Evaluation of volatilization by organic chemicals residing below the soil surface

Journal Article · Mon Jan 01 04:00:00 EST 1990 · Water Resources Research; (USA)

DOI:https://doi.org/10.1029/WR026i001p00013· OSTI ID:6536021

Jury, W A ^[1]; Russo, D ^[2]; Streile, G ^[3]; El Abd, H ^[4]

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1. Univ. of California, Riverside (USA)
2. Institute of Soils and Water, Bet Dagan (Israel)
3. Battelle Pacific Northwest, Richland, WA (USA)
4. Atomic Energy Institute, Cairo (Egypt)

Although volatile organic compounds located in buried waste repositories or distributed through the unsaturated soil zone have the potential to migrate to the atmosphere by vapor diffusion, little attention has been paid in the past to estimating the importance of volatilization losses. In this paper a screening model is introduced which evaluates the relative volatilization losses of a number of organic compounds under standard soil conditions. The model is an analytic solution to the problem wherein the organic chemical is located at time zero at uniform concentration in a finite layer of soil covered by a layer of soil devoid of chemical. The compound is assumed to move by vapor or liquid diffusion and by mass flow under the influence of steady upward or zero water flow while undergoing first-order degradation and linear equilibrium adsorption. Loss to the atmosphere is governed by vapor diffusion and by mass flow under the influence of steady upward or zero water flow while undergoing first-order degradation and linear equilibrium adsorption. Loss to the atmosphere is governed by vapor diffusion through a stagnant air boundary layer. Calculations are performed on 35 organic compounds in two model soils with properties characteristic of sandy and clayey soil. The model identifies those compounds with high potential for loss during 1 year after incorporation under 100 cm of soil cover and also is used to calculate the minimum soil cover thickness required to reduce volatilization losses to insignificant levels during the lifetime of the compound in the soil. From the latter calculation it was determined that certain compounds may volatilize from deep subsurface locations or even groundwater unless the soil surface is sealed to prevent gas migration.

• OSTI ID: 6536021
• Journal Information: Water Resources Research; (USA), Journal Name: Water Resources Research; (USA) Vol. 26:1; ISSN 0043-1397; ISSN WRERA
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
540220* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (1990-)
540320 -- Environment
Aquatic-- Chemicals Monitoring & Transport-- (1990-)
CONTAMINATION
ENVIRONMENTAL TRANSPORT
FLOW MODELS
FLUID FLOW
GAS FLOW
GROUND WATER
HYDROGEN COMPOUNDS
LAND POLLUTION
LEAKS
MANAGEMENT
MASS TRANSFER
MATHEMATICAL MODELS
MATTER
ORGANIC COMPOUNDS
OXYGEN COMPOUNDS
POLLUTION
SOILS
UNDERGROUND DISPOSAL
VOLATILE MATTER
VOLATILITY
WASTE DISPOSAL
WASTE MANAGEMENT
WATER
WATER POLLUTION