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Main Title Natural Gradient Experiment on Solute Transport in a Sand Aquifer. 3. Retardation Estimates and Mass Balances for Organic Solutes.
Author Roberts, P. V. ; Goltz, M. N. ; Mackay, D. M. ;
CORP Author Stanford Univ., CA. Dept. of Civil Engineering.;Robert S. Kerr Environmental Research Lab., Ada, OK.
Year Published 1986
Report Number EPA-R-808851; EPA/600/J-86/330;
Stock Number PB87-182838
Additional Subjects Organic compounds ; Solutes ; Aquifers ; Water pollution ; Hazardous materials ; Ground water ; Carbon tetrachloride ; Tetrachloroethylene ; Bromoform ; Chlorodienzenes ; Chloroethanes ; Sorption ; Sampling ; Chlorides ; Retarding ; Reprints ;
Library Call Number Additional Info Location Last
NTIS  PB87-182838 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 14p
The long-term behavior of five organic solutes during transport over a period of 2 years in ground water under natural gradient conditions was characterized quantitatively by means of moment estimates. Total mass was conserved for two of the organic compounds, carbon tetrachloride and tetrachloroethylene, while the total mass declined for three other compounds, bromoform, 1,2 -dichlorobenzene, and hexachloroethane. The declines in mass for the latter three compounds are interpreted as evidence of transformation of the compounds. Retardation factors for the organic solutes, relative to chloride, ranged from 1.5 to 9.0, being generally greater for the more strongly hydrophobic compounds. The retardation is attributed to sorption. (Copyright (c) 1986 by the American Geophysical Union.)