入湖河口区人工湿地水质净化特征及其影响因素
Characteristics of Water Purification in Constructed Wetlands and Their Influencing Factors in Lake Estuaries
耿显双 1李嘉荣 1孙天一 2傅海峰 3李典鹏 2安树青4
作者信息
- 1. 中电建生态环境集团有限公司,广东 深圳 518102
- 2. 南京大学生命科学学院,江苏 南京 210023
- 3. 南京大学常熟生态研究院,南大(常熟)研究院有限公司,江苏 苏州 215500
- 4. 南京大学生命科学学院,江苏 南京 210023;南京大学常熟生态研究院,南大(常熟)研究院有限公司,江苏 苏州 215500
- 折叠
摘要
在入湖河口区建设人工湿地可显著削弱河湖污染负荷.本研究以安徽南淝河入湖河口十八联圩人工湿地为对象,分析一级和三级人工湿地对南淝河水质(TN、TP、COD、NH4+-N和NO3--N)的净化效率及影响因子.结果表明:1)2022年人工湿地进水NH4+-N、TP显著高于2023年(P<0.05),2023 年进水pH值相对较高.2)2022 年一级水稻田人工湿地对污染物无去除效果;2023 年除COD外,其余污染物的平均去除率为 40.8%.3)2022 年三级水稻田人工湿地对氮、磷和COD的去除率(-81.3%～50.0%)低于2023年(7.1%～93.2%).4)2022年和2023年三级多水塘人工湿地氮、磷的平均去除率分别为 71.45%和 74.18%,均高于一级和三级水稻田人工湿地.5)2022 年人工湿地水质净化与电导率(EC)、氧化还原电位(Eh)、溶解氧(DO)显著相关,与 2023 年水质指标的相关性较低.入湖河口区不同级别表流人工湿地对氮、磷的去除效果存在差异,三级人工湿地对氮、磷的净化率高于一级人工湿地,多水塘沉水植物人工湿地高于水稻人工湿地.
Abstract
The construction of artificial wetlands in the estuary area of lake significantly reduce the pollution load of river and lake.In this paper,we studied Nanfei river estuary to Shibalianwe lake in Anhui,analyzed the purification efficiency and influencing factors of the primary and tertiary constructed wetlands on the water quality(TN,TP,COD,NH4+-N,and NO3--N)of the Nanfei river.In 2022,the influent NH4+-N and TP of in the constructed wetland was higher than those in 2023,and the pH levels were relatively high in 2023.The single paddy constructed wetland did not effectively remove pollutants in 2022,but in 2023,it showed an average removal rate of 40.8%for pollutants except COD.The removal efficiencies of nitrogen,phosphorus,and COD by tertiary paddy constructed wetland in 2022(-81.3%～50.0%)were lower than in 2023(7.1%～93.2%).The tertiary multi-pond constructed wetlands had higher removal efficiencies of nitrogen and phosphorus in both 2022(71.45%)and 2023(74.18%)compared to the primary and tertiary paddy constructed wetlands.Water purification in the Shibalianwei constructed wetland was notably associated with EC,Eh,and DO in 2022,while the correlation with water quality indices was lower in 2023.Variations were observed in the removal effect of nitrogen and phosphorus among different levels of surface flow constructed wetlands in the lake's estuary,with tertiary constructed wetlands showing higher purification efficiency than the single,and submerged plant artificial wetlands in multi-ponds demonstrating superior performance compared to constructed paddy wetlands.
关键词
十八联圩/人工湿地/水稻田/沉水植物/水质净化Key words
Shibalianwei/Constructed wetland/Paddy/Submerged plants/Water purification引用本文复制引用
出版年
2024
NETL
NSTL
万方数据