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20231223140604.0 |
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231223s2007 xx ||||| 00| ||eng c |
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|a pubmed24n0583.xml
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|a (DE-627)NLM174740506
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|a (NLM)17973747
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|a DE-627
|b ger
|c DE-627
|e rakwb
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| 041 |
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|a eng
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| 100 |
1 |
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|a Mundle, Keely
|e verfasserin
|4 aut
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| 245 |
1 |
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|a Concentration rebound following in situ chemical oxidation in fractured clay
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| 264 |
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1 |
|c 2007
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| 336 |
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|a Text
|b txt
|2 rdacontent
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| 337 |
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|a ohne Hilfsmittel zu benutzen
|b n
|2 rdamedia
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| 338 |
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|a Band
|b nc
|2 rdacarrier
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| 500 |
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|a Date Completed 05.02.2008
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|a Date Revised 01.12.2018
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|a published: Print
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|a Citation Status MEDLINE
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| 520 |
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|a A two-dimensional, transient-flow, and transport numerical model was developed to simulate in situ chemical oxidation (ISCO) of trichloroethylene and tetrachloroethylene by potassium permanganate in fractured clay. This computer model incorporates dense, nonaqueous phase liquid dissolution, reactive aquifer material, multispecies matrix diffusion, and kinetic formulations for the oxidation reactions. A sensitivity analysis for two types of parameters, hydrogeological and engineering, including matrix porosity, matrix organic carbon, fracture aperture, potassium permanganate dosage, and hydraulic gradient, was conducted. Remediation metrics investigated were the relative rebound concentrations arising from back diffusion and percent mass destroyed. No well-defined correlation was found between the magnitude of rebound concentrations during postremedy monitoring and the amount of contaminant mass destroyed during the application. Results indicate that all investigated parameters affect ISCO remediation in some form. Results indicate that when advective transport through the fracture is dominant relative to diffusive transport into the clay matrix (large System Peclet Number), permanganate is more likely to be flushed out of the system and treatment is not optimal. If the System Peclet Number is too small, indicating that diffusion into the matrix is dominant relative to advection through the fracture, permanganate does not traverse the entire fracture, leading to postremediation concentration rebound. Optimal application of ISCO requires balancing advective transport through the fracture with diffusive transport into the clay matrix
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| 650 |
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4 |
|a Journal Article
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| 650 |
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4 |
|a Research Support, Non-U.S. Gov't
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| 650 |
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4 |
|a Research Support, U.S. Gov't, Non-P.H.S.
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| 650 |
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7 |
|a Aluminum Silicates
|2 NLM
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| 650 |
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7 |
|a Water Pollutants, Chemical
|2 NLM
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| 650 |
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7 |
|a Trichloroethylene
|2 NLM
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| 650 |
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7 |
|a 290YE8AR51
|2 NLM
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| 650 |
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7 |
|a Clay
|2 NLM
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| 650 |
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7 |
|a T1FAD4SS2M
|2 NLM
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| 700 |
1 |
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|a Reynolds, David A
|e verfasserin
|4 aut
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| 700 |
1 |
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|a West, Michael R
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Kueper, Bernard H
|e verfasserin
|4 aut
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| 773 |
0 |
8 |
|i Enthalten in
|t Ground water
|d 1979
|g 45(2007), 6 vom: 01. Nov., Seite 692-702
|w (DE-627)NLM098182528
|x 1745-6584
|7 nnns
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| 773 |
1 |
8 |
|g volume:45
|g year:2007
|g number:6
|g day:01
|g month:11
|g pages:692-702
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| 912 |
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|d 45
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|h 692-702
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