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NO_(3)--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。
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 NO_(3)^(-)-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.
作者
耿显双
李嘉荣
孙天一
傅海峰
李典鹏
安树青
GENG Xian-shuang;LI Jia-rong;SUN Tian-yi;FU Hai-feng;LI Dian-peng;AN Shu-qing(Power china Eco-Environmental Group Co.,Ltd,Shenzhen,518102 Guangdong China;School of Life Sciences,Nanjing University,Nanjing 210046,Jiangsu,China;Nanjing University Ecological Research Institute of Changshu,Nanjing University Research Institute(Changshu)Co.,Ltd,Suzhou 215500,Jiangsu,China)
出处
《湿地科学与管理》
2024年第4期32-36,43,共6页
Wetland Science & Management
基金
多水塘活水链湿地水质净化单元组合优化与最适运行水位调控研究。
关键词
十八联圩
人工湿地
水稻田
沉水植物
水质净化
Shibalianwei
Constructed wetland
Paddy
Submerged plants
Water purification
