The fluxes of SP4-8 CDD/Fs increased gradually since 1951 and STEQ fluxes increased significantly since 1980. The sources of PCDD/Fs in Qingdao coastal sea were constant relatively and were guessed to be the sewage sluge and atmospheric deposition.

• SP4-8CDD/Fs沉积通量从1951年起逐渐增大；STEQ沉积通量从1980年显著增大.；青岛近海PCDD/Fs的来源相对恒定；推测为城市污水污泥和大气沉降