The Golden Horn estuary, which is located along the Sea of Marmara adjacent to the center of Istanbul, has been heavily polluted for centuries due to concentrated shipping activities, and a legacy of industrial and municipal discharges. The municipalities and associated governments have implemented environmental rehabilitation projects for over 25 years. However, the Golden Horn estuary is still exposed to various pollutants such as vehicle emissions including from fossil-fuel combustion. In this study, two sediment traps were deployed in the Golden Horn estuary to obtain information on settling particle (SP) composition and fluxes, trace element and radionuclide concentrations, and fluxes thereof. Conventional sediment traps (Trap-1 and Trap-2) were installed side-by-side, at a depth of 15-m and moored for 18 months during which time the sediment traps were periodically sampled. Over this time period, settling particle fluxes (SPFs) were calculated. The concentrations and fluxes of radionuclides (¹³⁷Cs, ²²⁶Ra, ²²⁸Ra, ²¹⁰Po, and ²¹⁰Pb) and trace elements (Ag, Al, As, Cd, Cu, Fe, K, Mn, Mo, Ni, Pb, Sb Sn, Tl, V, and Zn) were determined in SPs for each sampling period. Normalized enrichment factors (EF) and a Geoaccumulation Index (${\mathit{I}}_{geo}$) showed that Ag, Cd, and Pb were statistically enriched in SPs. Together, the results of this study show that the Golden Horn estuary is still enriched in some environmental pollutants which could be a source term for the water column and associated marine animals.

金角湾位于伊斯坦布尔市中心附近的马尔马拉海沿岸，几个世纪以来，由于集中的航运活动以及工业和市政排放的遗留问题，一直受到严重污染。市政当局和相关政府实施环境恢复项目已超过 25 年。然而，金角湾仍然暴露在各种污染物中，例如来自化石燃料燃烧的车辆排放物。在这项研究中，在金角湾河口部署了两个沉积物捕集器，以获取有关沉降颗粒 (SP) 成分和通量、微量元素和放射性核素浓度及其通量的信息。并排安装常规沉积物捕集器（Trap-1 和 Trap-2），在 15 米的深度停泊 18 个月，在此期间定期对沉积物捕集器进行采样。在这段时间内，计算了沉降颗粒通量 (SPF)。放射性核素的浓度和通量（¹³⁷ Cs、²²⁶ Ra、²²⁸ Ra、²¹⁰ Po 和²¹⁰ Pb）和微量元素（Ag、Al、As、Cd、Cu、Fe、K、Mn、Mo、Ni、Pb、Sb Sn、Tl、V 和Zn) 在每个采样周期的 SP 中确定。归一化富集因子 (EF) 和地质累积指数 (${\mathit{一世}}_{G\mathrm{电子}○}$) 表明 Ag、Cd 和 Pb 在统计上富含 SP。总之，这项研究的结果表明，金角湾仍然富含一些环境污染物，这些污染物可能是水柱和相关海洋动物的源项。