Effect of gluconate ions on electroreduction phenomena during manganese deposition on glassy carbon in acidic chloride and sulfate solutions

Rudnik, Ewa

doi:10.1016/j.jelechem.2015.01.019

Cited by 27 publications

(16 citation statements)

References 26 publications

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“…The results obtained by GFC are consistent with previous studies 34,35 which suggest that at acid pH, weak Mn 2+ complexes are formed, in contrast to those at alkaline pH, which are more stable. This is consistent with the results obtained by Rudnik, 35 who demonstrated that the conditional Mn stability constants of Mn complexes are higher with Cl − than gluconate in acid media. In the present study, 0.1 mol L –1 NaCl at pH 6 was used as the mobile phase to counter the interaction between the complex and the stationary phase, influencing the Mn distribution obtained.…”

Section: Discussionsupporting

confidence: 91%

Implications of the Mn:ligand ratio for Mn uptake by Glycine max L. plants fertilized with heptagluconate and gluconate complexes

2021

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BACKGROUND The environmental risk of the application of synthetic chelates has furthered the implementation of biodegradable complexes to correct manganese (Mn)‐deficient plants. This study used the biodegradable ligands of heptagluconate (G7) and gluconate (G6) to test the influence of the Mn2+:ligand ratio on their fertilizers' capacity to provide Mn to plants. The efficacy of these complexes to correct Mn‐deficient soybean was evaluated in hydroponics and calcareous soil conditions and compared with the synthetic chelate EDTA (ethylenediaminetetraacetic acid). RESULTS This study demonstrated that G7 was a biodegradable alternative to EDTA for supplying Mn, maintaining an adequate nutritional balance compared with G6, which reduced iron (Fe) uptake by the plants. The efficacy of the Mn complexes depended on both the ligand and the Mn:ligand ratio, with the 1:1 and 1:2 molar ratios of Mn2+:G7 being the most effective complexes in the short term on the basis of their chemical structure and stability. CONCLUSION The Mn2+:G7 (1:1 and 1:2) complexes were found to be effective Mn sources for plant nutrition due to their chemical structures providing adequate stability in alkaline solution and their fast‐action effect. © 2021 Society of Chemical Industry

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Section: Discussionsupporting

confidence: 91%

Implications of the Mn:ligand ratio for Mn uptake by Glycine max L. plants fertilized with heptagluconate and gluconate complexes

2021

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“…The high value of α C for the gluconate ions indicates that the compound can also adsorb on the cathode surface during electrolysis. A similar effect was observed during the electrodeposition of manganese from slightly acidic gluconate solutions [26]. Thus, the rate-determining step for the electrodeposition of tin from acid stannous solutions that contain additives is most likely a charge transfer through a layer of adsorbed organic molecules.…”

Section: Fig 1 Cyclic Voltammetric Curves Registered On Platinum Elsupporting

confidence: 58%

“…A gelatin colloid is often used as an inhibitor in the electrodeposition of metals; namely, copper [23], tin [7], silver [24], and zinc [25]. Sodium gluconate is a non-corrosive, non-toxic, biodegradable, and renewable additive to electroplating baths and can be successfully used for the electrodeposition of heavy metals and alloys [15,16,18,[26][27][28]. It shows excellent chelating power to many metals and can form stable complexes not only in alkaline and concentrated alkaline solutions but also in acidic electrolytes.…”

Section: Resultsmentioning

confidence: 99%

Effect of Organic Additives on Electrodeposition of Tin From Acid Sulfate Solution

Rudnik

Chowaniec

2018

mafe

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Basic electrochemical experiments on the kinetics of tin deposition from an acid sulfate solution containing organic additives were performed. The measurements showed that tin deposits with activation polarization in a narrow potential range. Organic additives like gelatin and β-naphtol inhibit the charge transfer stage of the cathodic reaction due to the formation of adsorption layers. In turn, the gluconate ions increase the rate of tin deposition due to the bonding of hydrogen ions and inhibiting hydrogen coevolution. This results in serious changes in the morphology of tin deposits from isolated polyhedron crystals (no additive) via rectangular plates (β-naphtol) and thin plates (sodium gluconate) to rounded grains (gelatin).

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“…Cyclic voltammetry (CV) is commonly applied method to observe redox potential behaviour by measuring the current generated from the electron transfer between an electrode and an electrolyte solution as a function of changes in potential. is experiment utilises a cell equipped with three electrodes: the reference, working, and auxiliary electrodes [24][25][26][27][28][29]. CV is frequently used in applied electrochemistry, analytical electrochemistry, and surface coating [24,25,[28][29][30].…”

Section: Introductionmentioning

confidence: 99%

“…is experiment utilises a cell equipped with three electrodes: the reference, working, and auxiliary electrodes [24][25][26][27][28][29]. CV is frequently used in applied electrochemistry, analytical electrochemistry, and surface coating [24,25,[28][29][30]. In contrast, there is a lack of information regarding its application in the food and health fields.…”

Section: Introductionmentioning

confidence: 99%

Cyclic Voltammetry and Oxidation Rate Studies of Ferrous Gluconate Complex Solutions for Preparation of Chitosan-Tripolyphosphate Microparticles

Handayani

Krisanti

Kartohardjono

et al. 2020

Journal of Chemistry

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A proper understanding of the properties of iron could increase the effectiveness of programmes for alleviating iron deficiency. Recently, encapsulation has been considered an appropriate method for protecting iron from injurious reactions. However, several events may occur during encapsulation processes, including changes in the iron’s oxidation state. Oxidation of ferrous iron is not desirable since the intestines can only absorb iron in the ferrous form. In this study, a cyclic voltammetry method was applied to investigate the likelihood of ferrous gluconate oxidation for the preparation of chitosan-tripolyphosphate microparticles. Then, the electrochemical properties of ferrous gluconate were confirmed experimentally. The oxidation rate of ferrous gluconate is also discussed in this paper. All the experimental solutions were formulated in detail to produce conditions similar to those of microparticle production. Cyclic voltammetry analysis was conducted using a configuration of three electrodes connected to an electrochemical analyser. Graphite, platinum wire, and Ag/AgCl were employed as the auxiliary, working, and reference electrodes, respectively. The cyclic voltammetry results show that the observed potential for each anodic peak shifted negatively in the presence of chitosan and sodium tripolyphosphate. Moreover, the rate of ferrous oxidation tended to increase during 75 min of experiments due to the presence of chitosan and sodium tripolyphosphate. These behaviours indicate the transformation of ferrous iron to ferric iron during iron microparticle preparation. Furthermore, these findings suggest that spray drying is a preferable method to minimise the oxidation reaction.

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Effect of gluconate ions on electroreduction phenomena during manganese deposition on glassy carbon in acidic chloride and sulfate solutions

Cited by 27 publications

References 26 publications

Implications of the Mn:ligand ratio for Mn uptake by Glycine max L. plants fertilized with heptagluconate and gluconate complexes

Implications of the Mn:ligand ratio for Mn uptake by Glycine max L. plants fertilized with heptagluconate and gluconate complexes

Effect of Organic Additives on Electrodeposition of Tin From Acid Sulfate Solution

Cyclic Voltammetry and Oxidation Rate Studies of Ferrous Gluconate Complex Solutions for Preparation of Chitosan-Tripolyphosphate Microparticles

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