. PAH degradation
The degradation rates of PAHs in planted and unplanted soils are depicted in Figs. 1–3. A good growth condition of the plant was deter- mined under the PAH pollution stress (70.80–79.81 mg·kg− 1), and no significant toxic effect was observed. After a 60-day culture of Fire Phoe- nix, the degradation rate of Σ8PAHs was up to 71.37%, in particular, the degradation rate of benzo(k)fluoranthene reached 100% (Fig. 1). More- over, the degradation rate of Σ8PAHs increased (N 83.08%) significantly,