Contaminant transport resulting from multicomponent nonaqueous phase liquid pool dissolution in three-dimensional subsurface formations

摘要

A semi-analytical method for simulating transient contaminant transport originating from the dissolution of multicomponent nonaqueous phase liquid(NAPL)pools in three-dimensional, saturated, homogeneous porous media is presented. Each dissolved component may undergo first-order decay and may sorb under local equilibrium conditions. The NAPL pool dissolution process is envisioned to occur in a series of consecutive short intervals(pulses). The mole fraction, nonaqueous phase activity coefficient and aqueous solubility of every pool constituent are estimated before the initiation of each pulse, and they are assumed to remain constant for the duration of each interval.