| 大气干湿沉降: 地下河多环芳烃的重要来源——以广西清水泉地下河为例 |
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| 关键词:polycyclic aromatic hydrocarbons underground river atmospheric dry and wet deposition component spectrum multimedia pollution sources |
| 基金项目:中国地质调查局地质调查项目“西南主要城市地下水污染调查评价”(编号: 1212011121166) |
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| Atmospheric Depositions, PAHs Sources of an Underground River: A Case Study of the Qingshuiquan Underground River |
| In order to prove the viewpoint that atmospheric deposition of polycyclic aromatic hydrocarbons (PAHs) is one of the pollution sources in karst underground river, the authors chose a typical underground river which is used as drinking water source as a study object. The dry and wet depositions and air samples in the study area were collected by the dry and wet deposition sampler and the PUF-passive sampler, with water samples and soils collected in the same period, and then the samples were analyzed by using GC-MS for 16 EPA PAHs. The results showed that PAH depositional fluxes ranged from 147.26 ng·(m2·d)-1, and weight of PAHs deposited in the basin was 1943.8g in two months. PAHs mean concentrations in air, dry and wet depositions and soils were 45.33 ng·m-3, 38.72 ng·g-1 and 220.98 ng·L-1 respectively, and their dominant PAH compounds were 2~3 rings PAHs such as naphthalene, fluorene, phenanthrene, fluoranthene and pyrene, whereas dominant PAH compounds in the underground river were fluorene, phenanthrene, fluoranthene, pyrene, benzo[a]anthracene and benzo[a]pyrene. Contrastive analysis was conducted in their component spectra, and the characteristic ratios as well as the chemical and physical properties of 16 kinds of PAHs prove that atmospheric deposition is one of the main pollution sources in the karst underground river because the vulnerability of groundwater to contamination in karst area is fragile. |
| KONG Xiang-sheng,MIAO Ying.2014.Atmospheric Depositions, PAHs Sources of an Underground River: A Case Study of the Qingshuiquan Underground River[J].Acta Geoscientica Sinica,35(2):239-247. |
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