Investigation of Rate Processes in the Thermal Treatment of Contaminated Soils. Final Report November 1986-November 1989

摘要

The objective of the project was to evaluate and define the treatability limits for thermal treatment processes which can be used to remediate soils from manufactured gas plant (MGP) sites and other wastes. Successful application of thermal treatment technologies as well as prediction and optimization of process performance is dependent on a thorough understanding of soil/contaminant interactions, contaminant desorption and transport, and heat and mass transfer within treatment systems. The experimental results given in the final report were used to define the rate limiting step(s) in the desorption of contaminant. Data and modeling of desorption from a particle and a bed of soil are discussed. Temperature appears to be the most important variable in the desorption of contaminant from the soil due to the adsorptive nature of the soil and the contaminant. The resistances of the soil to heat and mass transfer are also important; beds of soil take longer to heat up and the contaminant mass transfer is slower.