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盐龙湖表面流人工湿地底泥氧化层对污染物释放的影响
引用本文:张海阔,姜翠玲,朱立琴,杜观超,陈红卫,高旭.盐龙湖表面流人工湿地底泥氧化层对污染物释放的影响[J].水资源保护,2019,35(5):95-101.
作者姓名:张海阔  姜翠玲  朱立琴  杜观超  陈红卫  高旭
作者单位:河海大学水文水资源学院, 江苏 南京 210098; 河海大学全球变化与水循环国际合作联合实验室, 江苏 南京 210098,河海大学水文水资源学院, 江苏 南京 210098,河海大学马克思主义学院, 江苏 南京 210098,盐城市盐龙湖饮用水源管理处, 江苏 盐城 224014,盐城市节约用水办公室, 江苏 盐城 224001,盐城市盐龙湖饮用水源管理处, 江苏 盐城 224014
基金项目:江苏省自然科学基金青年基金(BK20150810);中央高校基本科研业务费专项(2018B48114)
摘    要:为了解盐城市盐龙湖表面流人工湿地底泥氧化层理化性质,探讨其对底泥氮、磷及有机物释放过程的影响,在测定底泥理化性质的基础上进行了室内静态柱状试验。结果表明:盐龙湖表面流人工湿地长期运行后在底泥表层形成了厚度为1 cm、呈棕黄色、无明显臭味、含水率低、TP含量高、TOC和TN含量低的氧化层;氧化层对于底泥中污染物的释放特征影响显著(P0.05),对内源污染的控制具有一定的正面作用;无氧化层试验组上覆水中TN、NH_3-N和COD的平均质量浓度分别比有氧化层试验组高9.5%、30.8%和3.5%;在湿地的实际管理中,不宜对湿地进行疏浚,如疏浚则疏浚深度应达到健康层。

关 键 词:表面流人工湿地  底泥  氧化层  污染物释放  盐龙湖
收稿时间:2018/10/10 0:00:00

Effect of oxide layer of sediment on contaminant release in surface flow constructed wetland of Yanlong Lake
ZHANG Haikuo,JIANG Cuiling,ZHU Liqin,DU Guanchao,CHEN Hongwei and GAO Xu.Effect of oxide layer of sediment on contaminant release in surface flow constructed wetland of Yanlong Lake[J].Water Resources Protection,2019,35(5):95-101.
Authors:ZHANG Haikuo  JIANG Cuiling  ZHU Liqin  DU Guanchao  CHEN Hongwei and GAO Xu
Affiliation:College of Hydrology and Water Resources, Hohai University, Nanjing 210098, China; Joint Laboratory of International Cooperation on Global Change and Water Cycle, Hohai University, Nanjing 210098, China,College of Hydrology and Water Resources, Hohai University, Nanjing 210098, China,School of Marxism, Hohai University, Nanjing 210098, China,Yancheng Yanlong Lake Drinking Water Management Office, Yancheng 224001, China,Yancheng Water Conservation Office, Yancheng 224001, China and Yancheng Yanlong Lake Drinking Water Management Office, Yancheng 224001, China
Abstract:In order to understand the physical and chemical properties of sediment oxide layer in surface flow constructed wetland of Yanlong Lake, Yancheng City, and to explore its influence on the release process of nitrogen, phosphorus and organic matter from sediment, indoor static columnar tests were carried out on the basis of determining the physical and chemical properties of sediment. The results showed that after long-term operation, the surface flow constructed wetland of Yanlong Lake formed oxidized layer with thickness of 1cm, brown-yellow, no obvious odor, low water content, high TP content, low TOC and TN contents on the surface of sediment. The oxidation layer has a significant effect on the release characteristics of pollutants in sediment(P<0. 05), and has a positive effect on the control of endogenous pollution. The average concentration of TN, NH3-N and COD in the overlying water of the non-oxidized layer test group was 9. 5%, 30. 8% and 3. 5% higher than that of the oxidized layer test group, respectively. In the actual management of wetlands, it is not appropriate to dredge wetlands. If dredging, the dredging depth should reach the healthy layer.
Keywords:surface flow constructed wetland  sediment  oxide layer  contaminant release  Yanlong Lake  
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