摘要
目前城市湖泊普遍存在富营养化问题,且其中很多污染严重,治理时往往由于沉水植物无法存活而导致修复失败,成为治理的难点。结合已有研究、工程实践、室内底泥氧化和墨水湖原位修复实验,探讨重污染湖泊生态修复的问题。结果显示,对水生态修复而言,氧化剂对底泥的氧化一般局限于表层1 cm内,使用时应考虑应用时间和目的;通过提升透明度等进行的墨水湖原位修复实验,实现了苦草扩繁和水质提升;在较重污染湖泊底质条件下(w(TN)≤3 000 mg/kg,w(TP)≤1 000 mg/kg)可较好的实现水生态系统的建立和维持,清淤时应充分考虑沉水植物对底泥营养条件的适应和需求;对于重污染湖泊生态修复,在保持透明度的基础上,还应加强综合控制,以保证沉水植物成活,可为重污染湖泊的生态修复提供借鉴和参考。
Urban lakes are facing eutrophication problem,and many are heavily polluted at present in China,and the treatment often fails because submerged plants cannot survive in the end,which becomes an urgent problem.Our study based on the existing researches,engineering practices,laboratory experiment with sediment oxidation and in-situ restoration experiment in the Moshui Lake.The results showed that the oxidation effect is generally limited to 1 cm of the sediment surface,thus the application time and the purpose should be considered in practical application;after water transparency has been improved,Vallisneria natans could grow and reproduce well,and the water quality was improved in the end in our insitu experiment;clear-water aquatic ecosystem can be achieved with the sediment nutrient condition:w(TN) ≤ 3 000 mg/kg,w(TP) ≤ 1 000 mg/kg,the sediment conditions which submerged macrophytes is needed should be fully considered in environmental dredging;after water transparency was achieved,other comprehensive control methods are important for ecological restoration of heavily polluted lakes.This research can provide reference for heavily polluted lakes restoration.
作者
段昌兵
侯著霞
余芬芳
陈媛媛
叶晶
DUAN Chang-bing;HOU Zhu-xia;YU Fen-fang;CHEN Yuan-yuan;YE Jing(Wuhan Zhongke Aquatic Ecological Environment Co.,Ltd.,Wuhan 430071,China)
出处
《环境科技》
2023年第3期48-53,共6页
Environmental Science and Technology
基金
重度富营养化湖泊底泥原位修复技术与示范(ZKSSYF-2020-01)
重污城市湖泊生态修复技术研究与工程示范(ZKSS-2019-01)。
关键词
水生态修复
沉水植物
重污染
墨水湖
原位修复
Water ecological restoration
Submerged plant
Heavy pollution
Moshui Lake
In-situ restoration
作者简介
段昌兵(1987-),男,山东平邑人,硕士,工程师,主要从事水体生态修复相关设计研发工作.
