引用本文:吴海明,袁佐栋,张建,范金林,胡振,等.规模化人工湿地的温室气体释放通量[J].环境科学研究,2016,29(8):1195-1199.
WU Haiming,YUAN Zuodong,ZHANG Jian,FAN Jinlin,HU Zhen,et al.Greenhouse Gas Emissions from Large-Scale Constructed Wetlands[J].Reserrch of Environmental Science,2016,29(8):1195-1199.]
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规模化人工湿地的温室气体释放通量
吴海明1,2, 袁佐栋3, 张 建2, 范金林2, 胡 振2
1.西北农林科技大学资源环境学院, 陕西 杨凌 712100 ;2.山东大学环境科学与工程学院, 山东 济南 250100 ;3.临沂市环境保护局, 山东 临沂 276000
摘要:
基于规模化人工湿地工程——武河湿地的野外原位监测试验,采用静态箱-气相色谱法研究了人工湿地中温室气体(N2O、CH4和CO2)释放特征与规律. 结果表明,武河湿地工程的N2O和CH4平均释放通量分别为14.35和35.54 mg/(m2·d),表现为N2O、CH4的释放源,但其释放通量低于城市污水处理厂;湿地(主要包括水体和土壤生物呼吸)的CO2平均释放通量为2 889.4 mg/(m2·d). 人工湿地沿程N2O、CH4和CO2释放特征有所不同,平均释放通量呈先升后降规律,在布水渠处N2O释放通量最大,为51.92 mg/(m2·d);而6#溢流堰处CH4释放通量最大,为182.03 mg/(m2·d). 人工湿地中温室气体释放亦具有明显的季节变化规律,表现为春夏季高于秋冬季.
关键词:  人工湿地  武河  温室气体  释放通量
DOI:
分类号:
基金项目:长江科学院开放研究基金资助项目(CKWV2015240/KY);国家水体污染控制与治理科技重大专项(2012ZX07203-004);西北农林科技大学博士科研启动基金项目(2014BSJJ045)
Greenhouse Gas Emissions from Large-Scale Constructed Wetlands
WU Haiming1,2, YUAN Zuodong3, ZHANG Jian2, FAN Jinlin2, HU Zhen2
1.College of Natural Resources and Environment, Northwest Agriculture and Forestry University, Yangling 712100, China ;2.School of Environmental Science and Engineering, Shandong University, Jinan 250100, China ;3.Linyi Environmental Protection Bureau, Linyi 276000, China
Abstract:
Abstract: Global warming caused by the emissions of greenhouse gases (N2O, CH4 and CO2) is considered to be the greatest environmental problem in the world. Constructed wetlands (CWs), as a unique ecological technique, have been widely used in wastewater treatment, but their potential for greenhouse gas emissions should not be ignored. Based on in-situ monitoring in full-scale CWs, the emission fluxes of greenhouse gas including nitrous oxide (N2O), methane (CH4) and carbon dioxide (CO2) in Wu River CW were determined. The results showed that Wu River CW was a source of atmosphere N2O and CH4. The average emission fluxes of N2O, CH4 and CO2 from the CW were 14.35, 35.54 and 2889.4 mg/(m2·d), respectively. However, the emission fluxes of N2O and CH4 were lower than the values reported in the literature for sewage treatment plants. The emission fluxes of N2O, CH4 and CO2 from the CW showed significant differences among different sampling units, and the average emission flux increased and then decreased along Wu river CW. The maximum N2O emission flux of 51.92 mg/(m2·d) was observed from the distribution channel, while the emission of CH4 was found to be highest in sixth overflow weir with the flux of 182.03 mg/(m2·d). In addition, the emission fluxes of N2O, CH4 and CO2 from the CW varied seasonally, being higher in spring and summer than in fall and winter.
Key words:  constructed wetland  Wu river  greenhouse gas  emission flux