ChemInform Abstract: Solid‐Phase Spectrophotometry

Brykina, G. D.; Marchenko, D. Yu.; Шпигун, О. А.

doi:10.1002/chin.199550296

Cited by 6 publications

(7 citation statements)

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“…It can be seen from these data that the maximum in diffuse reflectance spectra is located at 410 nm. It corresponds with the maximum in absorption spectrum at 390 nm (Figure 1), since the bathochromic shift of maximum in diffuse reflectance spectra is observed during sorption concentration of noble metal ions in view of matrix effect of solid phase [43,44]. Therefore, the prevailing form of existence in nitrate weak acidic solutions of spent catalysts is its complex…”

Section: Sorption Of Palladium From Nitrate Solutions Of Spent Catalystsmentioning

confidence: 99%

Ion exchange recovery of palladium (II) from nitrate weak acidic solutions

Кононова¹,

Goryaeva²,

Dychko³

2009

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Sorption recovery of palladium (II) from nitrate weak acidic model solutions and solutions of spent catalysts on some ion exchangers with different physical and chemical structure has been investigated. The palladium concentration in contacting solutions was 5.0 ? 10-5 – 1.0 ? 10-3 mol/L at nitric acid and potassium nitrate con-centrations 0.01 and 1.0 mol/L, respectively. It was shown that anion exchangers AV-17-8 as well as Purolite S 985 and A 500 possess the best sorption and kinetic properties. These sorbents can be recommended for selective recovery of palladium from solutions of spent catalysts

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Section: Sorption Of Palladium From Nitrate Solutions Of Spent Catalystsmentioning

confidence: 99%

Ion exchange recovery of palladium (II) from nitrate weak acidic solutions

Кононова¹,

Goryaeva²,

Dychko³

2009

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“…SPS combines the preconcentration of the species of interest on a solid substrate with subsequent measurement of the absorbance in solid phase (Brykina et al 1995, Yadollah and Atefeh 2002, Liu et al 2004, Pascual -Reguera et al 2004 ). The preconcentration step consists either of the sorption of analyte with reagents immobilized on the surface of a solid support or of the sorption of the analyte-reagent complex obtained in solution phase on the solid surface.…”

Section: Introductionmentioning

confidence: 99%

Solid-phase spectrophotometry use for the determination of trace amounts of Rh(III)

Tofan

2011

Reviews in Analytical Chemistry

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A simple and sensitive solid-phase spectrophotometric method was developed for the determination of rhodium(III) trace amounts. The proposed procedure is based on the reaction product of disodium-1-nitroso-2-hydroxynaphthalene-3,6-disulfonate(Nitroso R salt) previously loaded on Dowex 1 × 1 anion exchanger. To fi nd the best analytical conditions for the determination, the experimental variables (wavelength, pH, amount of resin, sample solution volume) were optimized. Under the selected conditions, rhodium(III) can be accurately determined in the range of 0.5 -2 µ g/ml with an RSD of 1.18 % and a degree of sensitivity, expressed by the molar absorptivity, of 3.0356 × 10 4 l/mol cm. The results obtained on synthetic solutions clearly indicate the feasibility of the proposed method for real sample analysis.

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“…For these reasons, a scheme to recover Rh strongly retained by the resin via fuming, whereby resin is incinerated and Rh is recovered from the resulting ashes remains plausible (Hubicki et al, 2007). Such an approach may be economical and feasible for industrial application as the revenue from the metal recovered usually exceeds the losses due to the cost of the resins replacement even after a single adsorption (Brykina et al, 1995;Kononova et al, 2008;2010c).…”

Section: Bv/hmentioning

confidence: 99%

Recovery of platinum, palladium and rhodium from acidic chloride leach solution using ion exchange resins

2015

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ÔØ Å ÒÙ× Ö ÔØRecovery of platinum, palladium and rhodium from acidic chloride leach solution using ion exchange resins This is a PDF file of an unedited manuscript that has been accepted for publication. As a service to our customers we are providing this early version of the manuscript. The manuscript will undergo copyediting, typesetting, and review of the resulting proof before it is published in its final form. Please note that during the production process errors may be discovered which could affect the content, and all legal disclaimers that apply to the journal pertain. A C C E P T E D M A N U S C R I P T ACCEPTED MANUSCRIPT AbstractThe objective of this study was to investigate the applicability and performance of the selected ion exchangers with different physicochemical characteristics and functional groups to simultaneously recover three different platinum group elements (PGE), platinum(IV), palladium(II) and rhodium(III), present in a chloride solution produced by the leaching of spent automotive catalysts. The tested ion exchangers included a resin with a quaternary ammonium functional group (Lewatit MonoPlus (M+) MP 600), a resin with a polyamine functional group (Purolite S985) and a resin with a thiouronium functional group (XUS 43600.00). The study also focused on the achievable desorption from the loaded resins using different eluent systems. The leach solution was chlorine-saturated and contained 2.35 mol/L hydrochloric acid, platinum and palladium in concentrations of 0.13 mmol/L, and rhodium 0.03 mmol/L. It was found that XUS 43600.00 showed the best adsorption performance for platinum(IV) and palladium(II) chloride complexes among the investigated resins, but weak affinity for rhodium(III) chloride complexes was observed for all three resins. The adsorption kinetics were found to obey the Ho pseudo-second order expression. For Lewatit MonoPlus (M+) MP 600 and Purolite S985 the adsorption was best described by the Freundlich isotherm, while for XUS 43600.00 the Langmuir isotherm was more apt. Desorption of the PGE was examined using four different elution agents: sodium thiocyanate (2 mol/L); hydrochloric acid (2 mol/L); thiourea (1 mol/L) in hydrochloric acid (2 mol/L); and thiourea(1 mol/L) in sodium hydroxide (2 mol/L). The results showed that platinum and palladium can be fully eluted with the acidic thiourea but desorption of rhodium proved difficult with all the eluents.

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ChemInform Abstract: Solid‐Phase Spectrophotometry

Cited by 6 publications

References 0 publications

Ion exchange recovery of palladium (II) from nitrate weak acidic solutions

Ion exchange recovery of palladium (II) from nitrate weak acidic solutions

Solid-phase spectrophotometry use for the determination of trace amounts of Rh(III)

Recovery of platinum, palladium and rhodium from acidic chloride leach solution using ion exchange resins

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