000000330 001__ 330
000000330 005__ 20260312084041.0
000000330 0247_ $$2DOI$$a10.6083/M4707ZDM
000000330 037__ $$aETD
000000330 245__ $$aEngineered remediation and natural attenuation of halogenated alkanes (carbon tetrachloride and 1,2,3-trichloropropane) a study of contaminant reactivity and reductant morphology
000000330 260__ $$bOregon Health and Science University
000000330 269__ $$a2008
000000330 336__ $$aDissertation
000000330 502__ $$bPh.D.
000000330 520__ $$aCarbon tetrachloride (CT) and 1,2,3‑trichloropropane (TCP), two chlorinated aliphatic contaminants with contrasting reactivities, were investigated across multiple abiotic degradation pathways. Batch experiments showed that CT reduction by zero‑valent iron (Fe⁰) proceeds primarily via hydrogenolysis to chloroform, with yields strongly influenced by iron surface composition. Magnetite‑containing surfaces and nano‑Fe⁰ with a magnetite shell promoted alternative reduction pathways that reduced chloroform formation. Aging studies of nano‑Fe⁰ demonstrated rapid surface transformation to mixed‑valence iron oxides. In contrast, TCP exhibited limited reactivity under reductive conditions but degraded more effectively via oxidative pathways, particularly activated persulfate, which achieved rapid and complete dechlorination. These results highlight the importance of reaction pathway selection for effective remediation of chlorinated contaminants.
000000330 540__ $$fCC BY
000000330 542__ $$fIn copyright - single owner
000000330 650__ $$aKinetics$$021214
000000330 650__ $$aCarbon Tetrachloride$$016087
000000330 650__ $$aAging$$014358
000000330 650__ $$aIron$$021036
000000330 650__ $$aGroundwater$$039774
000000330 650__ $$aTrichloroepoxypropane$$027335
000000330 6531_ $$apollution
000000330 6531_ $$ayield of chloroform
000000330 6531_ $$anano
000000330 6531_ $$aremediation
000000330 6531_ $$achemical kinetics
000000330 6531_ $$aaliphatic compounds
000000330 6531_ $$aproduct branching
000000330 691__ $$aOGI School of Science and Engineering$$041365
000000330 692__ $$aDepartment of Environmental and Biomolecular Systems$$041414
000000330 7001_ $$aSarathy, Vaishnavi$$uOregon Health and Science University$$041354
000000330 7201_ $$aTratnyek, Paul$$uOregon Health and Science University$$041354$$7Personal$$eAdvisor
000000330 8564_ $$9f585c0e9-47f4-42b8-84a7-858816a15bda$$s1813077$$uhttps://digitalcollections.ohsu.edu/record/330/files/331_etd.pdf$$ePublic$$2b766b6640c3c53323719097d2dece5b5$$31
000000330 905__ $$a/rest/prod/z0/29/p4/73/z029p4736
000000330 909CO $$ooai:digitalcollections.ohsu.edu:330$$pstudent-work
000000330 956__ $$aGet Accessible Copy$$uhttps://ohsu.libwizard.com/f/requestaccessibledocument
000000330 980__ $$aTheses and Dissertations