This study evaluated removal efficiencies of six contaminants of emerging concern (CECs) in floating treatment wetland (FTW) mesocosms established with either Japanese Sweetflag (Acorus gramineus Sol. ex Aiton) or canna lilies (Canna Hybrida L. ‘Orange King Humbert’). The CECs included: acetaminophen (APAP), atrazine (ATZ), carbamazepine (CBZ), perfluorooctanoic acid (PFOA), sulfamethoxazole (SMX), and 17β-estradiol (E2). Each treatment was planted with different numbers of plants (i.e., 0, 10, 15, and 20), and the experiments lasted for 17 weeks. Dissipation of CECs was greater in planted treatments than in non-planted controls, and the planting number had little effect on dissipation of CECs. All residues of APAP and E2 dissipated rapidly within 2 weeks in all planted treatments. At the end of the experiment, residues of ATZ and SMX completely dissipated in the canna treatments, but not in the sweetflag treatments (75.8–87.6% and 96.3–97.1%, respectively). During the 17 week study, moderate dissipation of CBZ was observed in treatments including cannas (79.5–82.6%) and sweetflag (69.4–82.3%), while less dissipation was observed for PFOA (9.0–15.0% with sweetflag and 58.4–62.3% with cannas). Principal component analysis indicates that aqueous persistency of CECs and species of plants used influenced the dissipation of CECs in FTWs. Of the two species evaluated, canna was the most promising plant species for FTW systems designed to remove these CECs from surface water.

这项研究评估了由日本Sweetflag（Acorus gramineus Sol。ex Aiton）或加拿大百合（Canna Hybrida）建立的漂浮处理湿地（FTW）中膜中六种新兴污染物（CEC）的去除效率。L.“橙色国王亨伯特”）。CEC包括：对乙酰氨基酚（APAP），阿特拉津（ATZ），卡马西平（CBZ），全氟辛酸（PFOA），磺胺甲恶唑（SMX）和17β-雌二醇（E2）。每种处理都种植了不同数量的植物（即0、10、15和20），实验持续了17周。在种植的处理中，CEC的耗散比未种植的对照大，并且种植数量对CEC的耗散影响很小。在所有种植的处理中，APAP和E2的所有残留物在2周内迅速消散。在实验结束时，美人蕉处理中ATZ和SMX的残留完全消失，而甜旗处理中则没有（分别为75.8–87.6％和96.3–97.1％）。在为期17周的研究中，在包括鼻窦在内的治疗中观察到了CBZ的中等消散（79.5-82。6％）和sweetflag（69.4-82.3％），而PFOA的耗散较少（sweetflag为9.0-15.0％，而美人鱼为58.4-62.3％）。主成分分析表明，CECs的水持久性和所用植物的种类会影响FTWs中CECs的消散。在评估的两个物种中，美人蕉是FTW系统中最有前途的植物物种，其目的是从地表水中去除这些CEC。