+ 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

Aquifer washing by micellar solutions 3 Field test at the Thouin Sand Pit

Aquifer washing by micellar solutions 3 Field test at the Thouin Sand Pit

Journal of Contaminant Hydrology 30(1-2): 33-48, March 31

A field test was performed to recover DNAPL (Dense Non Aqueous Phase Liquid) in a shallow aquifer at the Thouin Sand Pit near Montreal, to evaluate a new technique of aquifer restoration involving surfactant solutions. Laboratory tests have shown that washing solutions containing alcohols, surfactants, and solvents are very efficient in recovering DNAPL as a miscible phase. The Thouin field test was designed to: (1) study in situ recovery of DNAPL; (2) evaluate an injection-pumping strategy; (3) test the use of polymer solutions to control the mobility of a washing solution slug and to improve the vertical sweep efficiency throughout the sand unit. The test was performed in a shallow medium sand aquifer containing both contaminated saturated and unsaturated zones. The washing experiment was done on 17 m3 of the saturated zone with an average DNAPL initial concentration of 55 000 mg kg-1 dry soil. Solutions were injected through a central well and pumped into four wells arranged in a five-point square pattern. In the zone swept by the washing solution, 86% of residual DNAPL was recovered using only 0.9 pore volume of a surfactant solution. These results confirm laboratory sand column experiments although the washing solution used in the field experiment had not yet been optimized to meet site-specific criteria. The use of a polymer solution before and after injection of the washing solution proved beneficial in insuring that the washing solution effectively swept all the sand layers in spite of soil heterogeneities. As the rinsing cycles were not completed because of weather problems (freezing conditions), small but significant amounts of the washing solution ingredients were still present in the aquifer at the end of the test and their fate is being monitored. For this field test, DNAPL recovery could have been better if an optimal washing solution had been injected, a larger volume of the selected solution had been circulated, or a different injection-pumping strategy had been chosen.

(PDF emailed within 1 workday: $29.90)

Accession: 030163199

Download citation: RISBibTeXText

Related references

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

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

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

Field pilot test of surfactant-enhanced remediation of trichloroethene DNAPL in a sand aquifer. Ground Water 32(5): 852-853, 1994

Field-scale tracer test in a shallow, sand and gravel aquifer contaminant with a complex LNAPL. Eos, Transactions, American Geophysical Union: 4, Suppl., Pages 252. 1994., 1994

Evaluation of a stream aquifer analysis test using analytical solutions and field data. Journal of the American Water Resources Association 40(3): 755-763, 2004

Preliminary type-curve analysis of an aquifer test in an unconfined sand and gravel aquifer, Cape Cod, Massachusetts. Water-Resources Investigations - U S, 1996

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

TCE recovery mechanisms using micellar and alcohol solutions: phase diagrams and sand column experiments. Journal of Contaminant Hydrology 71(1-4): 155-192, 2004

Simulating the process of the regeneration of washing solutions and washing disinfecting solutions. Izvestiya Timiryazevskoi Sel'skokhozyaistvennoi Akademii (5): 175-181, 1991

Aquifer test in a sand plain at Bothwell, Ontario. Geol Assoc, 1968

Evaluation of washing solutions--cleaning test tubes by simple immersion. Rinsho Byori. Japanese Journal of Clinical Pathology 26(7): 559-564, 1978

Development of new aquifer test method and its application to granite and sand stone. Tsuchi-To-Kiso JSSMFE = Soil Mechanics and Foundation Engineering 37(7): 47-52, 1989

Viral transport in a sand and gravel aquifer under field pumping conditions. Ground Water 39(6): 886-894, 2001

GEMSTRAC1; an induced gradient tracer test in an alluvial sand and gravel aquifer. International Union of Geodesy and Geophysics General Assembly = Union Geodesique et Geophysique Internationale Comptes Rendus de la, 1995