城市尺度高空间分辨率VOCs组分排放清单构建方法与应用
Construction and Application of Urban Scale VOCs Emission Inventory with High Spatial Resolution
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摘要: 挥发性有机物(VOCs)是影响大气复合污染形成的关键前体物,来源众多且化学组成差异大。为满足城市尺度VOCs精准管控需求,该研究基于“自下而上”的人为源活动水平数据与植被遥感资料,并与文献调研和实测VOCs源谱信息相耦合,采用排放因子法,构建了城市尺度高空间分辨率VOCs组分清单的编制方法,并以河南省驻马店市为研究区域开展应用。结果表明:①该研究所构建的清单编制方法能够获取城市尺度高空间分辨率的VOCs组分排放清单,根据现阶段可获取的活动水平分辨率,清单分辨率可达1km×1km及以上。②在组分排放上,烯烃排放量最高,其次是烷烃和含氧VOCs(oxygenated volatile organic compounds,OVOCs),排放量前10组分分别为异戊二烯、苯乙烯、乙酸乙酯、乙烯、单萜烯、苯、乙醛、正己烷、甲苯、甲醛;OFP总量为366111.0 t,烯烃和OVOCs是主要贡献者,OFP前10组分分别为异戊二烯、乙烯、乙醛、甲醛、丙烯、单萜烯、间对二甲苯、甲苯、苯乙烯和1-丁烯;在空间分布上,研究区域VOCs排放空间分布呈现明显差异,林地茂密、工业企业密集、人口和路网密度较大的区域VOCs排放量较高。③将清单结果与受体模型解析结果进行对比,发现两者在主要源类的识别上基本一致,印证了该研究所构建清单的可靠性。
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关键词:
- 挥发性有机物(VOCs) /
- 排放清单 /
- 高空间分辨率 /
- 源成分谱 /
- 评估
Abstract: Volatile organic compounds (VOCs) are the key precursors that affect the formation of air compound pollution, with many sources and large differences in chemical composition. In order to meet the demand for precise control of urban scale VOCs, this study is based on the "bottom-up" anthropogenic activity level data and vegetation remote sensing data, coupled with literature research and measured VOCs source profiles, and adopts the emission factor method to develop the compilation method of urban scale high spatial resolution speciated VOCs emission inventory, which is applied in Zhumadian City, Henan Province as the research area. The results show that: (1) The inventory preparation method constructed by the Institute can obtain urban scale speciated VOCs emission inventory with high spatial resolution. According to the activity level resolution available at this stage, the inventory resolution can reach 1km × 1km and above. (2) In terms of component emissions, olefin emissions are the highest, followed by alkanes and OVOCs(oxygenated volatile organic compounds). The top 10 components of emissions are isoprene, styrene, ethyl acetate, ethylene, monoterpene, benzene, acetaldehyde, n-hexane, toluene and formaldehyde, respectively; The total amount of OFP is 366111.0 t, olefins and OVOCs are the main contributors, and the top 10 components of OFP are isoprene, ethylene, acetaldehyde, formaldehyde, propylene, monoterpene, m-xylene, toluene, styrene and 1-butene respectively; In terms of spatial distribution, the spatial distribution of VOCs emissions in the study area is significantly different. The VOCs emissions in areas with dense forests, dense industrial enterprises, and large population and road network density are higher. (3) Comparing the emission inventory results with the receptor model analysis results, it is found that the two are basically consistent in the identification of major source classes, which confirms the reliability of the list constructed by the Institute.
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