Characteristics Analysis of Soil and Groundwater Pollutants in an Operating Petrochemical Enterprise
A soil and groundwater pollution investigation was conducted on an aromatics complex of a petrochemical enterprise,identifying characteristic pollutants.Based on industry characteristics and investigation limitations of the enterprise,a targeted investigation plan was developed to collect soil and groundwater samples.The detection results indicate that the pollutants in soil and groundwater are benzene series and petroleum hydrocarbons,both of which are characteristic pollutants of the site.The soil pollutants are volatile organic compounds,and the exceeding depth is mainly near the groundwater level.Groundwater has a large number of pollutants that exceed the standard,a wide distribution range,and a high multiple of exceeding the standard,resulting in severe pollution.The preliminary judgment is that the leakage during the historical production process of the device caused groundwater pollution,and the migration and diffusion of pollutants in groundwater generated groundwater pollution plumes,which formed low-density non-aqueous liquid accumulation downstream.Volatile organic compounds volatilize from bottom to top,causing soil pollution in the surrounding green belts of the device.Due to safety management and operational space restrictions in petrochemical enterprises in production,it is recommended that similar investigations in operating enterprises should focus on the protective capacity of the vadose zone against pollution and the investigation of groundwater pollution.
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