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The blended coke-soil-oil mixture is further diluted
and introduced into the flotation cell. The pulp density of flotation cell is kept in the
range of 5% to 15%. |
| The crux of the remediation process " Coke
Agglomerates" are skimmed out. The process continues for about 1hr, till all the
agglomerates are skimmed and the soil is free of most of the contaminate oil. |
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The remediated soil is extracted in a soxhlet
extractor using toluene as solvent. The process takes around 18hrs. The resultant toluene
solution is analyzed through a colorimeter for the concentration of oil in the remediated
process. |
| "The nasty stuff" show is the contaminated
soil and coke slurry just after blending. The process is done for about 10 mins in a high
shear blender. |
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Particle size distribution (PSD) of soil samples was
analyzed by a PSD analyzer called Sendigraph 5100. PSD by x-ray sedimentation requires
dispersing particles in suitable liquid. Dispersion is transferred to sedimentation cell
where change in x-ray absorption is measured at decreasing depths with increasing time as
particles settle due to gravity. |
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