Discussion

MANCY, K.H.; OKUN, D.A.

doi:10.1016/b978-0-08-012999-0.50031-9

Cited by 3 publications

(3 citation statements)

References 8 publications

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“…The per cent reduction in KL is highest for moderate mixing conditions and lower for both low and intense conditions. This is similar to results reported by Mancy and Okun (1965) who found no effect at low speeds with the absorption coefficient undergoing a marked depression over a range of intermediate speeds and converging to pure water values at high speeds. This trend may indicate that the major effect of surface active substances is on the frequency of surface renewals (Davidson.…”

Section: Methodssupporting

confidence: 91%

Surface Effects in Gas Absorption

Metzger¹

1968

Environ. Sci. Technol.

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Section: Methodssupporting

confidence: 91%

Surface Effects in Gas Absorption

Metzger¹

1968

Environ. Sci. Technol.

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“…The depression of the mass transfer coefficient by surface active solutes has been observed and discussed by a number of authors (Baird and Davidson, 1962;Holroyd and Parker, 1952;Mancy and Okun, 1965;Timson and Dunn, 1960). This lowering of the coefficient does not necessarily mean that the mass transfer through the total surface area is decreased.…”

Section: Effects Of Surface Active Substances On Mass Transfer In Gas...mentioning

confidence: 96%

Effects of Chemical Additives on Performance of an Air-Water Contactor

Zieminski¹,

Lessard²

1969

Ind. Eng. Chem. Proc. Des. Dev.

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rial and labor costs is necessary. Because of the small material requirements, it is necessary to apply the solid suppressant as a dilute water suspension, and the dispensers must be close together to maintain a continuous cover.If the dispensers are placed too far apart, waves submerge the film and the cover is lost at higher wind speeds when mass transfer is accelerated and the protection is most needed. The ability to maintain a film coverage at wind speeds as high at 27 miles per hour has been demonstrated in wind-tunnel tests, but above 9 miles per hour the rate of addition must be increased as the square of the wind speed to suppress the formation of waves which would submerge the film. The film is unable to resist wind displacement and is removed at a rate of 1/31 of the wind speed.A prototype wind-regulated system has been operated on a small lake with good results. Further developmental work is needed, however, to perfect wind-operated valves controlling flow of the film-forming suspension to dispensers on the windward shore. Continued operation of a prototype is needed to establish optimal location of the dispensers for maintenance of a continuous cover under severe wind conditions. Field operations will be helpful for determining methods that will decrease evaporation losses and reduce labor charges, which are the largest cost item.

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“…In searching the literature, however, one finds that very little basic work has been done in determining the effects of dissolved ions on this type of system. Though the effects of surface-active agents on aqueous interfacial phenomena have been studied in considerable detail (Carver, 1956;Mancy and Okun, 1965;Zieminski, et al, 1960; Zieminski, et al, 1967; Zieminski and Hill, 1962; Zieminski and Lessard, 1969), the dependence of the degree of bubble coalescence on ionic charge remains unclear and the effects of electrolytes on the resistance to gas transfer are practically unexplored.…”

mentioning

confidence: 99%