The absorption of oxygen into sodium sulphite solution

Yagi, Shuhei; Inoue, Hakuai

doi:10.1016/0009-2509(62)85010-6

Cited by 42 publications

(16 citation statements)

References 21 publications

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Mentioning

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Order By: Relevance

“…Equation (11) predicts orders with respect to S0 3 2 " and H + in agreement with those observed in many experimental studies ( Table 1). The halforder dependence on 0 2 has not been observed in any of the studies of the uncatalysed oxidation of sulphite, while a first-order dependence on 0 2 concentration has been noted in some studies at particular experimental conditions (6,18). The [M*]2 dependence has not been specifically reported in any of the kinetic experiments, however the observed variation in the oxidation rate with water quality may be due to the effect of metal ion impurities ( Table 2).…”

Section: Mechanismmentioning

confidence: 79%

“…However, Yagi and Inoue (6) observed that the rate was first-order in 0 2 concentration at pH 8 to 9, while Larson et al (18) report an oxygen dependence at higher pH (> 9.5). O'Brien and Birkner (17) report an 0 2 dependence for the reaction, however they did not study sulphite oxidation directly but inferred the rate law from experiments into sulphide oxidation.…”

Section: Kineticsmentioning

confidence: 95%

“…Applying the steady state hypothesis to the Backstrom mechanism and assuming long chains, termination by reaction (10), rate limitation by reaction (7), and initiation by reaction (6) it is possible to derive a theoretical rate law for the process:…”

Section: Mechanismmentioning

confidence: 99%

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On the discrepancy between reported studies of the uncaialysed aqueous oxidation of SO₂by O₂

Radojević

1984

Environmental Technology Letters

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The uncatalysed aqueous oxidation of S0 2 is a reaction with diverse applications, and it has long been the subject of considerable controversy. The extensive literature on this reaction is critically reviewed and the results of kinetic studies are presented in tabular form. A number of factors which may be responsible for the discrepancy between reported experiments are discussed, and of these the pH and the purity of experimental solutions appear to be the most important. The following rate equation is proposed for predicting atmospheric oxidation rates via this reaction:The mechanism appears to be of little consequence in the conversion of atmospheric SO 2 .

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Section: Mechanismmentioning

confidence: 79%

Section: Kineticsmentioning

confidence: 95%

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On the discrepancy between reported studies of the uncaialysed aqueous oxidation of SO₂by O₂

Radojević

1984

Environmental Technology Letters

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“…The first set of experiments was carried out to study the reaction rate as a function of HSO 3 Ϫ concentration at the temperature of 45°C and a fixed Co 2ϩ concentration ͑c Co 2ϩ ϭ 1 mol m Ϫ3 ). The second set includes experimental runs carried out at three different temperature levels (25,45, and 55°C) by varying catalyst concentration at fixed SO 2 and Ca(OH) 2 levels in feed solution. The third experimental set was carried out in the simultaneous presence of the two catalysts at the temperature of 45°C.…”

Section: Resultsmentioning

confidence: 99%

“…The kinetics of these reactions (in particular, of oxygen absorption by solutions of calcium bisulfite) in the absence 2,3 and in presence 4 -6 of catalysts has been of great interest during the last 5 decades. The main engineering uses of sulfite (SO 3 2Ϫ ) oxidation are the determination of the interfacial area or the volumetric mass transfer constant in gas-liquid contactors and, recently, the oxidation of calcium sulfite waste products in FGD.…”

Section: Introductionmentioning

confidence: 99%

Sulfite Oxidation Catalyzed by Cobalt Ions in Flue Gas Desulfurization Processes

Karatza

Prisciandaro

Lancia

et al. 2010

Journal of the Air & Waste Management Association

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This paper presents an experimental study of calcium bisulfite oxidation, a key step in the wet limestonegypsum flue gas desulfurization (FGD) process, in the presence of catalysts (e.g., cobalt ions and a mixture of ferrous and cobalt ions). A fundamental approach is followed, by reproducing a simplified synthetic FGD liquor in which both catalyst ions, alone or mixed together, are present. A laboratory-scale apparatus is used, in which sulfurous solution is contacted with a gas phase at a fixed oxygen partial pressure (21.3 kPa) and at different temperature levels (25, 45, and 55°C). The experimental results are analyzed using the theory of gas-liquid mass transfer with chemical reaction, showing that the slow reaction regime is explored and the transition from the kinetic to the diffusional subregime is identified. The experimental results are compared with those obtained in the presence of other catalytic species (manganese and ferrous ions), showing that cobalt is effective in catalyzing the oxidation of calcium bisulfite to sulfate, but to a minor extent with respect to iron and manganese.

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Bleaching‐Resistant Super‐Resolution Fluorescence Microscopy

2022

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Photobleaching is the permanent loss of fluorescence after extended exposure to light and is a major limiting factor in super‐resolution microscopy (SRM) that restricts spatiotemporal resolution and observation time. Strategies for preventing or overcoming photobleaching in SRM are reviewed developing new probes and chemical environments. Photostabilization strategies are introduced first, which are borrowed from conventional fluorescence microscopy, that are employed in SRM. SRM‐specific strategies are then highlighted that exploit the on–off transitions of fluorescence, which is the key mechanism for achieving super‐resolution, which are becoming new routes to address photobleaching in SRM. Off states can serve as a shelter from excitation by light or an exit to release a damaged probe and replace it with a fresh one. Such efforts in overcoming the photobleaching limits are anticipated to enhance resolution to molecular scales and to extend the observation time to physiological lifespans.

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The absorption of oxygen into sodium sulphite solution

Cited by 42 publications

References 21 publications

On the discrepancy between reported studies of the uncaialysed aqueous oxidation of SO₂by O₂

On the discrepancy between reported studies of the uncaialysed aqueous oxidation of SO₂by O₂

Sulfite Oxidation Catalyzed by Cobalt Ions in Flue Gas Desulfurization Processes

Bleaching‐Resistant Super‐Resolution Fluorescence Microscopy

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The absorption of oxygen into sodium sulphite solution

Cited by 42 publications

References 21 publications

On the discrepancy between reported studies of the uncaialysed aqueous oxidation of SO2by O2

On the discrepancy between reported studies of the uncaialysed aqueous oxidation of SO2by O2

Sulfite Oxidation Catalyzed by Cobalt Ions in Flue Gas Desulfurization Processes

Bleaching‐Resistant Super‐Resolution Fluorescence Microscopy

Contact Info

Product

Resources

About

On the discrepancy between reported studies of the uncaialysed aqueous oxidation of SO₂by O₂

On the discrepancy between reported studies of the uncaialysed aqueous oxidation of SO₂by O₂