Contaminated soil will be cleaned with the oil agglomeration-flotation technique. Petroleum coke and coal will be the remediating agent in this study. In the oil agglomeration-flotation process, contaminated soil will be mixed with fine petroleum coke/coal in hot water, and then the slurry will be subjected to very high agitation, This causes the oil to preferentially adsorb on petroleum coke, and they are then seperated as agglomerates through flotation.

    Two processes have been developed for the oil agglomeration-flotation method. They are one-step process and two-step process. In the two-step process, agglomerates are recycled to the following run, which gives larger agglomerates, that can be caught on 100 mesh U.S. standard sieve.