{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,28]],"date-time":"2025-10-28T14:47:30Z","timestamp":1761662850530,"version":"build-2065373602"},"reference-count":34,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2001,7,1]],"date-time":"2001-07-01T00:00:00Z","timestamp":993945600000},"content-version":"vor","delay-in-days":181,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["acsess.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J of Env Quality"],"published-print":{"date-parts":[[2001,1]]},"abstract":"<jats:title>ABSTRACT<\/jats:title><jats:p>Chemical and biological transformations can significantly affect contaminant transport in the subsurface. To better understand such transformation reactions, an equilibrium\u2013nonequilibrium sorption transport model, HYDRUS\u20101D, was modified by including inverse solutions for multiple breakthrough curves resulting from the transport of solutes undergoing sequential transformations. The inverse solutions were applied to miscible\u2010displacement experiments involving dissolved concentrations of trichloroethylene (TCE) undergoing reduction and\/or transformations in the presence of zero\u2010valent metal porous media (i.e., iron or copper\u2010coated iron filings) to produce ethylene. The inverse model solutions provided a reasonable description of the transport and transformation processes. Simultaneous fitting of multiple breakthrough curves of TCE and ethylene placed additional constraints on the inverse solution and improved the reliability of parameter estimates. Confidence intervals of optimized parameters were reduced significantly in comparison with those obtained by fitting TCE breakthrough curves independently. Further evidence for accurate parameter estimates was given when the parameter values agreed with previously reported values from independent batch and degradation experiments. Optimized values of the normalized degradation rates for the equilibrium (1.4 \u00d7 10<jats:sup>\u22124<\/jats:sup> to 7.2 \u00d7 10<jats:sup>\u22125<\/jats:sup> L h<jats:sup>\u22121<\/jats:sup> m<jats:sup>\u22122<\/jats:sup>) and nonequilibrium (1.2 \u00d7 10<jats:sup>\u22124<\/jats:sup> to 5.5 \u00d7 10<jats:sup>\u22125<\/jats:sup> L h<jats:sup>\u22121<\/jats:sup> m<jats:sup>\u22122<\/jats:sup>) models compared well with values (0.03 to 6.5 \u00d7 10<jats:sup>\u22125<\/jats:sup> L h<jats:sup>\u22121<\/jats:sup> m<jats:sup>\u22122<\/jats:sup>) obtained from previous studies. The estimated TCE\u2013iron sorption coefficients (0.52 to 2.85 L kg<jats:sup>\u22121<\/jats:sup>) were also consistent with a previously reported value (1.47 L kg<jats:sup>\u22121<\/jats:sup>).<\/jats:p>","DOI":"10.2134\/jeq2001.3041354x","type":"journal-article","created":{"date-parts":[[2010,6,14]],"date-time":"2010-06-14T03:18:03Z","timestamp":1276485483000},"page":"1354-1360","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":17,"title":["Inverse Analyses of Transport of Chlorinated Hydrocarbons Subject to Sequential Transformation Reactions"],"prefix":"10.1002","volume":"30","author":[{"given":"Francis X.M.","family":"Casey","sequence":"first","affiliation":[{"name":"Dep. of Soil Science North Dakota State Univ. Fargo ND 58105"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Ji\u0159\u00ed","family":"\u0160im\u016fnek","sequence":"additional","affiliation":[{"name":"George E. Brown Jr. Salinity Lab. USDA\u2010ARS Riverside CA 92507"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2001,7]]},"reference":[{"key":"e_1_2_6_2_1","doi-asserted-by":"publisher","DOI":"10.1021\/es962526i"},{"volume-title":"Dynamics of fluids in porous media","year":"1972","author":"Bear J.","key":"e_1_2_6_3_1"},{"key":"e_1_2_6_4_1","doi-asserted-by":"publisher","DOI":"10.1021\/ja01269a023"},{"key":"e_1_2_6_5_1","doi-asserted-by":"publisher","DOI":"10.1061\/(ASCE)0733-9372(1998)124:10(1012)"},{"key":"e_1_2_6_6_1","doi-asserted-by":"publisher","DOI":"10.1021\/es00011a022"},{"key":"e_1_2_6_7_1","unstructured":"Burt T.A.1999.Percholoroethylene and chromate sorption\/reduction using a surfactant\u2010modified zeolite\/zero valent iron pellet. M.S. thesis. New Mexico Inst. of Mining Technol. 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