Institutional Repository
Technical University of Crete
Technical University of Crete
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| URI: | http://purl.tuc.gr/dl/dias/2CCFAFBE-816D-40D4-B10B-25D9C2BDC831 | ||
| Year | 2008 | ||
| Type of Item | Peer-Reviewed Journal Publication | ||
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| Bibliographic Citation | Hellerich L.A., N.P. Nikolaidis and G.M. Dobbs, "Evaluation of the potential for the natural attenuation of hexavalent chromium within a sub-wetland ground water" Journal of Environmental Management, Vol. 88, no. 4, pp. 1513-1524, Oct. 2008. DOI: 10.1016/j.jenvman.2007.07.032 https://doi.org/10.1016/j.jenvman.2007.07.032 | ||
| Appears in Collections |
In this work, the potential for natural attenuation (NA) of Cr(VI) is evaluated for sub-wetland ground water at a chromium-contaminated site in Connecticut, incorporating the experimental findings of previous work at the site. Experimental data is assessed through long-term attenuation capacity calculations and modeling, which incorporates statistical uncertainty of parametric values. The NA evaluation yielded the following results: (1) Significant increases in Cr(VI) concentration and extremely long chromium source dissolution timeframes are required to exceed the attenuation capacity of the sub-wetland region soils studied in this work; and (2) Based on the 1-D transport modeling and incorporating input parameter uncertainty, there is an approximately 92% and 98% probability that the applicable regulatory criteria will not be exceeded at Point C, near a river which serves as the receptor, for the cases of (1) sorption of Cr(VI) only and (2) pseudo first order disappearance of Cr(VI) from the aqueous phase only, respectively.
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