Abstract
Groundwater contaminations by VOCs (Volatile Organic compounds) are searched in many sites. These contamination are spread in both saturated zone and unsaturated zone. In these cases, mass transport is very important between these two zones, because the volatilization of VOCs from groundwater and the subsequence process are same mechanism on groundwater contamination.In this paper, the mechanism of VOCs transport in subsurface and these processes are discussed. Two types of experiments are carried out. One is the evaluation of the transport of VOCs in saturatedunsaturated zone under a soil moisture profile. Other is the estimation of the transport of VOCs under the oscillating water table condition. And a numerical model, considered with mass transfer on the interface, is applied to both saturated zone and unsaturated zone. This simulation agrees qualitatively with experimental results.
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