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Landfill is an important atmospheric mercury emission source

机译：垃圾填埋场是重要的大气汞排放源

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Since municipal wastes contain refuses with high mercury contents, incineration of municipal wastes becomes the major anthropogenic atmospheric mercury emission source. In China, landfills are however the main way to dispose of municipal wastes. Totalgaseous mercury (TGM) concentrations in landfill gas of Gaoyan sanitary landfill located in suburb of Guiyang City were monitored using a high temporal resolved automated mercury analyzer, and mono-methylmercury (MMHg) and dimethylmercury (DMHg) concentrations in landfill gas were also measured using GC coupled with the cold vapor atomic fluorescence (CVAFS) method. Meanwhile, the TGM exchange fluxes between exposed waste and air and the soil surface of the landfill and air, were measured using low Hgblank quartz flux chamber coupled with high temporal resolved automated mercury analyzer technique. TGM concentrations in landfill gas from half year filling area averaged out at 665.52 ±291.25 ng/m~3, which is comparable with TGM concentrations from flue gas of a small coal combustion boiler in Guiyang. The average MMHg and DMHg concentrations averaged out at 2.06 ± 1.82 ng/m~3 and 9.50±5.18 ng/m~3, respectively. It is proven that mercury emission is the predominant process at the surfaces of both exposed wastes and soil of landfill. Landfills are not only TGM emission source, but also methylmercury emission source to the ambient air. There are two ways to emit mercury to the air from landfills, one is with the landfill gas through landfill gas duct, and the other through soil/air exchange. The Hg emission processes from landfills are controlled by meteorological parameters.
机译：由于城市废物中含有高汞含量的垃圾，因此焚化城市废物成为人为的主要大气汞排放源。然而，在中国，垃圾填埋场是处理城市垃圾的主要方式。使用高时间分辨自动汞分析仪监测贵阳市郊区高沿卫生填埋场垃圾填埋气中的总气态汞（TGM）浓度，并使用填埋气中的单甲基汞（MMHg）和二甲基汞（DMHg）进行测量GC结合冷蒸气原子荧光（CVAFS）方法。同时，使用低Hgblank石英通量室结合高时间分辨自动汞分析仪，测量了暴露的废物和空气与垃圾填埋场和土壤表面之间的TGM交换通量。半年填充区垃圾填埋气中的TGM浓度平均为665.52±291.25 ng / m〜3，与贵阳某小型燃煤锅炉烟气中TGM的浓度相当。 MMHg和DMHg的平均浓度分别为2.06±1.82 ng / m〜3和9.50±5.18 ng / m〜3。事实证明，汞排放是裸露的废物和垃圾填埋场表面的主要过程。垃圾填埋场不仅是TGM的排放源，而且还是环境空气中的甲基汞排放源。有两种方法可以从填埋场向大气中排放汞，一种是通过填埋气管道与填埋气一起排放汞，另​​一种是通过土壤/空气交换。垃圾填埋场的汞排放过程受气象参数控制。

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