Construction and application of vertical transport model of persistent organic pollutants in marine sediments
YU Donglin
WU Zhaosen
GUO Xinyu
SHI Jie
Abstract：The sediment is an important reservoir of persistent organic pollutants(POPs).The POPs flux at the sediment-water interface not only affects the pollution status of the ocean,but also have an impact on the vertical distribution of POPs in the sediments.In this study,a vertical one-dimensional transport model of POPs in sediments was constructed,including deposition,diffusion and sorption-de-sorption processes.The research object is phenanthrene.The response of the vertical distribution of phenanthrene concentration in sediments to the fluxes of sediment-water interface were simulated.On this basis,the historical long-term flux of phenanthrene at the sediment-water interface was inverted by using the observed data of the vertical distribution of phenanthrene concentration in sediment in the Bo-hai Sea.The response of the concentration profile of phenanthrene in sediments to a specific input flux showed that the variation trend of phenanthrene in sediments was consistent with that of the input flux.The concentration profile of phenanthrene in sediments could reflect the characteristics of the input flux with time.The results of the inversion of the historical long-term flux of phenanthrene showed that the flux peak appeared around 1940 and 1950,and the flux peak ranges were 0.042～0.049 ng·m-2·s-1 and 0.026～0.031 ng·m-2·s-1,respectively.
Keywords：persistent organic pollutantsphenanthrenesedimentvertical one-dimensional modelthe Bohai Sea
Publication Date：2025-08-30
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：10( 136-145 )