Understanding the interactions between oil and other particles in shoreline can help determine the environmental risk and cleanup strategy after oil spill. Nevertheless, far less has been known regarding the impact of aged MPs on oil behavior in the shoreline environment. In this study, the aging course of polyethylene (PE) in shaking seawater and ultraviolet (UV) radiation conditions was investigated. The seawater aging mainly affected the physical properties of MPs, increasing its surface pores and hydrophilicity. UV aging significantly affected both the physical and chemical properties of MPs, which increased its hydrophilicity and crystallinity, decreased its mean particle size and introduced oxygen-containing functional groups onto MPs. The two-dimensional correlation spectroscopy (2D COS) analysis confirmed the evolution of oxygen-containing functional groups from C–O to CO. The effects of aged MPs on oil behavior in water-sand system were further explored. The oil remaining percentages were non-linearly changed with the increasing aging degree of MPs. The particle size of the aqueous phase after washing was inversely related to the oil remaining percentage. Further FTIR analysis revealed that C–O and C–H functional groups played an important role in the process of oil adsorbed on MPs.

了解石油与海岸线上其他颗粒之间的相互作用有助于确定溢油后的环境风险和清理策略。然而，关于老化 MP 对海岸线环境中石油行为的影响知之甚少。在这项研究中，研究了聚乙烯 (PE) 在震动海水和紫外线 (UV) 辐射条件下的老化过程。海水老化主要影响MPs的物理性质，增加其表面孔隙和亲水性。UV老化显着影响了MPs的物理和化学性质，增加了MPs的亲水性和结晶度，降低了其平均粒径，并在MPs上引入了含氧官能团。O. 进一步探讨了老化 MP 对水砂系统中油行为的影响。随着MPs老化程度的增加，残油率呈非线性变化。洗涤后水相的粒度与油剩余百分比成反比。进一步的 FTIR 分析表明，C-O 和 C-H 官能团在油吸附在 MP 上的过程中发挥了重要作用。