海南生物质燃烧源排放清单的时空配分

Spatial and temporal distribution of emission inventory of air pollutants from biomass burning sources in Hainan Province

为了厘清海南省生物质燃烧源污染状况,本文调查了海南省2019年生物质燃烧源活动水平数据,采用排放因子法,建立了海南省2019年生物质燃烧7种污染物的排放清单,并进行时空配分和不确定分析。结果表明:2019年海南省生物质燃烧源排放的CO、CO_(2)、SO_(2)、NO_(X)、NH_(3)、CH_(4)和PM_(2.5)分别为17779.77、587732.18、340.87、1208.31、308.69、5674.55和4946.24 t。其中,稻谷秸秆露天焚烧对CO、CO_(2)、SO_(2)、NO_(X)、NH_(3)、CH_(4)和PM_(2.5)排放贡献率最高,而花生和甘蔗秸秆露天燃烧的CH_(4)排放贡献率最高。海南省生物质燃烧源大气污染物排放地区分布不均衡,海口市是主要污染区域。海南省生物质燃烧源大气污染物月份排放时间也不均衡,排放多集中在每年的3、4、7和10月,多集中在每日的3:00—6:00、11:00—15:00和17:00—19:00。不确定性分析表明,森林火灾的CO_(2)和NH_(3)排放的不确定度最高,分别为-29.5%~28.5%和-27.7%~29.6%;秸秆露天焚烧的CH_(4)排放不确定度最低,仅为-15.5%~12.5%。

To clarify the pollution situation of biomass combustion sources in Hainan Province,we investigated the activity level data of biomass combustion sources in Hainan Province in 2019,established the emission inventory of seven pollutants from biomass combustion using the emission factor method,and analyzed spatiotemporal distribu-tion and uncertainty of the emission inventory.The results showed that the emissions of CO,CO_(2),SO_(2),NO_(X),NH_(3),CH_(4) and PM_(2.5) from biomass combustion sources in Hainan Province in 2019 were 17779.77,587732.18,340.87,1208.31,308.69,5674.55,and 4946.24 t,respectively.Open burning of rice straw had the highest con-tribution rate to CO,CO_(2),SO_(2),NO_(X),NH_(3),CH_(4) and PM_(2.5) emissions,while open burning of peanut and sugar-cane straw had the highest contribution rate to CH_(4) emissions.The distribution of air pollutant emissions from bio-mass combustion sources in Hainan Province was uneven.Haikou was the main emission area of pollution.The emission of air pollutants from biomass combustion sources in Hainan Province was uneven at the temporal perspec-tive,and most of the emissions were concentrated in March,April,July and October,and mostly concentrated in the daily period of 3:00-6:00,11:00-15:00 and 17:00-19:00.The uncertainty of CO_(2) and NH_(3) emissions from forest fires was the highest,being-29.5%to 28.5%and-27.7%to 29.6%,respectively.The uncertainty of CH_(4) emission from open burning of straw was the lowest,being-15.5%to 12.5%.