Mathematical modeling and simulation of 2-methylpropane-2-thiol migration pattern in soil system in order to polluted site determination

2-methylpropane-2-thiol is an odorant hydrocarbon which is classified as a hazardous material and pollution of soil with thiols is an environmental, human and animal problems. In order to study about oxidation remediation of the soil polluted with this contaminant, it is necessary to determine the dimensions of the pilot-scale reactor. The cost effective investigation in order to evaluate migration pattern in the reactor is mathematical modeling and simulation. In this study, based on Darcy’s works mathematical models are developed in order to investigation of migration pattern in soil collected from 3 points of the Isfahan city.In order to mathematical modeling, 98, 1007 and 9897 miliDarcy (mD) are used for permeability and, 0 to 1.970 g/m2s for evaporation rate and the effects of the impermeable sub surfaces. The results show that with increasing evaporation rate, diffusion volume decreases. Furthermore, increasing in permeability from 100 to 10000 mD with 1g/m2s evaporation rate leads to increasing the thiol diffusion from 74% to 96% of original volume. The optimum dimension of the pilot-scale reactor is determined with respect to simulation results for minimum evaporation rate and maximum permeability (0 g/m2s and 9897 mD respectively) was 3 for radius to depth ratio in 0.1 day time interval. This study could be used for industrial scale for investigation of thiol migration in soil system and determination of dimensions of the polluted site and amount of the oxidants are needed.

Keywords:

Diffusion modeling , Simulation , 2-methylpropane-2-thiol , Soil pollution , Optimum pilot-scale dimension