An analytical quantification of mass fluxes and natural attenuation rate constants at a former gasworks site

摘要

A new integral groundwater investigation approach was used for the first time to quantify natural attenuation rates at field scale. In this approach, pumping wells positioned along two control planes were operated at distances of 140 and 280 m downstream of a contaminant source zone at a former gasworks site polluted with BTEX-(benzene, toluene, ethyl-benzene, o-, p-xylene)and PAH-(polycyclic aromatic hydrocarbons)compounds. Based on the quantified changes in total Contaminant mass fluxes between the control planes, first-order natural attenuation rate constants Could be estimated.