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RECORD NUMBER: 435 OF 3655

OLS Field Name OLS Field Data
Main Title Correlations for the determination of surface diffusivities of organic chemicals adsorbed onto granular activated carbon /
Author Dobrzelewski, Mark.
CORP Author Michigan Technological Univ., Houghton.;Environmental Protection Agency, Cincinnati, OH. Water Engineering Research Lab.
Publisher Water Engineering Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency,
Year Published 1986
Report Number EPA/600/2-86/082
Stock Number PB87-102273
OCLC Number 17003907
Subjects Water--Purification--Organic compounds removal.
Additional Subjects Potable water ; Diffusion ; Activated carbon ; Surface chemistry ; Toluene ; Beds(Process engineering) ; Mass transfer ; Adsorption ; Thesis ; Water pollution control ; Volatile organic compounds ; Ethylene/trichloro ; Ethylene/tetrachloro ; Ethylene/dichloro
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EJBD ARCHIVE EPA-600-2-86-082 Headquarters Library/Washington,DC 08/04/2014
NTIS  PB87-102273 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/21/1988
Collation xiv, 147 leaves : ill. ; 28 cm.
Abstract
Differential column batch reactor (DCBR) experiments in organic-free water were conducted for the following volatile organic compounds (VOCs): trichloroethene, tetrachloroethene, cis-1,2 dichlorethene, and toluene. Surface diffusion was required to explain the rate of uptake for the VOCs, and the contribution of pore diffusion was determined to be negligible. Since considerable time is required to conduct a DCBR study, a correlation was developed for the surface diffusion based on the liquid diffusivity of the adsorbates and the physical properties of the activated carbon. The correlation can be used to calculate the surface diffusivities of halogenated one- and two-carbon molecules and some aromatic substituted organic compounds for two types of carbons. The significance of the correlation is that it can be used to calculate the mass transfer zone lengths of VOCs in a fixed-bed adsorber with a fair amount of precision.
Notes
"September 1986."