【摘要】 采用生态混凝土球、4球联体及圆孔型砌块分别护砌开挖的1#~3#河道,并以采用“三面光”护砌的4#河道为对照,研究了生态护砌对水质的改善效果。试验结果表明:当以黄浦江水为处理对象时,在水力停留时间为2 d的条件下,对1#~3#河水的CODMn去除率分别为14.3%、12.7%、12.7%,对NH4+-N的去除率>55%,对NO2--N的去除率分别为82.5%、70.2%、74.0%,对TN的去除率分别为14.6%、12.5%、11.6%,对TP的去除率分别为50.8%、34.9%、51.5%;对4#河水的CODMn、NH4+-N、NO2--N、TN、TP去除率分别为5.0%、8.9%、5.4%、4.1%、16.8%;生态护砌能有效降低河水的UV254值(降幅>7.4%),而4#河水的UV254值则没有明显降低。由此可见,对河道采用生态护砌能有效改善水质,修复和完善河流生态系统。更多还原

【Abstract】 Water purification effects of four types of river embankments were studied.The embankments for rivers No.1,2,and 3 consist of prefab spheriform bricks,square bricks with 4 hemispheroids and rectangular bricks with three holes,all made of eco-concrete.The embankment for river No.4 is hard.The results show that taking Huangpu River water as treatment object,under the hydraulic retention time of 2 days,the removal rates by ecological embankments for rivers No.1,2,and 3 are 14.3%,12.7% and 12.7% for CODMn,more than 55% for NH+4-N,82.5%,70.2% and 74.0% for NO-2-N,14.6%,12.5% and 11.6% for TN,and 50.8%,34.9% and 51.5% for TP,respectively.The removal rates of CODMn,NH+4-N,NO-2-N,TN and TP by hard embankment for river No.4 are 5.0%,8.9%,5.4%,4.1% and 16.8% respectively.UV254 can be decreased by 7.4% when using ecological embankments,while no change of UV254 is shown in the river No.4.The ecological embankment rivers can effectively improve river water quality,restore and complete the ecology system.更多还原