生活垃圾填埋场覆盖层温室气体CH_4和CO_2释放规律及其相关性研究  

Study on Emission Characteristics and Correlation of GHGs CH_4and CO_2in MSW Landfill Cover Layer

作　　者：马占云[1] 李海玲[1,2] 岳波[1] 高庆先[1] 董路[1] 

机构地区：[1]中国环境科学研究院,北京100012 [2]兰州大学大气科学学院,甘肃兰州730000

出　　处：《环境工程技术学报》2014年第5期399-405,共7页Journal of Environmental Engineering Technology

基　　金：中国科学院战略性先导科技专项(XDA05020601);国家科技支撑计划项目(2014BAL02B01);环境保护部2014年应对气候变化工作项目(CC(2014)-9-3);国家自然科学基金项目(41175137)

摘　　要：针对北京某生活垃圾填埋场封场区覆盖层开展了为期1 a的CH4和CO2释放通量监测,分析了填埋场封场区CH4和CO2释放通量年变化规律和不同季节的日变化规律,并对CH4和CO2释放通量之间的相关关系及其影响机制进行了探讨。结果表明,10个监测点间、相同监测点不同监测时段间CH4释放通量差异较大。不同监测点覆盖层表面CH4和CO2释放通量年变化规律表现为,CH4释放通量随CO2释放通量年变化规律波动,二者表现为显著正相关;在春、夏、秋季CH4释放通量变化较为平稳,冬季CH4释放通量随CO2释放通量变化规律波动;24 h内CH4释放通量变化规律存在随机性;周围大气中CH4的浓度直接影响覆盖层对大气中CH4的氧化。The emission fluxes of methane and carbon dioxide were tested at cover layer of one MSW landfill in Beijing for one year. The seasonal and diurnal variation of methane and carbon dioxide emission fluxes at MSW landfill sites was analyzed, and the correlation of methane and carbon dioxide emission fluxes as well as the influencing mechanisms explored. The result shows that there exists big imparity among methane emission fluxes at 10 monitoring sites or at the same point for different time. The seasonal variation of methane emission at different sites may fluctuate with the carbon dioxide emission fluxes, showing a significant correlation, or the methane emission fluxes may have a small fluctuation in spring, summer and autumn, but fluctuate with the carbon dioxide emission fluxes in winter. The diurnal variation of methane emission fluxes shows no regularity. The methane content in atmosphere has a significant influence on the methane oxidation in the landfill cover.

关 键 词：生活垃圾填埋场覆盖层 CH4释放通量 年变化 日变化 甲烷氧化作用 

分 类 号：X799.3[环境科学与工程—环境工程]