Department of Environmental Engineering, Korea University, Sejong City, 30019, Republic of Korea.
Department of Chemical Engineering, Daegu University, Geongsan-si, 38453, Republic of Korea.
Chemosphere. 2020 Jan;238:124656. doi: 10.1016/j.chemosphere.2019.124656. Epub 2019 Aug 24.
A composite sorbent for the simultaneous removal of both Hg and SeO from aqueous media was produced from the solvothermal synthesis of a zirconium metal organic framework, UiO-66, in the presence of activated carbon. The composite sorbent has a large surface area of 1051 m g with crystalized porous structures and has strong thermal stability up to 600 °C. The contaminant uptake of the sorbent follows a Langmuir adsorption isotherm with maximum sorption capacity of 205 mg g and 168 mg g for Hg and SeO, respectively. Scanning electron microscopy-energy dispersive spectroscopy results show that the Se regions overlap exclusively with Zr-rich regions suggesting that SeO adsorption depends entirely on the exposed UiO-66 surface. In addition, X-ray photoelectron spectroscopy spectra of Se 3d and Hg 4f showed the association of SeO and Hg on the UiO-66 and carbon surfaces, respectively. The sorbent could facilitate the development of a single process for the simultaneous removal of cationic Hg and anionic Se as well as other similar ionic metals with opposite charges from aqueous media.
一种用于同时从水介质中去除 Hg 和 SeO 的复合吸附剂，是通过在活性炭存在下，溶剂热合成锆金属有机骨架 UiO-66 制备的。该复合吸附剂具有 1051m²/g 的大表面积和结晶多孔结构，热稳定性强，高达 600°C。吸附剂对污染物的吸收符合 Langmuir 吸附等温线，Hg 和 SeO 的最大吸附容量分别为 205mg/g 和 168mg/g。扫描电子显微镜-能谱分析结果表明，Se 区域仅与富含 Zr 的区域重叠，表明 SeO 的吸附完全取决于暴露的 UiO-66 表面。此外，Se 3d 和 Hg 4f 的 X 射线光电子能谱表明，SeO 和 Hg 分别与 UiO-66 和碳表面结合。该吸附剂可以促进开发一种单一的工艺，从水介质中同时去除阳离子 Hg 和阴离子 Se 以及其他具有相反电荷的类似离子金属。
