Solubility of sodium and potassium iodates in saturated salt solutions

Winger, R. J.; Ren, Lu Yao

doi:10.1016/j.foodchem.2008.08.021

Cited by 4 publications

(2 citation statements)

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“…However, as indicated by the simulated iodide profile, the iodide concentration is strongly depleted under these conditions. Because the solubility of the corresponding IO − or IO 3 − salts is significantly different, the phase state of the particle might drastically change, so that the water content and therefore iodide concentration derived from the wet pure KI particle size are not correct anymore. This effect of strong depletion of iodide was also observed in other experiments (e.g., 23) at high ozone concentration and low aerosol liquid volume.…”

Section: Resultsmentioning

confidence: 99%

Uptake of Ozone to Deliquesced KI and Mixed KI/NaCl Aerosol Particles

2010

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The kinetics of uptake of ozone to deliquesced potassium iodide (KI) aerosol particles has been investigated in an aerosol flow tube at 72-75% relative humidity, room temperature, and atmospheric pressure. The observed loss of ozone was further analyzed in terms of a numeric model to explicitly track the iodide concentration in the particles. This allowed retrieving a value alpha(b) = 0.6 +/- (0.5)(0.4) for the bulk accommodation coefficient (alpha(b)). The second order rate constant in the bulk phase agreed with available literature (k(b) = (1.0 +/- 0.3) x 10(9) M(-1) s(-1)) even for the high ionic strength conditions of the present experiments. As long as iodide remained in excess, the average uptake coefficient was gamma = (1.10 +/- 0.20) x 10(-2). Different experiments were performed where the iodide to chloride ratio, the ozone concentration, and the surface to volume ratio of particles were varied. In combination, the results obtained indicate that uptake was driven by fast bulk accommodation and reaction in the bulk for all conditions investigated. The results further suggest that ozone uptake is not limited by the bulk accommodation coefficient alpha(b) under atmospheric conditions.

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