+ Site Statistics
+ Search Articles
+ Subscribe to Site Feeds
Most Shared
PDF Full Text
+ PDF Full Text
Request PDF Full Text
+ Follow Us
Follow on Facebook
Follow on Twitter
Follow on LinkedIn
+ Translate
+ Recently Requested

TCE recovery mechanisms using micellar and alcohol solutions: phase diagrams and sand column experiments

TCE recovery mechanisms using micellar and alcohol solutions: phase diagrams and sand column experiments

Journal of Contaminant Hydrology 71(1-4): 155-192

Forty-one phase diagrams and fifteen sand column experiments were conducted to evaluate the efficiency of three types of washing solutions to recover trichloroethylene (TCE) at residual saturation and to identify the recovery mechanisms involved. This study demonstrates that: (1) an alcohol and a surfactant combination is more efficient than an alcohol used alone in water; (2) the prediction of the dominant recovery mechanism from the tie line slopes in phase diagram is accurate and can be reproduced in sand column experiments; and (3) TCE recovery efficiency in sand column experiments is generally well represented by the position of the miscibility curve in phase diagrams in the low concentration range. However, the miscibility curve alone is not sufficient to exactly predict the TCE recovery mechanisms involved. Tie line slopes and the critical tie line have to be taken into consideration to select the active matter as well as its concentration and to predict the dominant recovery mechanism in sand column experiments. The sand column experiments quantified the recovery efficiency of each solution and identified the proportion of the recovery mechanisms (mobilisation vs. solubilisation). Washing solutions with an active matter concentration above the critical tie line caused dominating mobilisation. Mobilisation was also dominant when the active matter of the washing solution partitioned into the organic phase and the active matter concentration was below the critical tie line. Solubilisation and emulsification were dominant for washing solutions containing active matter, which principally partitioned into the aqueous phase and an active matter concentration below the critical tie line.

(PDF emailed within 0-6 h: $19.90)

Accession: 004339963

Download citation: RISBibTeXText

PMID: 15145566

DOI: 10.1016/j.jconhyd.2003.09.010

Related references

Aquifer washing by micellar solutions: 2. DNAPL recovery mechanisms for an optimized alcohol-surfactant-solvent solution. Journal of Contaminant Hydrology 30(1-2): 1-31, 1998

Simulating the injection of micellar solutions to recover diesel in a sand column. Journal of Contaminant Hydrology 103(3-4): 99-108, 2008

Solubility limits and phase diagrams for fatty acids in anionic (SLES) and zwitterionic (CAPB) micellar surfactant solutions. Journal of Colloid and Interface Science 369(1): 274-286, 2012

Solubility limits and phase diagrams for fatty alcohols in anionic (SLES) and zwitterionic (CAPB) micellar surfactant solutions. Journal of Colloid and Interface Science 449: 46-61, 2014

Phase diagrams to optimize surfactant solutions for oil and DNAPL recovery in aquifers. Ground Water. 31(5): 789-800, 1993

Protein recovery from reversed micellar solutions through contact with a pressurized gas phase. Biotechnology Progress 7(1): 43-48, 1991

Investigation of virus attenuation mechanisms in a fluvioglacial sand using column experiments. Fems Microbiology Ecology 49(1): 83-95, 2009

Solubilization of nonaqueous phase liquid hydrocarbons in micellar solutions of dodecyl alcohol ethoxylates. Environmental Science and Technology 28(11): 1829-1837, 1994

Visualization of TCE recovery mechanisms using surfactant-polymer solutions in a two-dimensional heterogeneous sand model. Journal of Contaminant Hydrology 86(1-2): 3-31, 2006

Residual gasoline distribution and remediation; column experiments with Borden Sand, normal and alcohol-rich gasoline. Program with Abstracts - Geological Association of Canada(Mineralogical Association of Canada(Canadian Geophysical Union, Joint Annual Meeting 19: 6, 1994

Aquifer washing by micellar solutions: 1 Optimization of alcohol-surfactant-solvent solutions. Journal of Contaminant Hydrology 29(4): 319-346, 1998

Shape and position of 4-aminophthalimide (4-AP) time-resolved emission spectra (TRES) versus sodium dodecyl sulfate sds concentration in micellar solutions: the partitioning of 4-AP in the micellar phase and in water surrounding the micelles. Journal of Physical Chemistry. B 109(19): 9422-9431, 2006

Phase diagrams and kinetics of phase transitions in protein solutions. Journal of Physics. Condensed Matter 24(19): 193101, 2012

High-performance liquid chromatographic separation of inositol phosphate isomers employing a reversed-phase column and a micellar mobile phase. Journal of Chromatography 529(1): 65-80, 1990

Aquifer washing by micellar solutions 3 Field test at the Thouin Sand Pit. Journal of Contaminant Hydrology 30(1-2): 33-48, March 31, 1998