某油库周边地下水中有机污染特征及来源分析

Analysis on Characteristics and Sources of VOC in the Groundwater for the Area around a Small Oil Depot

为了研究某油库周边地下水的污染特征以及污染来源,在研究区采集8个地下水样品,检测了55项VOC指标。结果表明,检出有机物占总检出物质种类的43.6%,检出率超过50%的物质有11种,多环芳烃检出率最高。其中,苯并(a)芘超出《生活饮用水卫生标准》限值,SZK-8处苯并(a)芘是标准值的123倍。多环芳烃类有机物含量在样点SZK-8最高,取水井处有机物含量相对较低,这主要是受地下水径流条件的影响。芴、菲、蒽、荧蒽、芘、艾氏剂、二氢苊相关性很好,具有同一污染源。分析表明,油库周边地下水已经遭受到了垃圾堆放物、农药以及油库等多方面的有机污染。

In order to study characteristics of groundwater pollution and pollution sources in a depot surrounding, 8 groundwater samples were collected in the study area and there were 55 VOCs detected in the groundwater. Results showed that the detected organic substances accounted for 43.6% of the total species, and there were 11 matters whose detection frequencies was more than 50%, and PAHs had the highest detection frequencies. Among them, benzo（a） pyrene exceeded drinking water sanitary standard, and benzo（a） pyrene in the sampling location SZK-8 was 123 times of the standard value.PAHs concentration in SZK-8 was the highest, and there were relatively low organic contents in the well, which may be affected by the groundwater runoff. Fluorene, phenanthrene, anthracene, fluoranthene, pyrene, aldrin, acenaphthene have good correlation with the same sources. Analysis shows that the groundwater surrounding the oil depot has been suffered from the organic pollution of waste pilings, pesticide and depot.