填埋场大气中化合物分析与恶臭指示物筛选

VOCs Analyzing and Odor Indicator Selecting in Ambient Air of Landfill Area

填埋场恶臭已成为城市周边的重要污染源,在前期研究确定了填埋场内主要恶臭污染点基础上,为了进一步分析恶臭污染扩散过程的化学物质组成并寻找特异指示性化合物,利用GC-MS方法分析了填埋场作业面下风向不同扩散距离的大气恶臭污染物质谱,并对各监测点的物质谱的相似性进行比较.结果表明,以单环芳烃、烷烃和卤代烃类为代表的19种物质为填埋场大气中的共有化合物;通过对各监测点样品物质谱的相似性分析,发现下风向化合物组成受填埋作业面化合物组成的明显影响,并确定以间二甲苯作为填埋场恶臭污染的标志化合物.

The odor pollution of landfill is one of seriously pollutions in city ambient area.Main pollution points in the landfill area have been detected by preliminary research.For a particular purpose to recover the materials changing in odor dispersion process and to find out odor indication material,GC-MS method was used to detect materials in the different site at down wind direction.Then,similarity coefficient of VOCs（volatile organic compounds） composition between every two site were calculated and compared to look for changing regular of odor pollution in diffusion process.The odor pollution indictor material has be found in the materials that appeared in down wind direction of operation area and compared its’olfaction threshold.The results show that： there have 19 types of common materials in the landfill area,including monoaromatics,alkanes and halogenated compounds;Materials in the air of operation area site has marked influence on down windward direction air of landfill,and m-xlyene has been selected as odor pollution indictor of landfill air by this research.