Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China; University of Chinese Academy of Sciences, Beijing 100049, China.
Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China; University of Chinese Academy of Sciences, Beijing 100049, China; Key Laboratory of Petroleum Resources, Gansu Province, Lanzhou 730000, China.
Mar Pollut Bull. 2022 Dec;185(Pt B):114338. doi: 10.1016/j.marpolbul.2022.114338. Epub 2022 Nov 12.
Petroleum contamination surrounding oilfields has attracted more concerns. However, the levels, distribution and source of petroleum of Changqing Oilfield soil still remain lots of knowns, which is important for local environmental protection. Given soil contamination issues in Changqiong Oilfield were investigated. The maximum concentrations of total petroleum hydrocarbons (TPHs), N-alkanes (TNAs) and polycyclic aromatic hydrocarbons (PAHs) were determined to be 1960.29, 96.13 and 0.82 mg/kg, respectively. TPHs were higher in the north than the south of the study area. TPHs decreased in the horizontal and vertical distribution as soil depth and distance from oil wells increased. Source analysis showed that TNAs mainly originated from petroleum, PAHs were controlled by petroleum spills, combustion and traffic. Correlation analysis implied that TPHs residues had an effect on soil environmental quality. This study have important implications for understanding the environmental behavior of petroleum and can provide support for petroleum remediation and risk control.
油田周边的石油污染引起了更多的关注。然而，对于当地的环境保护来说，长庆油田土壤中石油的水平、分布和来源仍有许多未知因素。鉴于此，对长琼油田的土壤污染问题进行了调查。研究区土壤中石油烃（TPHs）、正构烷烃（TNAs）和多环芳烃（PAHs）的最大浓度分别为 1960.29、96.13 和 0.82 mg/kg。TPHs 在研究区北部的含量高于南部。随着土壤深度和离油井距离的增加，TPHs 在水平和垂直分布上呈下降趋势。来源分析表明，TNAs 主要来源于石油，PAHs 则受石油泄漏、燃烧和交通的控制。相关性分析表明，TPHs 残留对土壤环境质量有影响。本研究对于了解石油的环境行为具有重要意义，并可为石油修复和风险控制提供支持。
