垃圾填埋场恶臭气体的指纹谱

Research of odor pollutant′s fingerprints in ambient air of landfill area

为研究垃圾填埋场恶臭污染排放现状,采用GC-MS方法分析研究了天津某垃圾填埋场春、夏季节不同采样点臭气中物质组成及主要组分含量.在所采集的样品中定量分析了111种物质,从中筛选21种物质并根据其归一化浓度值建立了各采样点的指纹谱图.结合物质嗅阈值和指纹谱分析,初步识别了各采样点的典型恶臭污染物,垃圾倾倒区包括硫化氢、甲苯、二甲二硫醚、甲硫醚、乙苯;填埋区包括甲苯、二硫化碳、乙醇、乙苯、乙酸乙酯;填埋气包括甲苯、乙苯、对二甲苯、邻二甲苯、甲硫醚.根据物质谱相似性分析,下风向恶臭物质组成主要受填埋区中恶臭污染物的影响.

GC-MS method was used to detect the main constituents and levels ot odorous gases Irom a tanoull in Tianjin during the spring and summer, which was performed to investigate the odour emission status of landfill. A total of 111 compounds were quantitatively analyzed for these samples, and 21 typical compounds were selected to construct the fingerprint spectrum of odorous gases of landfill. The particular pollutants at various sampling units were identified based on the olfactory threshold and fingerprint spectrum, and they are as follows： hydrogen sulfide, toluene, dimethyl disulfide, methyl sulfide and ethylbenzene for spoil area; toluene, carbon disulfide, ethanol ethylbenzene and ethyl acetate for filling area; toluene, ethylbenzene, p-xylene, o-xylene and methyl sulfide for landfill outlet. According to the similarity of composition graphs, it is found that the downwind odor pollution is mainly influenced by the filling area of landfill.