Js. Lin et Lm. Hildemann, A NONSTEADY-STATE ANALYTICAL MODEL TO PREDICT GASEOUS EMISSIONS OF VOLATILE ORGANIC-COMPOUNDS FROM LANDFILLS, Journal of hazardous materials, 40(3), 1995, pp. 271-295
A general mathematical model is developed to predict emissions of vola
tile organic compounds (VOCs) from hazardous or sanitary landfills. Th
e model is analytical in nature and includes important mechanisms occu
rring in unsaturated subsurface landfill environments: biogas flow, le
achate flow, diffusion, adsorption, degradation, volatilization, and m
ass transfer limitations through the top cover. Two initial conditions
simulating different environments are examined. The model is able to
predict changes in subsurface concentrations and emission fluxes with
time. The equations presented here can be extended to three dimensions
to model VOC emissions from complex landfill sites.