Abstract：
The production for crude oil usually leads to contamination of the soil with trace metals and organic contaminants from spilled petroleum. Organic contaminants were generally paid more attention than trace metals in the oilfield pollution. Many studies have investigated the impacts of some petroleum hydrocarbon pollutants, however, the impacts and risk assessment of trace metals remain largely unexplored. Moreover, under some circumstances, the risks associated with trace metals are not necessarily lower than those associated with organic contaminants. This study aimed to investigate methods to evaluate the possible risks associated with 11 trace metals (Ti, Ba, Sr, Rb, V, Li, Mo, Co, Cs, Bi, and Tl) in soil and biota samples from the Shengli Oilfield using ICP-MS. The results showed that 11 trace metals in the surface soils exceeded the local background levels. The geo-accumulation index (Igeo) indicated that the soils had light-moderate to moderate contamination levels, with higher Igeo value of Ba, V, Li, Mo, Co, and Cs. The individual potential ecological risk indices ([Formula: see text]) demonstrated moderate Bi and Tl pollution in soils. Comparatively, the [Formula: see text] is recommended for the risk assessment of trace metals on the ecosystem around the oilfield area. Mo, Bi, and Sr easily accumulate in plants, as reflected by their bioaccumulation factor. Ti, Ba, V, Li, Co, Cs, Bi, and Tl exhibited considerable biomagnification, particularly in birds. In this study, trace metals showed considerable bioaccumulation and biomagnification, and the risks of these trace metals on the ecosystem around oilfield production area need more attention.
摘要：
原油的生产通常导致土壤被泄漏石油的痕量金属和有机污染物污染。在油田污染中，有机污染物比痕量金属更受关注。许多研究调查了一些石油烃污染物的影响，然而,痕量金属的影响和风险评估在很大程度上仍未探索。此外，在某些情况下,与痕量金属相关的风险不一定低于与有机污染物相关的风险。本研究旨在研究评估与11种痕量金属(Ti，Ba,Sr,Rb,V,Li,Mo,Co,Cs,Bi,和Tl）使用ICP-MS在胜利油田的土壤和生物群样品中。结果表明，表层土壤中的11种痕量金属超过了当地背景水平。地质累积指数（Igeo）表明土壤具有轻度-中度至中度污染水平，具有较高的Ba的地理位置价值，V,Li,Mo,Co,和Cs。各个潜在的生态风险指数（[公式：参见正文]）表明土壤中的Bi和Tl污染适中。相对而言,建议使用[公式：见正文]对油田周围生态系统的痕量金属进行风险评估。Mo,Bi,Sr很容易在植物中积累，正如它们的生物积累因子所反映的那样。Ti,Ba,V,Li,Co,Cs,Bi,Tl表现出相当大的生物放大作用，尤其是鸟类。在这项研究中,痕量金属显示出相当大的生物积累和生物放大作用，这些痕量金属对油田生产区周围生态系统的风险需要更多的关注。
