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Title: Phase behavior of chlorinated solvent + water + alcohol mixtures with application to alcohol flushing

Abstract

Alcohol flushing is a new in-situ remediation technique for the removal of water-immiscible solvents from contaminated soil and groundwater. Understanding the changes in the physical and chemical properties of chlorinated solvents and the aqueous-phase solution during flushing is prerequisite for the successful application of this technology. The overall objectives of these experiments were to characterize the ternary-phase behavior, interfacial tension, viscosity, and density for mixtures containing a chlorinated solvent, water and alcohol. Two chlorinated solvents were used: tetrachloroethylene and trichloroethylene. The alcohols studied included methanol, ethanol, and propan-2-ol. Results showed that the single-phase region of the ternary relationships increased as the molecular weight of the alcohol increased. The interfacial tension between the chlorinated solvents and aqueous solutions decreased with increasing alcohol concentration and increasing molecular weight of the alcohol. Changes in the viscosity of water + alcohol mixtures due to the addition of the solvents were only evident at high alcohol concentrations. Small changes in density were noted for the chlorinated solvents in equilibrium with water + alcohol solutions except in the case of trichloroethylene and propan-2-ol solutions, which exhibited considerable swelling.

Authors:
; ;  [1]
  1. Univ. of Vermont, Burlington, VT (United States). Dept. of Civil and Environmental Engineering
Publication Date:
OSTI Identifier:
697126
Resource Type:
Journal Article
Journal Name:
Journal of Chemical and Engineering Data
Additional Journal Information:
Journal Volume: 44; Journal Issue: 5; Other Information: PBD: Sep-Oct 1999
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; GROUND WATER; REMEDIAL ACTION; CHLORINATED ALIPHATIC HYDROCARBONS; ALCOHOLS; SOLVENT PROPERTIES; PHASE STUDIES; VISCOSITY; DENSITY; SURFACE TENSION

Citation Formats

Hayden, N.J., Diebold, J., and Noyes, G. Phase behavior of chlorinated solvent + water + alcohol mixtures with application to alcohol flushing. United States: N. p., 1999. Web. doi:10.1021/je980273y.
Hayden, N.J., Diebold, J., & Noyes, G. Phase behavior of chlorinated solvent + water + alcohol mixtures with application to alcohol flushing. United States. doi:10.1021/je980273y.
Hayden, N.J., Diebold, J., and Noyes, G. Wed . "Phase behavior of chlorinated solvent + water + alcohol mixtures with application to alcohol flushing". United States. doi:10.1021/je980273y.
@article{osti_697126,
title = {Phase behavior of chlorinated solvent + water + alcohol mixtures with application to alcohol flushing},
author = {Hayden, N.J. and Diebold, J. and Noyes, G.},
abstractNote = {Alcohol flushing is a new in-situ remediation technique for the removal of water-immiscible solvents from contaminated soil and groundwater. Understanding the changes in the physical and chemical properties of chlorinated solvents and the aqueous-phase solution during flushing is prerequisite for the successful application of this technology. The overall objectives of these experiments were to characterize the ternary-phase behavior, interfacial tension, viscosity, and density for mixtures containing a chlorinated solvent, water and alcohol. Two chlorinated solvents were used: tetrachloroethylene and trichloroethylene. The alcohols studied included methanol, ethanol, and propan-2-ol. Results showed that the single-phase region of the ternary relationships increased as the molecular weight of the alcohol increased. The interfacial tension between the chlorinated solvents and aqueous solutions decreased with increasing alcohol concentration and increasing molecular weight of the alcohol. Changes in the viscosity of water + alcohol mixtures due to the addition of the solvents were only evident at high alcohol concentrations. Small changes in density were noted for the chlorinated solvents in equilibrium with water + alcohol solutions except in the case of trichloroethylene and propan-2-ol solutions, which exhibited considerable swelling.},
doi = {10.1021/je980273y},
journal = {Journal of Chemical and Engineering Data},
number = 5,
volume = 44,
place = {United States},
year = {1999},
month = {9}
}