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Pollution of organic compounds and heavy metals in a coal gangue dump of the Gequan Coal Mine, China |
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| Authors: | Jingsen Fan Yuzhuang Sun Xinyu Li Cunliang Zhao Duanxin Tian Longyi Shao Jinxi Wang |
| Institution: | 1. Key Laboratory of Hebei Province for Resource Exploration Research, Hebei University of Engineering, Handan, 056038, China 2. China University of Mining and Technology (Beijing), Beijing, 100083, China 3. The Fourth Construction Co., Ltd. of China Electronics System Engineering, Shijiazhuang, 050081, China 4. The Land and Resources Department of Wu’an, Handan, 056300, China |
| Abstract: | Samples around a coal gangue dump of the Gequan Coal Mine were collected in April 2009. GC (gas chromatography) and GC/MS (gas chromatography/mass spectrometry) were employed to analyze the composition of organic matter in the samples. ICP-MS (inductively coupled plasma mass spectrometry) was used to determine the concentrations of heavy metals. The contents of organic extracts are within the range of 140–750 mg/kg. Alk- and aro-ratios are relatively high. Compared to those of the background sample (GQ13), the contents of saturated hydrocarbon compounds in all the samples are relatively high. The contents of polycyclic aromatic hydrocarbons (PAHs) are relatively high with the distance getting closer to the coal gangue dump. These indicate that organic matter in the samples is from coal particles of the coal gangue dump. The distributions of heavy metals are very similar: the contents decrease with distance from the dump, which indicates that the harmful heavy metals from the coal gangue dump have polluted as thick as at least 500 m. |
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