Influences of surfactants on the uptake of Polycyclic Aromatic Hydrocarbons(PAHs)by wheat was studied by laboratory experiments.The results show that PAHs contents in wheat seedlings growing in Nutrient Solution(NS) with excessive phenanthrene,pyrene and benz(a )pyrene(over their apparent solubility)were influenced upon addition of surfactants.After 40 culture days,surfactant Tween 80 at supra CMC(Critical Aicenlle Concentration) resulted in reduced PAHs concentrations in the wheat root but enhanced phenan...