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利用填料与水生植物构建强化型生态浮床,对重污染城市感潮河流进行原位修复。对浮床植物的生长情况及其对污染物的去除开展为期1a的监测,5种浮床植物表现出良好的耐污能力和去污能力。美人蕉相对生长速率最佳,为0.095 d~(-1);再力花、黄菖蒲、梭鱼草、风车草分别为0.080 d~(-1)、0.074 d~(-1)、0.045 d~(-1)和0.047 d~(-1)。各植物中美人蕉氧输送率最大,为57.08 gO_2·m~(-2)·d~(-1);其浮床系统对TN、NH_4~+-N、TP、COD_(Cr)和BOD_5的去除负荷也较高,分别为4.12kg·m~(-2)·a~(-1)、3.86 kg·m~(-2)·a~(-1)、0.15 kg·m~(-2)·a~(-1)、46.58 kg·m~(-2)·a~(-1)和4.36 k·m~(-2)·a~(-1),一阶降解系数分别为1.33 d~(-1)、1.37 d~(-1)、1.72 d~(-1)、3.92 d~(-1)和1.58 d~(-1)。与传统植物浮床相比,强化型生态浮床具有加速有机污染物分解速率和提高水体中氮磷营养盐处理效果等优点。
The use of packing and aquatic plants to build enhanced ecological floating bed, the heavily polluted urban tidal river in situ repair. The growth of floating-bed plants and their removal of pollutants were monitored for period 1a, and the five floating-bed plants showed good stain-resistance and detergency. The relative growth rate of canna was the best, which was 0.095 d ~ (-1). The average growth rate was 0.080 d ~ (-1), 0.074 d ~ (-1), 0.045 d ~ (-1) and 0.047 d -1. The transpiration rate of canna was 57.08 gO_2 · m ~ (-2) · d -1, the removal rate of TN, NH_4 ~ + -N, TP, COD_ (Cr) and BOD_5 Were also higher, which were 4.12 kg · m -2 · a -1, 3.86 kg · m -2 · a -1 and 0.15 kg · m -2 · a -1, 46.58 kg · m -2 · a -1 and 4.36 k · m -2 · a -1, respectively, and the first order degradation coefficients were 1.33 d ~ (-1), 1.37 d ~ (-1), 1.72 d ~ (-1), 3.92 d ~ (-1) and 1.58 d ~ (-1), respectively. Compared with traditional plant floating beds, enhanced ecological floating beds have the advantages of accelerating the decomposition rate of organic pollutants and improving the treatment effect of nitrogen and phosphorus nutrients in water.