(II) adsorption was determined as pH 2. In the equilibrium studies, it was found that the Pd(II) adsorption capacity of the polymer was to be 24.21 mg/g and the adsorption data fitted better to the Langmuir isotherm than the Freundlich isotherm. The kinetics of the adsorption fitted to pseudo-second-order kinetic model. In the thermodynamic evaluation of the adsorption, the DG8 values were calculated as 216.98 and 222.26 kJ/mol at 25-558C temperatures. The enthalpy (DH8), entropy (DS8), and the activation energy (E a ) were found as 35.40 kJ/mol, 176.05 J/mol K, and 61.71 kJ/mol, respectively. The adsorption of Pd(II) ions onto p-mABA was a spontaneous, endothermic, and chemical adsorption process which is governed by both ionic interaction and chelating mechanisms.Poly(m-aminobenzoic acid) is a poly(aniline) derivative polymer, which is also named poly(aniline-3-carboxylic acid).

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R  NH  R + H^{+} + {Cl}^{-} \to R - {NH}_{2}^{+} - R + {Cl}^{-} true(Protonation true)

R  COOH + H^{+} + {Cl}^{-} \to R - {COOH}_{2}^{+} + {Cl}^{-} true(Protonation true)

true({normalR}_{2} true) {NH}_{2}^{+} + {PdCl}_{4}^{2 -} \to true({normalR}_{2} true) {NH}_{2}^{+} {PdCl}_{4}^{2 -} true(Ionic interaction true)

R  {COOH}_{2}^{+} + {PdCl}_{4}^{2 -} \to R  {COOH}_{2}^{+} {PdCl}_{4}^{2 -} true(Ionic interaction true)

true({normalR}_{2} true) {NH}_{2}^{+} + ...

…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Equilibrium, kinetics, and thermodynamics of Pd(II) adsorption onto poly(m‐aminobenzoic acid) chelating polymer

Mildan

Gülfen

2015

J of Applied Polymer Sci

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“…A practical and desirable solution to the recycling would be a highly-selective separation process employing heterogeneous adsorbents. There have been many reports on the recovery methods of palladium based on heterogeneous adsorbents 2 that involve functional resins with chelate sites, [3][4][5][6] graed brous polymers 7,8 and natural polymers such as chitosan and tannin gels. 9,10 In general, improvement of the adsorption ability was based on introducing chelate sites, such as high molecular weight amines, aminobenzoic acid, phosphines, sulphides and thiourea onto the adsorbents.…”

Section: Introductionmentioning

confidence: 99%

Theophylline-bearing microspheres with dual features as a coordinative adsorbent and catalytic support for palladium ions

et al. 2018

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Study on pretreatment method for measurement of Fe-55 and Ni-63 in leaching solution of hardened cement

Dai

Liu

et al. 2022

J Radioanal Nucl Chem

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Selective separation and concentration of Pd(II) from Fe(III), Co(II), Ni(II), and Cu(II) ions using thiourea‐formaldehyde resin

Cited by 32 publications

References 44 publications

Equilibrium, kinetics, and thermodynamics of Pd(II) adsorption onto poly(m‐aminobenzoic acid) chelating polymer

Equilibrium, kinetics, and thermodynamics of Pd(II) adsorption onto poly(m‐aminobenzoic acid) chelating polymer

Theophylline-bearing microspheres with dual features as a coordinative adsorbent and catalytic support for palladium ions

Study on pretreatment method for measurement of Fe-55 and Ni-63 in leaching solution of hardened cement

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