沉水植物对湖泊水体的净化效果研究

Study on the Purification Effect of Submerged Plants on Lake Water

沉水植物能通过固定底泥、吸收有害物质、吸附及过滤污染物等物理化学作用净化污染的水体,在水生态修复中起着重要的作用。本文通过在郭郑湖鹅咀生态示范研究区种植沉水植物,分析沉水植物对水体的净化作用。结果表明,沉水植物的生长对水质有一定的改善作用,围隔区内的水体透明度、溶解氧含量高于围隔区域外,叶绿素a、COD、BOD5、氨氮、总氮、总磷等监测指标低于围隔外,底泥中总氮、总磷浓度下降了20%以上。研究结果可为改善东湖水质及水生态保护提供参考。

Submerged plants can purify polluted water bodies through physical and chemical effects such as fixing sediment,absorbing harmful substances,adsorbing and filtering pollutants,and play an important role in water ecological restoration.In this paper,submerged plants were planted in the ecological demonstration research area of Guozheng Lake,and the purification effect of submerged plants on water bodies was analyzed through the form of enclosure.The results showed that the growth of submerged plants had a certain improvement effect on water quality,the transparency and dissolved oxygen content of water in the enclosed area were higher than those outside the enclosed area,the monitoring indicators of chlorophyll a,COD,BOD5,ammonia nitrogen,total nitrogen and total phosphorus were lower than those outside the enclosure,and the total nitrogen and total phosphorus concentrations in the sediment decreased by more than 20%.The research results can provide a reference for improving the water quality and water ecological protection of East Lake.