Characteristics of environmental factors and their effects on CH4 and CO2 emissions from a closed landfill: An ecological case study of Shanghai
Characteristics of environmental factors and their effects on CH4 and CO2 emissions from a closed landfill: An ecological case study of Shanghai
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封闭式垃圾填埋场环境因素特征及其对CH4和CO2排放的影响——以上海市生态为例
DOI：
10.1016/j.wasman.2009.09.047
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发表时间：
2010-03-01
期刊：
影响因子：
8.1
通讯作者：
Zhao Youcai
中科院分区：
文献类型：
--
作者：
Chai Xiaoli;Lou Ziyang;Zhao Youcai
为了阐明垃圾填埋气排放对环境因子的影响，对垃圾填埋场的植被、覆盖土壤和固体废物的特性进行了生态调查。研究了垃圾填埋场植被多样性和盖度的时空变化及其对减少甲烷排放的影响。结果表明，随着填埋场关闭时间的延长，植被盖度和多样性均呈增加趋势。植被种类的变化趋势是由多年生植物(芦荟)向一年生植物过渡。封育初期以多年生植被为主，年植被盖度随封育时间的延长而增加。植被优先出现在土壤覆盖深度较大的地区，其特点是高保湿性，使植被得以生长。盖层土壤中甲烷和二氧化碳的浓度随着封育时间的延长而显著降低。裸地土壤甲烷和二氧化碳浓度高于植被覆盖土壤，而CO2通量低于植被覆盖土壤。(C)2009爱思唯尔有限公司。保留所有权利。
To elucidate the influence of landfill gas (LFG) emission on environmental factors, an ecological investigation that was primarily concerned with the characteristics of vegetation, cover soil, and solid waste in the landfill was carried out. Temporal and spatial variations in vegetation diversity and coverage and their effects on reducing the emission of methane in the landfill were investigated. The results showed that both vegetation coverage and diversity increased with elapsed landfill closure time. The transition trend of the vegetation species was from perennial plant (Phragmites australis) to annual plants. Perennial vegetation was the dominant type of vegetation during the early closure period, and annual vegetation coverage increased with closure time. Vegetation preferentially appeared in areas of comparatively high depth of cover soil, which was characterized by high moisture retentiveness that enabled vegetation growth. The concentrations of methane and carbon dioxide in the cover soil significantly decreased with increasing closure time. The concentrations of methane and carbon dioxide from bare cover soil were higher than those from vegetated cover soil whereas the CO2 flux of bare cover soil was less than that of vegetated cover soil. (c) 2009 Elsevier Ltd. All rights reserved.