Analytical models were developed that simulate stable isotope ratios of volatile organic compounds (VOCs) near a point source contamination in the unsaturated zone. The models describe diffusive transport of VOCs, biodegradation and source ageing. The mass transport is governed by Fick's law for diffusion. The equation for reactive transport of VOCs in the soil gas phase was solved for differen...

MILLENNIAL-SCALE CLIMATE VARIABILITY: THE REPLICABILITY OF MARINE RECORDS SHACKLETON, Nicholas J.1, DE ABREU, Lucia2, BLUMBACH, Petya1, CHESHIRE, Heather1, VAUTRAVERS, Maryline2, GRIMALT, Joan3, MARTRAT, Belen4, THOUVENY, Nicolas5, and THOMAS, Lucy6, (1) Godwin Laboratory for Quaternary Studies, Cambridge Univ, Cambridge, CB2 3SA, United Kingdom, [email protected], (2) Godwin Laboratory, Univ of C...

Carbon isotope fractionation during aerobic mineralization of 1, 2-dichloroethane (1,2-DCA) by Xanthobacter autotrophicus GJ10 was investigated. A strong enrichment of (13)C in residual 1,2-DCA was observed, with a mean fractionation factor alpha +/- standard deviation of 0.968 +/- 0.0013 to 0.973 +/- 0.0015. In addition, a large carbon isotope fractionation between biomass and inorganic carbon...