School of Textile Science and Engineering, Tiangong University, 399 Binshui West Road, Tianjin 300387, China.
School of Textile Science and Engineering, Tiangong University, 399 Binshui West Road, Tianjin 300387, China.
J Environ Manage. 2022 Nov 1;321:115972. doi: 10.1016/j.jenvman.2022.115972. Epub 2022 Aug 14.
Zeolitic imidazolate framework-67 (ZIF-67) formed by Co and 2-methylimidazole (MIM) is widely used for adsorption and separation of pollutants. However, there are some disadvantages for ZIF-67 powder, such as strong electrostatic interaction and difficulty in recovery from the liquid phase. The available way to solve the above problems is choosing a suitable substrate to load ZIF-67. The amino and hydroxyl of wool fabrics effectively capture and fix ZIF-67, making it easy to separate ZIF-67 by taking out the composite materials from aqueous solution. In this study, ZIF-67/Wool fabric (ZW) was successfully prepared. The results show that ZIF-67 has better adsorption performance for reactive dyes with more sulfonic groups, higher molecular weight and lower steric resistance. The equilibrium adsorption capacity of ZW for reactive red 195 was 4.15 mg g. The adsorption accorded with pseudo-second-order kinetic model and Langmuir isotherm. This study improved the application of ZIF-67, which provided a treatment method for dyeing wastewater and made it possible to recycle waste wool.
由钴和 2-甲基咪唑（MIM）形成的沸石咪唑酯骨架-67（ZIF-67）广泛用于吸附和分离污染物。然而，ZIF-67 粉末存在一些缺点，如强静电相互作用和难以从液相中回收。解决上述问题的可行方法是选择合适的基底来负载 ZIF-67。羊毛织物的氨基和羟基能有效地捕获和固定 ZIF-67，使复合材料很容易从水溶液中分离出来。本研究成功制备了 ZIF-67/羊毛织物（ZW）复合材料。结果表明，ZIF-67 对磺酸基更多、分子量更高、空间位阻更小的活性染料具有更好的吸附性能。ZW 对活性红 195 的平衡吸附容量为 4.15mg/g。吸附符合准二级动力学模型和 Langmuir 等温线。本研究提高了 ZIF-67 的应用价值，为处理染色废水提供了一种方法，同时也使废羊毛的回收成为可能。
