Analytical method for optimal source reduction with monitored natural attenuation in contaminated aquifers
By: M.A. Widdowson, F. H. Chapelle, and J.S. Brauner
Edited by: Mishra S.Mishra S.
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Abstract
A method is developed for optimizing monitored natural attenuation (MNA) and the reduction in the aqueous source zone concentration (??C) required to meet a site-specific regulatory target concentration. The mathematical model consists of two one-dimensional equations of mass balance for the aqueous phase contaminant, to coincide with up to two distinct zones of transformation, and appropriate boundary and intermediate conditions. The solution is written in terms of zone-dependent Peclet and Damko??hler numbers. The model is illustrated at a chlorinated solvent site where MNA was implemented following source treatment using in-situ chemical oxidation. The results demonstrate that by not taking into account a variable natural attenuation capacity (NAC), a lower target ??C is predicted, resulting in unnecessary source concentration reduction and cost with little benefit to achieving site-specific remediation goals.
Suggested Citation
Widdowson, M., Chapelle, F.H., Brauner, J., 2003, Analytical method for optimal source reduction with monitored natural attenuation in contaminated aquifers, in Groundwater Quality Modeling and Management Under Uncertinity, Philadelphia, PH, 23 June 2003 through 25 June 2003, p. 172-178.
| Publication type | Conference Paper |
|---|---|
| Publication Subtype | Conference Paper |
| Title | Analytical method for optimal source reduction with monitored natural attenuation in contaminated aquifers |
| ISBN | 0784406960 |
| Year Published | 2003 |
| Language | English |
| Larger Work Title | Groundwater Quality Modeling and Management Under Uncertinity |
| First page | 172 |
| Last page | 178 |
| Conference Title | Proceeding of the Symposium on Groundwater Management Under Uncertainty |
| Conference Location | Philadelphia, PH |
| Conference Date | 23 June 2003 through 25 June 2003 |