Pilot-scale floating constructed wetlands (FCWs) under varying influent salinities were implemented, and the effects of influent salinity on pollutant removal efficiency (RE) and macrophyte species selection were identified. The results suggest that a salinity increase generally decreased pollutant REs, while some macrophytes, such as Iris pseudacorus, could effectively resist this decrease. The average coefficients of variation between macrophyte species in REs of chemical oxygen demand, ammonium nitrogen, nitrate nitrogen and total phosphorus increased from 28.6% at low salinity to 91.3% at high salinity, which suggests the greater importance of macrophyte selection under high salinity. With an increase in salinity, the rhizosphere bacterial community showed convergent evolution or convergence followed by slight divergent evolution between macrophyte species, while the importance of macrophyte parameter selection in characterizing pollutant REs decreased. Therefore, influent salinity is a key factor to consider in macrophyte selection and application, especially in FCWs without soil.

在不同的进水盐度条件下实施了中试规模的浮动人工湿地（FCW），并确定了进水盐度对污染物去除效率（RE）和大型植物物种选择的影响。结果表明，盐度的增加通常会降低污染物的可再生能源，而某些大型植物，例如鸢尾鸢尾，可以有效抵抗这种下降。化学需氧量，铵态氮，硝酸盐氮和总磷的可再生能源中大型植物种类之间的平均变异系数从低盐度下的28.6％增加到高盐度下的91.3％，这表明在高盐度下大型植物的选择更为重要。随着盐度的增加，根际细菌群落表现出趋同演化或趋同，随后大型植物物种之间略有差异，而大型植物参数选择在表征污染物RE中的重要性降低。因此，进水盐度是大型植物选择和应用中要考虑的关键因素，尤其是在没有土壤的FCW中。