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Surfactants are considered promising and practical substances for enhancing polycyclic aromatic hydrocarbon (PAHs) removal from contaminated soil. In order to explore the effects of single and mixed surfactants on the removal of high-concentration PAHs from soil, a series of experiments have been conducted. In this study, Tween80-saponin (a mixed surfactant), Tween80 (a nonionic surfactant), and saponin...