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biological reaction <br /> ------♦ abiotic reaction Hexachloroethane \ <br /> (HCA) <br /> See Figure <br /> chlorinated iotic <br /> ethente degradaonpath ays dechlorination 8 Ab,Ot'\OPchlorr\arron a p r <br /> 6 <br /> "unclear if biotic or abiotic <br /> Pentachloroethane <br /> (PCA) — — — — — — _ dehydrochlorination 8 A, <br /> — — — Tetrachloroethene <br /> reductive � � — � <br /> dechlorination (PCE)' <br /> 1,1,1,2-Tetrachloroethane 1,1,2,2-Tetrachloroethane <br /> ,1 -Tdbe�h/Oi <br /> ,1,2eCA) Trnato s <br /> dechloreductrination \ reductive \ deh °nnat�°h r•3 <br /> \96 dechlorination aPh d1°ch/O 4 8 <br /> Q' \°C• � yd�o \ � r�ndti <br /> Trichloroethene <br /> 1,1,1-Trichloroethane \ e �� 1,1,2-Trichloroethane a+i° (TCE)* <br /> (1,1,1 TCA) �o ° �3 <br /> \^. (1,1,2-TCA) <br /> od 3d Ss Sa <br /> reductive trans-1,2- <br /> I echlorination °j'�a� Dichloroethene cis-1,2-Dichloroethene <br /> \ + /° �O� (trans-l,2-DCE)* (cis 1,2-DCE)* <br /> 1U <br /> 1,1-Dichloroethane 1,1-Dichloroethene /,�` 1,2 Dichloroethane <br /> (1,1-DCA) (1,1-DCE)* ;ate (1,2-DCA) deh <br /> '0, aha/ dr�.hlOrrnati° z 3 <br /> References aPch0 n 'S <br /> o� reductive <br /> Dari Vinyl Chloride <br /> 1.Chen eta].(1996) dechlore0 <br /> '��3 (VC)* <br /> 2.Hunkeler et al.(2002) _ s� <br /> 3.Hunkeler et al.(2005) <br /> 4.Bouwer and McCarty(1983) Chloroethane m 'S <br /> 7 <br /> 5.Arnold et al.(2002) (CA) <br /> 6.De Wildeman et al.(2003) of °�N�D Ethene* <br /> 7.Holliger et al.(1990) reductive y 'n <br /> 8.Butler and Hayes(2000) dechlorination r'o7 <br /> 9.Vogel and McCarty(1987) 7 <br /> 10.Bouwer and Wright(1988) Ethane <br /> 11.Gregory et al.(2000) CO2 <br /> 12.Gerritse et al.(1999) <br /> 13.Cox et al.(1998) <br /> 14.Cox et al.(2000) <br /> 15.Dyer et al.(2000) Figure 1.4: Pathways for the Anaerobic <br /> 16.Buller and Hayes(1998) Degradation of Chlorinated Ethanes <br /> a <br /> 1-13 <br />