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Electrochemical oxidation of sulphite ions at graphite electrodes
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TLDR
In this paper, a study of the electrochemical oxidation of sodium sulphite in aqueous sodium sulphate solution at two different graphite electrodes, one being of natural graphite (EC) and the other impregnated with phenol (ECK), was conducted to obtain some insight into the direct oxidation and indirect oxidation via produced oxygen radical species, of sulphite on non-metal electrodes.Abstract:
The electrochemical oxidation of sodium sulphite has been studied in aqueous sodium sulphate solution at two different graphite electrodes, one being of natural graphite (EC) and the other impregnated with phenol (ECK). The objective of the present work was to obtain some insight into the direct oxidation as well as the indirect oxidation, via produced oxygen radical species, of sulphite on non-metal electrodes. For this reason a study of the oxidation of sulphite in the concentration range between 0–0.10m in aqueous sodium sulphate using a batch electrochemical reactor, operating potentiostatically, was undertaken. The potential range was chosen between 1.0 to 2.5 V/SCE, and the concentration of the supporting electrolyte, sodium sulphate, was kept constant at 0.5m. A kinetic Tafel type law, considering irreversible behaviour for the direct sulphite oxidation and the mass transfer performance in regards to the experimental conditions were applied to predict the time variations of the sulphite conversion.read more
Citations
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Electrochemical approaches to environmental problems in the process industry
K. Jüttner,U Galla,H Schmieder +2 more
TL;DR: In this paper, the authors describe effluent treatment, electrochemical reactors for removal of metal ions from waste water, anodic destruction of organic pollutants and new electrochemical abatement techniques for purification of flue gases.
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Landfill leachate treatment by electrochemical oxidation
Mohammed J.K. Bashir,Mohamed Hasnain Isa,Shamsul Rahman Mohamed Kutty,Zarizi Awang,Hamidi Abdul Aziz,Soraya Mohajeri,Izharul Haq Farooqi +6 more
TL;DR: Electrochemical treatment using graphite carbon electrode was found to be effective in BOD, COD and color removal but was not effective in increasing the BOD/COD ratio or enhancing biodegradability of the leachate.
Journal ArticleDOI
Electrochemical oxidation of sulfite and sulfur dioxide at a renewable graphite electrode
A.G. Zelinsky,B.Ya. Pirogov +1 more
TL;DR: In this article, the potentials of S(IV) species were investigated on a renewable graphite electrode as the dependence on the concentration of these particles, electrode potential and pH of solution.
Journal ArticleDOI
Electrowinning of copper from sulfate electrolyte in presence of sulfurous acid
TL;DR: In this article, the electrowinning of copper from acidic sulfate solution in the presence of sulfurous acid using a graphite anode was investigated and the effects of operating variables including sulfur dioxide concentration, copper concentration, sulfuric acid concentration, current density and temperature on the cell voltage, anode potential, power consumption, current efficiency, deposit quality, surface morphology, crystallographic orientations and polarisation characteristics were studied.
Journal ArticleDOI
An investigation of anode materials in the anodic oxidation of sulphur dioxide in sulphuric acid solutions
Keith Scott,W.M. Taama +1 more
TL;DR: In this article, the anodic oxidation of sulphur dioxide in concentrated aqueous solutions of sulfuric acid, on anodes of palladium, palladium-coated graphite and palladium coated Ebonex®, platinised titanium, stainless steel, lead dioxide, glassy carbon and impregnated graphites and non-impregnated graphs was investigated by linear sweep voltammetry.
References
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Standard Potentials in Aqueous Solution
TL;DR: Standard Potentials in Aqueous solution as mentioned in this paper is a collection of thermodynamic data from the IUPAC Commissions onElectrochemistry and Electroanalytical Chemistry, and it is a valuable supplementarytext for undergraduate and graduate-level chemistry students.
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Individual Activity Coefficients of Ions in Aqueous Solutions
TL;DR: A revised and extended table of ionic activity coefficients, which has largely been computed by independent means, taking into consideration the diameter of the hydrated ions,* as estimated by various methods, is presented in this article.
Journal ArticleDOI
The diffusion of ferro- and ferricyanide ions in aqueous solutions of sodium hydroxide☆
J.C. Bazán,Alejandro Jorge Arvia +1 more
TL;DR: In this article, the diffusion of ferri-and ferrocyanide ions in sodium hydroxide solutions has been studied by means of a platinum rotating disk electrode, and the product Dn /T was approximately constant and independent of temperature in the range studied.
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