Application of high-performance liquid chromatography/high-resolution mass spectrometry to the investigation of sodium 2,3-disulfanyl-1-propanesulfonate (unithiol) and products of its oxidation with hydrogen peroxide

Kuleshov, D. O.; Berezkina, T. E.; Russkikh, Y. V.; Chernova, Ekaterina; Zhakovskaya, Z. А.; Masyukevich, S. V.; Gall, L. N.; Gall, N. R.

doi:10.1134/s1061934816140082

Cited by 2 publications

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References 3 publications

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“…The voltammogram of Fe(II)(DMPS) 2 showed a pair of distinct redox peaks with the half-wave potential at E 1/2 = −0.115 V vs Ag/AgCl, while Fe(III)(DMPS) 2 displayed a much lower peak current density at a nearby potential. It is known that Fe(III)(DMPS) 2 undergoes autoreduction, during which Fe(III) and DMPS in the complex react to generate a Fe(II) and DMPS dimer linked by a disulfide (RS–SR) bond. ,− This chemical reaction is related to the breakage of the complex and could deteriorate the electrochemical activity of Fe(III)(DMPS) 2 . The discrepancy in the shape between the reduction and oxidation peaks was also noticeable, suggesting the different reduction and oxidation environments of Fe(DMPS) 2 at the electrode.…”

Section: Resultsmentioning

confidence: 99%

Effective Electroregeneration of the Oxidized Iron(II) Thiochelate Absorbent in the Wet NO_X Absorption Process

et al. 2022

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The ever-increasing air pollution has brought the treatment of nitrogen oxides (NO X ) to the forefront of flue gas purification. Wet absorption achieves outstanding NO X removal efficiency, but it suffers from an oxidative deactivation of the NO X absorbent, iron(II) thiochelate, by the residual O2 in flue gases. To address this critical issue, we demonstrate a regeneration process to electrochemically reduce the oxidized iron thiochelate into the original form to effectively bind nitric oxide (NO). A series of voltammetric techniques were adopted to define the redox potentials of Fe(III)/Fe(II) thiochelate, represented as 2,3-dimercapto-1-propanesulfonate (DMPS). The electrochemical reduction of the oxidized iron thiochelate led to the transformations of disulfide (S–S) to a thiol (R–SH) and Fe(III) to Fe(II). Both the rate and Faradaic efficiency of electroregeneration could be enhanced through the adsorption between iron(II) thiochelate and a copper catalyst as revealed by X-ray photoelectron spectroscopy. At an optimal condition, recovery efficiencies of 99.8 and 96.1% for thiol and Fe(II) concentrations were obtained, respectively, on a Cu electrode at −1.3 V vs Ag/AgCl, thereby restoring 97.9% of NO absorption capacity. Our findings offer routes to complement the wet scrubbing NO X treatment technology while preventing the abuse of chemical absorbents.

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Section: Resultsmentioning

confidence: 99%

Effective Electroregeneration of the Oxidized Iron(II) Thiochelate Absorbent in the Wet NO_X Absorption Process

et al. 2022

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Structural diversity, biosynthetic aspects, and LC-HRMS data compilation for the identification of bioactive compounds of Lepidium meyenii

Carvalho

Ribeiro

2019

Food Research International

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Application of high-performance liquid chromatography/high-resolution mass spectrometry to the investigation of sodium 2,3-disulfanyl-1-propanesulfonate (unithiol) and products of its oxidation with hydrogen peroxide

Cited by 2 publications

References 3 publications

Effective Electroregeneration of the Oxidized Iron(II) Thiochelate Absorbent in the Wet NO_X Absorption Process

Effective Electroregeneration of the Oxidized Iron(II) Thiochelate Absorbent in the Wet NO_X Absorption Process

Structural diversity, biosynthetic aspects, and LC-HRMS data compilation for the identification of bioactive compounds of Lepidium meyenii

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Application of high-performance liquid chromatography/high-resolution mass spectrometry to the investigation of sodium 2,3-disulfanyl-1-propanesulfonate (unithiol) and products of its oxidation with hydrogen peroxide

Cited by 2 publications

References 3 publications

Effective Electroregeneration of the Oxidized Iron(II) Thiochelate Absorbent in the Wet NOX Absorption Process

Effective Electroregeneration of the Oxidized Iron(II) Thiochelate Absorbent in the Wet NOX Absorption Process

Structural diversity, biosynthetic aspects, and LC-HRMS data compilation for the identification of bioactive compounds of Lepidium meyenii

Contact Info

Product

Resources

About

Effective Electroregeneration of the Oxidized Iron(II) Thiochelate Absorbent in the Wet NO_X Absorption Process

Effective Electroregeneration of the Oxidized Iron(II) Thiochelate Absorbent in the Wet NO_X Absorption Process