The underground migration and distribution of petroleum contamination at a gas station
ZHANG Hong-kai1, ZUO Rui1,2, WANG Jin-sheng1,2, JIN Chao1, GUO Xue-ru1, TENG Yan-guo1,2
1. College of Water Sciences, Beijing Normal University, Beijing 100875, China;
2. Engineering Research Center of Groundwater Pollution Control and Remediation, Ministry of Education, Beijing 100875, China
This thesis studied a gas station site that has been polluted by leaking petroleum contaminant. Samples of soil and groundwater at the site were collected and analyzed. The concentrations of lead, total petroleum hydrocarbons (TPH), polycyclic aromatic hydrocarbons, benzene series, and methyl tert-butyl ether (MTBE) were analyzed, and their distribution and migration characteristics in soil and groundwater for different functional areas were discussed. The lithology of the aeration zone and aquifer were dominated by sandy silt, clayey silt, and silty clay. The main pollutants in the soils were TPH (C < 16) and benzene. Analyses in the vertical direction revealed very high concentrations of contaminants close to the groundwater table. In areas of perched groundwater, the main pollutants were TPH (C < 16) and benzene. For phreatic water the main pollutants were TPH (C < 16), benzene, and MTBE. The confined groundwater was uncontaminated. The study recommended that in situ restoration technologies should be applied to the soil and groundwater. This recommendation was based on an analysis of remediation carried out at other petroleum-contaminated sites, and the conditions at the study site.
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ZHANG Hong-kai, ZUO Rui, WANG Jin-sheng, JIN Chao, GUO Xue-ru, TENG Yan-guo. The underground migration and distribution of petroleum contamination at a gas station. CHINA ENVIRONMENTAL SCIENCECE, 2018, 38(4): 1532-1539.
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