水生植物修复改善再生水补给水体水质效能的研究  

Effect of aquatic plants on water quality restoration in the urban water bodies recharged by reclaimed water

作　　者：谭丽琼 朱正 于亚男 索思雨 赵梦云 王赭枫 梁文艳[2] TAN Liqiong;ZHU Zheng;YU Yanan;SUO Siyu;ZHAO Mengyun;WANG Zhefeng;LIANG Wenyan(Yuanmingyuan Management Office,Beijing,100084,China;College of Environmental Science and Engineering,Beijing Forestry University,Beijing,100083,China)

机构地区：[1]北京市海淀区圆明园管理处,北京100084 [2]北京林业大学环境科学与工程学院,北京100083

出　　处：《环境化学》2025年第1期212-220,共9页Environmental Chemistry

基　　金：国家自然科学基金(51672028);水体污染控制与治理科技重大专项(2018ZX07110-003)资助.

摘　　要：再生水已成为缺水地区的重要非常规水源.但是,再生水中的营养性污染物质往往高于地表水水质要求,易导致受纳水体出现富营养化污染.本文选取了一个仅以再生水为水源补充的城市水体进行研究.根据水生植物生长状况,划分为修复程度不同的区域,使用普通克里金插值法获取了再生水流入后的总氮(TN)、总磷(TP)、化学需氧量(COD)等污染物的空间分布与变化,分析了水生植物修复的效能与机制.结果显示,水生植物能够在再生水流入下游之前削减57.9%的TN,且在春、夏季修复效果更加突出.植物修复区域最高削减了78.3%的TP,挺水植物区对TP的修复效果较为稳定.但受高温影响,沉水植物区对TP的削减率从最高的63.4%下降到了夏季的6.61%.由于沉积物的持续释放,植物修复对COD的去除效率比对TN和TP低,仅在沉水植物区表现了相对较好的修复效果.Reclaimed water(RW)has become an important unconventional water source in waterscarce areas.However,the nutrient pollutants in RW are higher than the limits in the standard of surface water quality,which lead to the eutrophication pollution in the waterbody recharged by RW.In this study,an urban waterbody using RW as the sole water source was selected as a case.The waters were divided into areas with different phytoremediation degrees according to the growth status of aquatic plants.The spatial and temporal variations of pollutants including total nitrogen(TN),total phosphorus(TP)and chemical oxygen demand(COD)after the inflow of RW were obtained by using the common Kriging interpolation method.The efficiency and mechanism of phytoremediation were analyzed.The results showed that the replenishment of RW was a crucial reason for TN and TP pollution.Aquatic plants reduced 57.9%of TN at the highest level before the RW flows downstream,and the remediation effect was more prominent in spring and summer.The highest reduction rate of TP in phytoremediation area was 78.3%.The reduction rate of TP in the area with submerged plant decreased from the highest 63.4%to 6.61%in summer due to the high temperature,while that of emergent plant on TP was relatively stable.Due to the continuous release of sediment,the removal efficiency of COD was lower than those of TN and TP,and the remediation effect was relatively outstanding only in submerged plant areas.

关 键 词：再生水 城市水体 植物修复 地表水污染 地统计分析 

分 类 号：X-1[环境科学与工程] O6[理学—化学]