| 波浪作用下沉积物中总石油烃的迁移释放规律 |
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| 引用本文： | 卢芳,王卉,贾永刚,刘文全.波浪作用下沉积物中总石油烃的迁移释放规律[J].海洋通报,2023(4):375-384. |
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| 作者姓名： | 卢芳 王卉 贾永刚 刘文全 |
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| 作者单位： | 山东科技大学海洋科学与工程学院，山东，青岛，266590；青岛海洋科学与技术国家实验室海洋地质过程与环境功能实验室，山东 青岛 266061;中国海洋大学 海洋环境与生态教育部重点实验室，山东 青岛 266100;青岛海洋科学与技术国家实验室海洋地质过程与环境功能实验室，山东 青岛 266061；中国海洋大学 海洋环境与生态教育部重点实验室，
山东 青岛 266100;青岛海洋科学与技术国家实验室海洋地质过程与环境功能实验室，山东 青岛 266061；自然资源部第一海洋研究所，山东 青岛 266061 |
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| 基金项目： | 国家自然科学基金青年科学基金项目（41807247） |
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| 摘 要： | 海底石油管线泄漏可能导致海床内部形成高浓度石油污染。在波浪作用下，海床沉积物易发生再悬浮甚至液化失稳现象，进而导致海床内部石油类污染物通过多种途径向水体再次释放并在土体内部发生迁移，造成更大范围的石油扩散。本研究以总石油烃（Total Petroleum Hydrocarbon,TPH）设为代表性污染物，将污染泥浆以椭球状埋设在沉积物内部，采用波浪水槽试验研究不同强度波浪作用下TPH向上覆水体的释放规律及在沉积物内部的迁移规律。结果表明，在沉积物静置固结阶段前期，TPH随孔隙水由沉积物向上覆水体迁移释放，固结阶段前期TPH向上覆水体的释放量高于后期。在波浪作用未引起沉积物液化阶段，波浪促进石油类污染物向水体释放的作用较弱，由于悬浮泥沙对石油类污染物的吸附作用，水体中石油类污染物的浓度略低于静置固结阶段。在波浪作用引起沉积物液化阶段，随着悬浮泥沙浓度升高，TPH向上覆水体释放量加大；TPH在沉积物内部垂向迁移及平面扩散迁移距离加大，平面迁移距离大于垂向迁移距离，垂向扩散深度与液化深度基本一致，污染土体体积占比约为土体未液化时的3倍。
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| 关 键 词： | 波浪 沉积物液化 总石油烃(TPH) 迁移释放 |
| 收稿时间： | 2022/7/19 0:00:00 |
| 修稿时间： | 2022/10/13 0:00:00 |
Wave-induced migration and release of total petroleum hydrocarbons
in sediments |
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| LU Fang,WANG Hui,JIA Yonggang,LIU Wenquan.Wave-induced migration and release of total petroleum hydrocarbons
in sediments[J].Marine Science Bulletin,2023(4):375-384. |
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| Authors: | LU Fang WANG Hui JIA Yonggang LIU Wenquan |
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| Institution: | College of Marine Science & Engineering, Shandong University of Science and Technology, Qingdao 266590, China;Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology,Qingdao 266061, China;Key Laboratory of Marine Environment & Ecology, Ministry of Education, Ocean
University of China, Qingdao 266100, China;Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266061, China;Key Laboratory of Marine Environment & Ecology, Ministry of Education, Ocean University of China, Qingdao 266100, China; Laboratory for Marine Geology, Qingdao National Laboratory for Marine Science and Technology, Qingdao 266061, China;First Institute of Oceanography, MNR, Qingdao 266061, China |
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| Abstract: | The leakage of submarine oil pipelines can lead to high levels of oil pollution inside the seabed. Under the actions of waves, the seabed sediments are prone to re-suspension or even liquefaction and instability, which leads to the re-release of petroleum pollutants from the seabed to water and migration in the sediment through various channels, resulting in a wide
range of oil diffusion. In this study, total petroleum hydrocarbon (TPH) was taken as the representative pollutant, and the contaminated mud was buried in the sediment in ellipsoid. The wave flume test was used to study the release law of TPH from the sediment to the overlying water body and the migration law in the sediment under the action of different waves. The results show that TPH migrates and release with pore water from sediment to overlying water in the early stage of stationary consolidation, and the release amount of TPH is higher than that in the later stage. In the stage that sediment liquefaction not caused by wave action, the effect of wave action on the release of petroleum pollutants to water is weak. Due to the adsorption of petroleum pollutants by suspended sediment, the concentration of petroleum pollutants in water is slightly lower than that in the stage of static consolidation. During the stage of sediment liquefaction caused by wave action, the release of TPH to overlying water increased with the increase of suspended sediment concentration. The vertical migration and horizontal diffusion migration distance of TPH in the sediment increased, and the horizontal migration distance was larger than the vertical migration distance. The vertical diffusion depth was basically the same as the liquefaction depth, and the volume proportion of the contaminated soil was about three times that of the soil without liquefaction. |
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| Keywords: | waves sediment liquefaction total petroleum hydrocarbon (TPH) migration and release |
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