| Abstract: | Transport of a nonionic surfactant (Triton X-100) at aqueous concentrations less than 400 mg/L through a trichloroethene-contaminated sand-and-gravel aquifer at Picatinny Arsenal, NJ, has been studied through a series of laboratory and field experiments. In the laboratory, batch and column experiments were conducted to quantify the rate and amount of Triton X-100 sorption to the aquifer sediments. In the field, a 400 mg/L aqueous Triton X-100 solution was injected into the aquifer at a rate of 26.5 L/min for a 35-d period. The transport of Triton X-100 was monitored by sampling and analysis of groundwater at six locations surrounding the injection well. Equilibrium batch sorption experiments showed that Triton X-100 sorbs strongly and nonlinearly to the field soil with the sharpest inflection point of the isotherm occurring at an equilibrium aqueous Triton X-100 concentration close to critical micelle concentration. Batch, soil column, and field experimental data were analyzed with zero-, one-, and two- dimensional (respectively) transient solute transport models with either equilibrium or rate-limited sorption. These analyses reveal that Triton X- 100 sorption to the aquifer solids is slow relative to advective and dispersive transport and that an equilibrium sorption model cannot simulate accurately the observed soil column and field data. Comparison of kinetic sorption parameters from batch, column, and field transport data indicate that both physical heterogeneities and Triton X-100 mass transfer between water and soil contribute to the kinetic transport effects.Transport of a nonionic surfactant (Triton X-100) at aqueous concentrations less than 400 mg/L through a trichloroethene-contaminated sand-and-gravel aquifer was studied. Equilibrium batch sorption experiments showed that Triton X-100 sorbs strongly and nonlinearly to the field soil with the sharpest inflection point of the isotherm occurring at an equilibrium aqueous Triton X-100 concentration close to critical micelle concentration. Batch, soil column, and field experimental data were analyzed with zero-, one-, and two-dimensional transient solute transport models with either equilibrium or rate-limited sorption. These analyses revealed that Triton X-100 sorption to the aquifer solids was slow relative to advective and dispersive transport. |
| Genre: | Article |
| ProdID: | 70019316 |
| Citation Author: | Smith, J. A.; Sahoo, D.; Mclellan, H. M.; Imbrigiotta, T. E. |
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| Citation End Page: | 3572 |
| Citation Issue: | 12 |
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| Citation Language: | English |
| Citation Larger Work Title: | Environmental Science and Technology |
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| Citation Number Of Pages: | 8 |
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| Citation Publisher: | ACS |
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| Citation Search Results Text: | Surfactant-enhanced remediation of a trichloroethene-contaminated aquifer. 1. Transport of triton X-100; 1997; Article; Journal; Environmental Science and Technology; Smith, J. A.; Sahoo, D.; Mclellan, H. M.; Imbrigiotta, T. E. |
| Citation Start Page: | 3565 |
| Citation Volume: | 31 |
| Citation Year: | 1997 |
| Type: | citation/reference |
| Text: | Surfactant-enhanced remediation of a trichloroethene-contaminated aquifer. 1. Transport of triton X-100; 1997; Article; Journal; Environmental Science and Technology; Smith, J. A.; Sahoo, D.; Mclellan, H. M.; Imbrigiotta, T. E. |
| URL (THUMBNAIL): | http://pubs.er.usgs.gov/thumbnails/outside_thumb.jpg |
| URL (DIGITAL OBJECT IDENTIFIER): | http://dx.doi.org/10.1021/es970314v |
| Date Other: | Wed, 1 Jan 1997 00:00 -0600 |
| Publisher: | ACS |
