ABSTRACT
Polycyclic aromatic hydrocarbons (PAHs) cause harm to the environment and human health. PAHs contaminated soil, sediment, and groundwater have become a common environmental problem. The concentration of PAHs in abandoned coking plants is extremely high, but there have been technical difficulties in remediation of this kind of contaminated soil. The main obstacle is that the excessively high concentration of PAHs makes conventional bioremediation methods difficult to achieve ideal results. In this study, surfactants (TX100 and TW80) and biosurfactant (alkyl glycoside APG) are used to treat the coking plant-soil contaminated by high concentration PAHs, adopting the column leaching method to achieve the removal effect of PAHs in soil. The results showed that for soil A, the concentration of PAHs was relatively low, and the removal rate of total PAHs by TW80 was the highest. The removal rates of total PAHs by 1.5% TW80 and 2.5% TW80 were 19.7% and 31.6%, respectively. The removal rates of 1.5% TX100, 2.5% TX100,1.5% APG, and 2.5% APG were 12.2%, 22.5%, 12.4%, and 28.8% respectively; For soil B, the concentration of PAHs is relatively high, the removal rate of total PAHs in soil by each eluent is lower than that in soil A. The removal rates of 1.5% TW80 and 2.5% TW80 for total PAHs in soil were 11.3% and 17.8%, respectively. The removal rates of 1.5% TX100, 2.5% TX100, 1.5% APG, and 2.5% APG were 7.4%, 13.4%, 9.3%, and 11.2%, respectively.
