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Title: Ground-water contaminant plume differentiation and source determination using BTEX concentration ratios

Abstract

Concentration ratios of benzene, toluene, ethylbenzene, and xylenes (BTEX) in ground water can be used for ground-water contaminant plume differentiation and source determination. Computer modeling utilizing BTEX soil-water partitioning coefficients and biodegradation rates shows that hydraulic dispersion, retardation, and biodegradation do not significantly modify the BTEX concentration ratios in ground water, particularly those of ethylbenzene and xylenes. Therefore, the BTEX concentration ratios are similar in the contaminant plumes that are derived from a common source or sources of similar BTEX compositions. In the vadose zone, the BTEX concentration ratios in downward-migrating contaminant free-product remain essentially unchanged because of the dynamic nature of soil adsorption and restricted natural soil ventilation. The only significant change in the BTEX concentration ratios occurs in the partitioning between ground water and contaminant free-product as the result of differential BTEX solubilities in water. In the partitioning, benzene/toluene and toluene/ethylbenzene concentration ratios of ground water are 3.6 and 3.3 times greater respectively than the ratios at the source, while the ratios of ethylbenzene and xylenes remain unchanged. The geochemical methods were successfully applied and tested at two sites where multiple ground-water contaminant plumes from different sources were superimposed. The conclusions of geochemical analysis are consistent with themore » site-specific hydraulic characteristics and facility operation histories.« less

Authors:
; ; ;  [1]
  1. T.M. Gates Inc., Milford, OH (United States)
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
128861
Resource Type:
Journal Article
Journal Name:
Ground Water
Additional Journal Information:
Journal Volume: 33; Journal Issue: 6; Other Information: PBD: Nov-Dec 1995
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; GROUND WATER; WATER POLLUTION; BENZENE; POLLUTION SOURCES; ENVIRONMENTAL TRANSPORT; ALKYLATED AROMATICS; HYDRAULIC CONDUCTIVITY; TOLUENE; XYLENES; GEOCHEMISTRY; MATHEMATICAL MODELS; ECOLOGICAL CONCENTRATION

Citation Formats

Yang, Y J, Spencer, R D, Mersmann, M A, and Gates, T M. Ground-water contaminant plume differentiation and source determination using BTEX concentration ratios. United States: N. p., 1995. Web. doi:10.1111/j.1745-6584.1995.tb00038.x.
Yang, Y J, Spencer, R D, Mersmann, M A, & Gates, T M. Ground-water contaminant plume differentiation and source determination using BTEX concentration ratios. United States. https://doi.org/10.1111/j.1745-6584.1995.tb00038.x
Yang, Y J, Spencer, R D, Mersmann, M A, and Gates, T M. Wed . "Ground-water contaminant plume differentiation and source determination using BTEX concentration ratios". United States. https://doi.org/10.1111/j.1745-6584.1995.tb00038.x.
@article{osti_128861,
title = {Ground-water contaminant plume differentiation and source determination using BTEX concentration ratios},
author = {Yang, Y J and Spencer, R D and Mersmann, M A and Gates, T M},
abstractNote = {Concentration ratios of benzene, toluene, ethylbenzene, and xylenes (BTEX) in ground water can be used for ground-water contaminant plume differentiation and source determination. Computer modeling utilizing BTEX soil-water partitioning coefficients and biodegradation rates shows that hydraulic dispersion, retardation, and biodegradation do not significantly modify the BTEX concentration ratios in ground water, particularly those of ethylbenzene and xylenes. Therefore, the BTEX concentration ratios are similar in the contaminant plumes that are derived from a common source or sources of similar BTEX compositions. In the vadose zone, the BTEX concentration ratios in downward-migrating contaminant free-product remain essentially unchanged because of the dynamic nature of soil adsorption and restricted natural soil ventilation. The only significant change in the BTEX concentration ratios occurs in the partitioning between ground water and contaminant free-product as the result of differential BTEX solubilities in water. In the partitioning, benzene/toluene and toluene/ethylbenzene concentration ratios of ground water are 3.6 and 3.3 times greater respectively than the ratios at the source, while the ratios of ethylbenzene and xylenes remain unchanged. The geochemical methods were successfully applied and tested at two sites where multiple ground-water contaminant plumes from different sources were superimposed. The conclusions of geochemical analysis are consistent with the site-specific hydraulic characteristics and facility operation histories.},
doi = {10.1111/j.1745-6584.1995.tb00038.x},
url = {https://www.osti.gov/biblio/128861}, journal = {Ground Water},
number = 6,
volume = 33,
place = {United States},
year = {1995},
month = {11}
}