The sediments in the Gulf of Trieste (northern Adriatic Sea, Italy) are contaminated by mercury (Hg) due to historic mining which took place in Idrija (Slovenia). Despite many studies having been done regarding Hg, no information is available on the potential impact of dredging required along the main channel approaching the Port of Monfalcone. Sixteen surface sediment samples were collected along the channel to determine both total Hg concentration and chemical species using the thermo-desorption (TD) technique. Six samples were also chosen to apply a selective sequential extraction (SSE). The TD technique showed the maximum Hg release approximately at 260 and 335°C, corresponding to metacinnabar (β-HgS) and cinnabar (α-HgS), respectively. The SSE demonstrated that Hg was mainly associated with poorly soluble or insoluble compounds (98.7%). A resuspension event over a limited period of time can be considered of negligible impact to the water column due to the scarce Hg mobility from sediments.

由于在伊德里亚（斯洛文尼亚）进行的历史性采矿，的里雅斯特湾（意大利亚得里亚海北部）的沉积物被汞 (Hg) 污染。尽管已经进行了许多关于汞的研究，但没有关于沿着靠近蒙法尔科内港的主要通道进行疏浚的潜在影响的信息。沿通道收集了 16 个表层沉积物样本，以使用热解吸 (TD) 技术确定总汞浓度和化学物质。还选择了六个样品来应用选择性顺序提取 (SSE)。TD 技术显示最大的 Hg 释放大约在 260 和 335°C 时，分别对应于 metacinnabar (β-HgS) 和朱砂 (α-HgS)。SSE 表明 Hg 主要与难溶或不溶的化合物 (98.7%) 相关。