טכניון מכון טכנולוגי לישראל
הטכניון מכון טכנולוגי לישראל - בית הספר ללימודי מוסמכים  
M.Sc Thesis
M.Sc StudentDmitry David Tartakovsky
SubjectExamination of the Influence of Absorption and
Biodegradation Parameters on Bioremediation of
Soil
DepartmentDepartment of Civil and Environmental Engineering
Supervisor Professor Emeritus Galil Noah (Deceased)


Abstract

In this research, processes that contribute to phenol and chlorophenols (2-monochlorophenol 2,4,6- trichlorophenol, pentachlorophenol) removal from sandy soil, were studied. 

             The purpose of this research is to investigate the influence of adsorption and biodegradation on the fate of accidental spills of phenol and chlorophenols at shock loadings at various concentrations on a surface in the unsaturated zone of the soil.

             In this study a mathematical model (Bear and Buchlin, 1991) for the description of the removal of organic pollutants from soil was applied for a case when the pollutants are phenol and chlorophenols and the sorption is nonlinear.

            It was proved, that under conditions of removal of phenol and chlorophenols from sandy soil the influence of transport parameters is insignificant in comparison with the importance of sorption and biodegradation mechanisms.

             It was found that it is possible to see the influence of the porosity reduction only in the case of phenol in the extreme ratios between the biodegradation constants in the attached (solid) and the suspended (liquid) phases, but even in this case the influence is not dominant.

             From the results of this research follows that the higher the ratio between the biodegradation constant in the attached (solid) phase and the biodegradation constant in the suspended (liquid) phase, the phenol and the chlorophenols are removed faster.     The factors influencing the removal of phenol and chlorophenols from sandy soil in order of importance are:

1)          biodegradation

2)          adsorption

3)                    transport.