Accession Number:

ADA158096

Title:

Sorption and Desorption of Volatile Chlorinated Aliphatic Compounds by Soils and Soil Components

Descriptive Note:

Technical Report

Corporate Author:

AIR FORCE INSTITUTE OF TECHNOLOGY WRIGHT-PATTERSON AFB OH WRIGHT-PATTERSON AFB United States

Personal Author(s):

Report Date:

1985-06-01

Pagination or Media Count:

327.0

Abstract:

Many groundwater supplies in the industrialized nations of the world are contaminated with low concentrations of certain volatile, chlorinated, aliphatic compounds, such as trichloroethylene C2HCl3, tetrachloroethylene C2Cl4, carbon tetrachloride CCl4, and chloroform CHCl3. One aspect of this problem, about which very little is known, is that of the potential sorption of these chemicals in dilute aqueous systems by the soils comprising the groundwater aquifers, and by soils and soil components in general. This research was performed to expand our very limited knowledge in this area, and utilized 14C-labeled sorbates in conjunction with liquid scintillation counting. This investigation has shown that the above compounds are negligibly adsorbed by the inorganic solids clays and minerals which would typically comprise subsurface soils, with some evidence suggesting that they are slightly negatively adsorbed by these solids. Sorption and some desorption isotherms were determined for each sorbate with each of the following sorbents a mineral soil, a peat soil, a muck soil, activated carbon, graphite, humic acid, and lignin, The sorption equilibrium distribution coefficients K subscript d in the linear, low concentration regions of these isotherms were determined for each sorbent-sorbate system.

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE