Kinetic studies of the removal of Pt(IV) chloride complex ions from acidic aqueous solutions using activated carbon

Wojnicki, Marek; Socha, Robert P.; Fitzner, K.

doi:10.1007/s11144-017-1151-9

Cited by 11 publications

(10 citation statements)

References 38 publications

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“…This model was previously applied to describe the process of Pd(II) adsorption on NORIT ROX 0.8 [14] as well as Pt(IV) on Organosorb 10 CO 8×30 carbons [17].…”

Section: Kinetic Curve Analysismentioning

confidence: 99%

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Spectrophotometric Analysis of the Kinetic of Pd(II) Chloride Complex Ions Sorption Process from Diluted Aqua Solutions Using Commercially Available Activated Carbon

Wojnicki

2017

Archives of Metallurgy and Materials

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In this paper, results of adsorption kinetic studies of Pd(II) chloride complex ions on activated carbon Organosrob 10 CO are presented. Spectorphotometrical method was applied to investigate the process. Kinetic model was proposed, and fundamental thermodynamic parameters were determined. Proposed kinetic model describes well observed phenomenon in the studied range of concentration of Pd(II) chloride complex ions as well, as concentration of activated carbon.

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“…This model was previously applied to describe the process of Pd(II) adsorption on NORIT ROX 0.8 [14] as well as Pt(IV) on Organosorb 10 CO 8×30 carbons [17].…”

Section: Kinetic Curve Analysismentioning

confidence: 99%

“…Phenomenon of adsorption of metal ions on activated carbons is well known and was described in many papers [12][13][14][15][16][17][18]. However, due to the variety of activated carbon there is no consistent kinetic model with can be applied to describe this process.…”

Section: Introductionmentioning

confidence: 99%

Spectrophotometric Analysis of the Kinetic of Pd(II) Chloride Complex Ions Sorption Process from Diluted Aqua Solutions Using Commercially Available Activated Carbon

Wojnicki

2017

Archives of Metallurgy and Materials

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“…Among metals, platinum is important due to many potential applications in catalysis [ 1 ], modern chemistry, medicine [ 2 ], and engineering. For platinum recovery, several techniques can be used such as extraction [ 3 ], leaching [ 4 ], sorption [ 5 ], precipitation [ 6 ], chemical reduction, and biological methods [ 7 ]. However, despite the high level of recovery, the methods mentioned above do not guarantee environmentally friendly waste.…”

Section: Introductionmentioning

confidence: 99%

On the Rate of Interaction of Sodium Borohydride with Platinum (IV) Chloride Complexes in Alkaline Media

2021

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In this work, sodium borohydride was used as a strong reductant of traces of platinum complex ions. The investigations of the kinetics of redox reaction between platinum(IV) chloride complex ions and sodium borohydride were carried out. For the first time, the kinetic experiments were carried out in a basic medium (pH~13), which prevents NaBH4 from decomposition and suppresses the release of hydrogen to the environment. The rate constants of Pt(IV) reduction to Pt(II) ions under different temperatures and concentrations of chloride ions conditions were determined. In alkaline solution (pH~13), the values of enthalpy and entropy of activation are 29.6 kJ/mol and –131 J/mol K. It was also found that oxygen dissolved in the solution strongly affects kinetics of the reduction process. Using collected results, the reduction mechanism was suggested. For the first time, the appearance of diborane as an intermediate product during Pt(IV) ions reduction was suggested. Moreover, the influence of oxygen present in the reacting solution on the rate of reduction reaction was also shown.

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“…Platinum metal is one of expensive metals among the platinum group metals [1]. It is used in many industrial areas such as automotive catalysts, pharmaceuticals, electronics, medical devices, fuel cells, jewelry, telecommunication, petroleum and chemical industries.…”

Section: Introductionmentioning

confidence: 99%

“…There are many adsorbents for the recovery of Pt(IV) or Pt(II) ions from leach or waste solutions. Activated carbon [1,[7][8][9], silica [10,11], ion exchangers [6], impregnate resins [12] chelating polymers [13,14], biomass or natural polymers [15][16][17] have been used by different researchers. Adsorption methods are favorable in case of reusable adsorbents [18][19][20][21][22][23][24][25][26].…”

Section: Introductionmentioning

confidence: 99%

Sorption of Pt(IV) ions on poly(m-aminobenzoic acid) chelating polymer: Equilibrium, kinetic and thermodynamic studies

2020

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In this work, poly(m-aminobenzoic acid) (PABA) chelating polymer was synthesized and its sorption behaviors for Pt(IV) ions have been investigated. The PABA polymer was prepared by the reaction of m-aminobenzoic acid with ammonium peroxydisulfate. Fourier transform-infrared spectroscopy (FT-IR), thermal analysis (TG and DTA), field emission-scanning electron microscopy (FE-SEM), energy dispersive spectroscopy (EDS), X-ray diffraction (XRD) and surface porosity analytical methods were used in the characterization of the polymer. The FE-SEM images showed that the particles of the synthesized PABA polymer were about 2-10 μm. The PABA polymer is thermally stable up to 320 °C. The zero charge point of the polymer was found at pH 3.50. Batch adsorption experiments were used to examine the effects of pH, initial Pt(IV) concentration, contact time and temperature. The best adsorption values were obtained at pH 4, in which is above the zero charge point of the polymer. The equilibrium, kinetics and thermodynamics of Pt(IV) adsorption on the PABA polymer were examined. The Pt(IV) maximum adsorption capacity of the polymer is 2362 μg/g. The adsorption kinetic data fitted best to pseudo-second order kinetic model. The calculations with intra-particle diffusion and the Elovich models showed that the adsorption was controlled by intra-particle diffusion and chemisorption. The adsorption data fitted well to the Langmuir isotherm. It was found that the adsorption followed the pseudo-second-order kinetic model. In the thermodynamic calculations, the Gibbs free energies (ΔG°: (−10.98)-(−17.38) kJ/mol), the enthalpy (ΔH°:70.07 kJ/ mol) and the entropy (ΔS°: 215.3 kJ/mol) change values of the adsorption were calculated. The column adsorption-desorption and reusability studies of the PABA polymer were also performed. The results showed that Pt(IV) sorption on the PABA polymer is endothermic and chemical adsorption process which is governed by both ionic interaction and chelating mechanisms.

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Kinetic studies of the removal of Pt(IV) chloride complex ions from acidic aqueous solutions using activated carbon

Cited by 11 publications

References 38 publications

Spectrophotometric Analysis of the Kinetic of Pd(II) Chloride Complex Ions Sorption Process from Diluted Aqua Solutions Using Commercially Available Activated Carbon

Spectrophotometric Analysis of the Kinetic of Pd(II) Chloride Complex Ions Sorption Process from Diluted Aqua Solutions Using Commercially Available Activated Carbon

On the Rate of Interaction of Sodium Borohydride with Platinum (IV) Chloride Complexes in Alkaline Media

Sorption of Pt(IV) ions on poly(m-aminobenzoic acid) chelating polymer: Equilibrium, kinetic and thermodynamic studies

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