地下水是重要的战略资源,随着经济高速发展和城市化、城镇化加速,大量工业废弃物、城市生活垃圾、农药化肥排入环境(殷秀兰等,2021),这些污染物通过大气、降雨、淋滤等途径污染地表水、地下水(颜翠翠等,2023)。尤其是一些迁移性较大的组...地下水是重要的战略资源,随着经济高速发展和城市化、城镇化加速,大量工业废弃物、城市生活垃圾、农药化肥排入环境(殷秀兰等,2021),这些污染物通过大气、降雨、淋滤等途径污染地表水、地下水(颜翠翠等,2023)。尤其是一些迁移性较大的组分,更容易污染地表水、地下水,部分有机污染物已经被证明具有致癌、致畸和致突变的作用(Guruge et al.,2019)。笔者等主要从样品前处理、有机物高通量快速分析等方面介绍水中新污染物分析及应用。展开更多
The Mohe permafrost in northeast China possesses favorable subsurface ambient temperature, salinity, Eh values and pH levels of groundwater for the formation of microbial gas, and the Mohe Basin contains rich organic ...The Mohe permafrost in northeast China possesses favorable subsurface ambient temperature, salinity, Eh values and pH levels of groundwater for the formation of microbial gas, and the Mohe Basin contains rich organic matter in the Middle Jurassic dark mudstones. This work conducted gas chromatography and isotope mass spectrometry analyses of nearly 90 core gas samples from the Mk-2 well in the Mohe Basin. The results show that the dryness coefficient(C1/C1–5) of core hydrocarbon gas from approximately 900 m intervals below the surface is larger than 98%, over 70% of the δ13 C values of methane are smaller than-55‰, and almost all δD values of methane are smaller than-250‰, indicative of a microbial origin of the gas from almost 900 m of the upper intervals in the Mohe permafrost. Moreover, the biomarker analyses of 72 mudstone samples from the Mohe area indicate that all of them contain 25-norhopane series compounds, thereby suggesting widely distributed microbial activities in the permafrost. This work has confirmed the prevailing existence of microbial gas in the Mohe area, which may be a potential gas source of gas hydrate formation in the Mohe permafrost. This result is of great significance to gas hydrate accumulation in the permafrost across China.展开更多
文摘地下水是重要的战略资源,随着经济高速发展和城市化、城镇化加速,大量工业废弃物、城市生活垃圾、农药化肥排入环境(殷秀兰等,2021),这些污染物通过大气、降雨、淋滤等途径污染地表水、地下水(颜翠翠等,2023)。尤其是一些迁移性较大的组分,更容易污染地表水、地下水,部分有机污染物已经被证明具有致癌、致畸和致突变的作用(Guruge et al.,2019)。笔者等主要从样品前处理、有机物高通量快速分析等方面介绍水中新污染物分析及应用。
基金supported by Prospecting and Testing Production Project of Gas Hydrate resources, Ministry of Land and Resources of China (grants No. GZHL20110317, GZHL20110320, GZHL20110322)
文摘The Mohe permafrost in northeast China possesses favorable subsurface ambient temperature, salinity, Eh values and pH levels of groundwater for the formation of microbial gas, and the Mohe Basin contains rich organic matter in the Middle Jurassic dark mudstones. This work conducted gas chromatography and isotope mass spectrometry analyses of nearly 90 core gas samples from the Mk-2 well in the Mohe Basin. The results show that the dryness coefficient(C1/C1–5) of core hydrocarbon gas from approximately 900 m intervals below the surface is larger than 98%, over 70% of the δ13 C values of methane are smaller than-55‰, and almost all δD values of methane are smaller than-250‰, indicative of a microbial origin of the gas from almost 900 m of the upper intervals in the Mohe permafrost. Moreover, the biomarker analyses of 72 mudstone samples from the Mohe area indicate that all of them contain 25-norhopane series compounds, thereby suggesting widely distributed microbial activities in the permafrost. This work has confirmed the prevailing existence of microbial gas in the Mohe area, which may be a potential gas source of gas hydrate formation in the Mohe permafrost. This result is of great significance to gas hydrate accumulation in the permafrost across China.
