Long-term effects and performance of two-stage baffled surface flow constructed wetland treating polluted river

► Emerging plants + submerged plants + floating plants + emerging plants were built. ► The paper was studied as a reference for polluted river ecological restoration. ► Various aquatic plants were selected for vegetation configuration. ► Seasonal influence was significant in BSFCW that had been operated for two years. ► Artificial aeration as preliminary treatment in BSFCW was performed striking.