The bioavailability of PAHs in aged mangrove sediment after phytoremediation was considerably lower than in the NA/NF and flooded sediment. Additionally, flooding decreased the bioavailability of PAHs
(104.18 mg/kg for Nap,48.48 mg/kg for Ant and 17.30 mg/kg for B[a]P)
relative to the NA/NF condition.