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Title: DESORPTION BEHAVIOR OF TRICHLOROETHENE AND TETRACHLOROETHENE IN U.S. DEPARTMENT OF ENERGY SAVANNAH RIVER SITE UNCONFINED AQUIFER SEDIMENTS

Abstract

Sorption is governed by the physico-chemical processes that partition solutes between the aqueous and solid phases in aquifers. For environmental systems, a linear equilibrium relationship between the amount of contaminant in the alternative phases is often assumed. In this traditional approach, the distribution coefficient, or K{sub d}, is a ratio of contaminant associated with the solid phase to the contaminant in the water phase. Recent scientific literature has documented time-dependant behaviors in which more contaminant mass is held in the solid phase than predicted by the standard model. Depending on the specific conceptualization, this has been referred to as nonlinear sorption, time-variable sorption, or ''irreversible sorption''. The potential impact of time-variable sorption may be beneficial or detrimental depending on the specific conditions and remediation goals. Researchers at the Pacific Northwest National Laboratory (PNNL) have been studying this process to evaluate how various soil types will affect this process for sites contaminated with chlorinated solvents. The results described in this report evaluate sorption-desorption of trichloroethylene (TCE) and tetrachloroethylene (PCE) in Savannah River Site (SRS) soils. The results of this study will be combined with ongoing PNNL research to provide a more comprehensive look at this process and its impact on contaminantmore » plume stability and sustainability. Importantly, while the results of the study documented differences in sorption properties between two tested SRS soils, the data indicated that ''irreversible sorption'' is not influencing the sorption-desorption behaviors of TCE and PCE for these soils.« less

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
SRS
Sponsoring Org.:
USDOE
OSTI Identifier:
899958
Report Number(s):
WSRC-STI-2006-00339
TRN: US0702204
DOE Contract Number:
DE-AC09-96SR18500
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS; AQUIFERS; DESORPTION; DISTRIBUTION; PLUMES; SEDIMENTS; SOILS; SOLUTES; SOLVENTS; SORPTION; STABILITY; STANDARD MODEL; WATER

Citation Formats

Vangelas, K, Robert G. Riley, R, James E. Szecsody, J, A. V. Mitroshkov, A, C. F. Brown, C, and Brian02 Looney, B. DESORPTION BEHAVIOR OF TRICHLOROETHENE AND TETRACHLOROETHENE IN U.S. DEPARTMENT OF ENERGY SAVANNAH RIVER SITE UNCONFINED AQUIFER SEDIMENTS. United States: N. p., 2007. Web. doi:10.2172/899958.
Vangelas, K, Robert G. Riley, R, James E. Szecsody, J, A. V. Mitroshkov, A, C. F. Brown, C, & Brian02 Looney, B. DESORPTION BEHAVIOR OF TRICHLOROETHENE AND TETRACHLOROETHENE IN U.S. DEPARTMENT OF ENERGY SAVANNAH RIVER SITE UNCONFINED AQUIFER SEDIMENTS. United States. doi:10.2172/899958.
Vangelas, K, Robert G. Riley, R, James E. Szecsody, J, A. V. Mitroshkov, A, C. F. Brown, C, and Brian02 Looney, B. Wed . "DESORPTION BEHAVIOR OF TRICHLOROETHENE AND TETRACHLOROETHENE IN U.S. DEPARTMENT OF ENERGY SAVANNAH RIVER SITE UNCONFINED AQUIFER SEDIMENTS". United States. doi:10.2172/899958. https://www.osti.gov/servlets/purl/899958.
@article{osti_899958,
title = {DESORPTION BEHAVIOR OF TRICHLOROETHENE AND TETRACHLOROETHENE IN U.S. DEPARTMENT OF ENERGY SAVANNAH RIVER SITE UNCONFINED AQUIFER SEDIMENTS},
author = {Vangelas, K and Robert G. Riley, R and James E. Szecsody, J and A. V. Mitroshkov, A and C. F. Brown, C and Brian02 Looney, B},
abstractNote = {Sorption is governed by the physico-chemical processes that partition solutes between the aqueous and solid phases in aquifers. For environmental systems, a linear equilibrium relationship between the amount of contaminant in the alternative phases is often assumed. In this traditional approach, the distribution coefficient, or K{sub d}, is a ratio of contaminant associated with the solid phase to the contaminant in the water phase. Recent scientific literature has documented time-dependant behaviors in which more contaminant mass is held in the solid phase than predicted by the standard model. Depending on the specific conceptualization, this has been referred to as nonlinear sorption, time-variable sorption, or ''irreversible sorption''. The potential impact of time-variable sorption may be beneficial or detrimental depending on the specific conditions and remediation goals. Researchers at the Pacific Northwest National Laboratory (PNNL) have been studying this process to evaluate how various soil types will affect this process for sites contaminated with chlorinated solvents. The results described in this report evaluate sorption-desorption of trichloroethylene (TCE) and tetrachloroethylene (PCE) in Savannah River Site (SRS) soils. The results of this study will be combined with ongoing PNNL research to provide a more comprehensive look at this process and its impact on contaminant plume stability and sustainability. Importantly, while the results of the study documented differences in sorption properties between two tested SRS soils, the data indicated that ''irreversible sorption'' is not influencing the sorption-desorption behaviors of TCE and PCE for these soils.},
doi = {10.2172/899958},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Jan 10 00:00:00 EST 2007},
month = {Wed Jan 10 00:00:00 EST 2007}
}

Technical Report:

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  • The DOE Savannah River Site (SRS) is evaluating the potential applicability of the monitored natural attenuation (MNA) process as a contributor to the understanding of the restoration of its unconfined groundwater aquifer known to be contaminated with the chlorinated hydrocarbon compounds trichloroethylene (TCE) and tetrachloroethylene (PCE). This report discusses the results from aqueous desorption experiments on SRS aquifer sediments from two different locations at the SRS (A/M Area; P-Area) with the objective of providing technically defensible TCE/PCE distribution coefficient (Kd) data and data on TCE/PCE reversible and irreversible sorption behavior needed for further MNA evaluation.
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  • As part of the Department of Energy`s (DOE) Epidemiologic Records Inventory Project, History Associates Incorporated (HAI) prepared this guide to the records series pertaining to health protection activities at the DOE`s Savannah River Site (SRS). Since its inception in the early 1950s, the SRS, formerly known as the Savannah River Plant (SRP), has demonstrated significant interest in safeguarding facilities, protecting employees` health, and monitoring the environment. The guide describes records that concern health protection program administration, radiological monitoring of the plant and the environment, calibration and maintenance of monitoring instruments, internal and external dosimetry practices, medical surveillance of employees, occupationalmore » safety and training measures, site visitation, and electronic information systems. The introduction to the guide describes the Epidemiologic Records Inventory Project and HAI`s role in the project. It provides brief histories of the DOE, SRS, and the SRS organizational units responsible for health protection activities. This introduction also summarizes HAI`s methodology in developing criteria and conducting its verification of the SRS inventory of active and inactive SRS Health Protection records. Furthermore, it furnishes information on the production of the guide, the content of the records series descriptions, the location of the records, and the procedures for accessing records repositories.« less