Mercury pollution poses a serious threat to the ecological environment and public health due to its high toxicity and persistence, but there is still a lack of rapid and effective Hg(II) removal technology, especially emergency response of Hg(II) leakage. Herein, an effective metal-organic framework adsorbent, MOF-808-SH, was fabricated by grafting thioglycollic acid on MOF-808 for Hg(II) removal. The MOF-808-SH demonstrated high adsorption capacity of 977.5 mg/g, impressively ultrafast adsorption kinetics (C₀ = 10 mg/L, removal > 99 % in 10 s) with a rate constant k of 36.89 g mg⁻¹ min⁻¹, which is dozens of times faster than that of ever reported Hg(II) adsorbents. Batch experiments show that MOF-808-SH exhibits high selectivity toward Hg(II) with a distribution coefficient K_d as high as 5.0×10⁶ mL/g. Moreover, MOF-808-SH exhibits excellent recyclability with a negligible loss of capacity after 6 adsorption-regeneration cycles. Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectrometry (XPS) unveil that the –SH groups in MOF-808-SH are the key adsorption sites, and specific inner-sphere coordination with Hg(II) is responsible for the high selectivity. In addition, large surface area, well-developed porous structures and high –SH loading of MOF-808-SH reasonably explains ultrafast kinetics and high adsorption capacity for Hg(II). This study indicates the potential of MOF-808-SH to remove Hg(II) from wastewater.

汞污染由于其高毒性和持久性，对生态环境和公众健康构成严重威胁，但目前仍缺乏快速有效的去除汞（II）技术，尤其是对汞（II）泄漏的应急响应。在此，一种有效的金属有机骨架吸附剂 MOF-808-SH 通过在 MOF-808 上接枝巯基乙酸来去除 Hg(II) 制备。MOF-808-SH 表现出 977.5 mg/g 的高吸附容量，令人印象深刻的超快吸附动力学（C ₀  = 10 mg/L，10 秒内去除率 > 99 %），速率常数 k 为 36.89 g mg ^-1 min ^{- 1}，这比以往报道的 Hg(II) 吸附剂快几十倍。批量实验表明MOF-808-SH对Hg(II)表现出高选择性，分配系数K _d高达5.0×10 ⁶毫升/克。此外，MOF-808-SH 表现出优异的可回收性，在 6 次吸附-再生循环后容量损失可以忽略不计。傅里叶变换红外光谱 (FTIR) 和 X 射线光电子能谱 (XPS) 揭示 MOF-808-SH 中的 –SH 基团是关键的吸附位点，与 Hg(II) 的特定内球配位负责高选择性。此外，MOF-808-SH 的大表面积、发达的多孔结构和高–SH 负载合理地解释了超快动力学和 Hg(II) 的高吸附能力。该研究表明 MOF-808-SH 从废水中去除 Hg(II) 的潜力。