within a timeframe of 4 years. Large variation in the effect of ERD in the clay matrix between sites, boreholes and even between cores was observed. Four years post ERD initiation, the mass removal at the 2 sites varied between <5% and 50% within the treated zones. Low mass removal was associated with degradation being restricted to narrow bioactive zones (few cm) around high permeability features in some parts of the clay tills. The bioactive zones may expand in zones where both donor and chlorinated compounds are present. In some cores TCE was depleted (degraded to DCE) in zones up to 1.8 m thick – an extent which could not be explained by diffusive loss to narrow bioactive zones. Hence, biomass migration in the clay matrix appears to play an important role in terms of contaminant mass reduction.
|Number of pages||8|
|Publication status||Published - 2012|
|Event||International Conference on Advanced Environmental Science and Technology (AEST12) - Seoul, Korea, Republic of|
Duration: 26 Aug 2012 → 30 Aug 2012
|Conference||International Conference on Advanced Environmental Science and Technology (AEST12)|
|Country||Korea, Republic of|
|Period||26/08/2012 → 30/08/2012|