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Friday, August 14, 2020 | History

2 edition of Gas-film coefficients for the volatilization of ketones from water found in the catalog.

Gas-film coefficients for the volatilization of ketones from water

R. E. Rathbun

Gas-film coefficients for the volatilization of ketones from water

by R. E. Rathbun

  • 38 Want to read
  • 25 Currently reading

Published by U.S. G.P.O., For sale by the distribution Branch, Text Products Section, U.S. Geological Survey in Washington, Alexandria, VA .
Written in English

    Subjects:
  • Evaporation.,
  • Ketones.,
  • Film coefficients (Physics)

  • Edition Notes

    Bibliography: p. 32-34.

    Other titlesVolatilization of ketones from water.
    Statementby R.E. Rathbun and D.Y. Tai.
    SeriesU.S. Geological Survey water-supply paper ;, 2286
    ContributionsTai, D. Y.
    Classifications
    LC ClassificationsQC304 .R36 1986
    The Physical Object
    Paginationviii, 36 p. :
    Number of Pages36
    ID Numbers
    Open LibraryOL2663062M
    LC Control Number85600076

    Weight of water leaving evaporator = X 18 = il.5 grams or lb 44 BEHAVIOR OF IDEAL GASES [CHAP. II Weight of water evaporated per cu ft of gas entering, • 2: 2? ^ ^:: b Pure-component Volume Method. Where the ideal gas law m a y be applied, t h e above m e t h o d of calculation is unnecessarily tedious.   The liquid-film and gas-film coefficients of the two-film model were determined for the ketones from the overall coefficients, and both film resistances were important for volatilization of the liquid-film coefficients for the ketones varied with the power of the molecular-diffusion coefficient, in agreement with the.

    Odours in Wastewater Treatment - Free ebook download as PDF File .pdf), Text File .txt) or read book online for free. Measurement, Modelling and Control Edited by Richard Stuetz School of Water Sciences, Cranfield University, UK and Franz-Bernd Frechen Department of Sanitary and Environmental Engineering, University of Kassel, Germany5/5(1).   Novel proton exchange membranes based on structure-optimized poly(ether ether ketone ketone)s and nanocrystalline cellulose. NASA Astrophysics Data System (ADS) Ni.

    DIFFUSION THROUGH A STAGNANT GAS FILM The procedure for the shell mass balance is as follows: A mass balance is made over a thin shell perpendicular to the direction of mass transport, and this shell balance leads to a first-order differential equation, which may be solved to get the mass flux distribution. Into this expression we insert the 5/5(3). Ozone Reaction Kinetics for Water and Wastewater Systems plans to reexamine the bromate MCL in its 6-year review process So, when using ozone in the treatment of water some care must be taken to eliminate or reduce DBPs as much as possible.


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Gas-film coefficients for the volatilization of ketones from water by R. E. Rathbun Download PDF EPUB FB2

Gas-Film Coefficients for the Volatilization of Ketones from Water By R. RATHBUN and D. TAI U.S. GEOLOGICAL SURVEY WATER-SUPPLY PAPER Cited by: 2. Get this from a library.

Gas-film coefficients for the volatilization of ketones from water. [R E Rathbun; D Y Tai]. Gas-film coefficients for the volatilization of ketones from water [R. Tai, D. Rathbun] on *FREE* shipping on qualifying : Rathbun, R. Tai, D. The gas-film coefficients determined in this study by an indirect procedure were also compared with gas-film coefficients determined directly by measuring the volatilization fluxes of the pure ketones.4 This comparison was done in terms of the reference substance concept for the gas-film coefficients.4 Review of Previous Work Rathbun and Tat1 Cited by: 5.

The overall mass-transfer coefficients for the volatilization from water of acetone, 2-butanone, 2-pentanone, 3-pentanone, 4-methylpentanone, 2-heptanone, and 2-octanone were measured simultaneously with the oxygen-absorption coefficient in a laboratory stirred water bath. The liquid-film and gas-film coefficients of the two-film model were determined for the Cited by: 7.

Gas-film coefficients were calculated from these volatilization fluxes and related to the gas-film coefficient for the evaporation of water. These relations, when combined with an equation for estimating the gas-film coefficient for evaporation of water from a canal, permit estimating gas-film coefficients for the volatilization of ketones from Cited by: 7.

Gas-film coefficients 14 Presentation and discussion of results of the application of the two-film model to the volatilization of organic compounds from water 15 Overall mass-transfer coefficients 15 Gas-film coefficients 15 Henry's law constants 16 Liquid-film coefficients 17 Cited by: 9.

Gas-film coefficients for the volatilization of these ketones from water determined by two different methods were in reasonable agreement. Cite Request full-text. D.Y. Tai's 18 research works with citations and reads, including: Bacterial degradation of acetone in an outdoor model stream.

Rathbun, RE, Tai DY. Volatilization of ketones. Water Air Soil Pollut *Rathbun RE, Tai DY. Vapor pressures and gas-film coefficients for ketones. Chemosphere *Raunio H, Liira J, Elovaara E, et al. Cytochrome P isozyme induction by methyl ethyl ketone and m-xylene in rat liver. Toxicol Appl Pharmacol.

•Examples of Liquid film controls: Absorption of CO2, H2,O2,Cl2 in water; •When the solubility of the gas is very high, m is very small and the gas- film resistance controls the rate of absorption.

•Examples of gas-film controls: Absorption of HCl, NH3 in water; NH3 in acid solution; SO2, H2S in basic solvent. coefficients (PCs) in PEs, in which the conjugate forces and flows are identified by the dissipation function were denoted by the authors as the dissipation-phenomenological equation (DPE) approach.

Leuthner et al. [6] studied heat and mass transfer of an. evaporating wavy falling film of a water–ethylene glycol mixture. Mass transfer coefficients To simplify calculations we usually define a mass transfer coefficient for either the liquid or gas phase as k l or k g (dimensions = L/t).

n k l,g D G. gas film. But we assume instant equilibrium at the interface so there is no transfer limitation here. It should be noted that model selectionFile Size: KB. a) Calculate the k L NH3 (liquid film coefficient) for ammonia, if that of the oxygen in the water is kmol m-2 s-1 (kmol m-3)-1 using the equation below, if the diffusion coefficients for ammonia and oxygen in water under these conditions are x.

EPA / APRIL METHODS FOR ASSESSING EXPOSURE TO CHEMICAL SUBSTANCES Volume 7 Methods for Assessing Consumer Exposure to Chemical Substances by Patricia D. Jennings, Karen A. Hammerstrom, Leslie Coleman Adkins, Thompson Chambers, Douglas A.

Dixon EPA Contract No. Project Officer Elizabeth F. Bryan Exposure. The influence of the specified initial condition at a specific site may be easily tested through comparison of model predictions using volatilization release model 3 (Equation ), with the depth of clean cover, d, specified as an arbitrarily small value, such as cm.

S Volatilization from a Contaminated Water Body The mass flux of a. The mean volatilization coefficient for acetone in a model outdoor stream was found to be in the range of × to × /min (Rathbun et al.,). Therefore, the volatilization half-life of acetone from the model stream is in the range of h.

3 molecular weight of A massof A Number of moles = A A A M m n = (2) Therefore from (1) & (2) A A A A V M n C ρ = = For ideal gas mixtures, RT p V n A A = [ from Ideal gas law PV = nRT] RT p V n C A A A = = where p A is the partial pressure of species A. Consider a tank of some volatile liquid, A, which is vented to the atmosphere through a chimney that has a stiff breeze blowing by we have reached steady state, there will be a mixture of A and air (which we will call B) within the A is evaporating and flowing (diffusing) up through the column until it is ultimately blown away by the wind.

Books and Book Chapters. Alpers, C.N.,Responsibilities and activities of the U.S. Geological Survey related to mining and the environment, in Workshop report. For a binary mixture of A and B, the mass flux, nA,z, of species A relative to the z axis is nA,z = − ρDAB A d dz ω + ωA(nA,z + nB,z) () The molar flux of species i can be expressed as Ni = civi () In this equation, is the absolute velocity of species i File Size: 58KB.Research on Ground- and Surface-Water Contamination.

Sort by Author. Sort by Year.Partition coefficients of organic compounds in lipid water systems and correlations with fish Oren, A., and Stan-Lotter, H., eds., Polyextremophiles--Life Under Multiple Forms of Stress (Book Series--Cellular Origin, Life in Extreme Habitats and.This banner text can have markup.

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