Non-aqueous phase liquid characterization via partitioning tracer tests: amodified Langmuir relation to describe partitioning nonlinearities

The equilibrium interphase behaviors of alcohol partitioning tracers betwee n NAPL and water are inherently nonlinear in nature. This nonlinearity may be described using an unfavorable form of the Langmuir partitioning relatio n with a good degree of agreement up to tracer mole fraction values of 0.3. The presence of co-tracers tends to move the equilibrium partitioning clos er to Raoult's law. It may be possible to manipulate tracer tests systems t o minimize the effects of nonlinearities through the use of co-tracers. (C) 1999 Elsevier Science B.V. All rights reserved.