UiO-66-NH 和 UiO-66-NH/海绵的制备及其对水中 2,4-二氯苯氧乙酸的吸附。
Preparation of UiO-66-NH and UiO-66-NH/sponge for adsorption of 2,4-dichlorophenoxyacetic acid in water.
机构信息
Key Laboratory of Beijing on Regional Air Pollution Control, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, 100124, PR China.
Key Laboratory of Beijing on Regional Air Pollution Control, College of Environmental and Energy Engineering, Beijing University of Technology, Beijing, 100124, PR China.
出版信息
Ecotoxicol Environ Saf. 2020 May;194:110440. doi: 10.1016/j.ecoenv.2020.110440. Epub 2020 Mar 10.
MOFs are usually used as efficient adsorbents to remove specific pollutants in water. However, because of their poor water stability relatively small particle size, their application in adsorbing and removing pollutants from water is limited. In this paper, with nitrile rubber sponge as the substrate, UiO-66-NH/sponge composites were firstly in-situ synthesized and systematically evaluated UiO-66-NH as an adsorbent to remove 2,4-dichlorophenoxyacetic acid from water. This composite could not only remain the adsorption capacity for 2,4-dichlorophenoxyacetic acid of UiO-66-NH, but also was much more convenient for separation after the adsorption compared to UiO-66-NH. In addition, the mechanism of the adsorption of UiO-66-NH for 2,4-dichlorophenoxyacetic acid were discussed in detail. Electrostatic interaction between UiO-66-NH and 2,4-dichlorophenoxyacetic acid was the main adsorption mechanism. The adsorption was mainly suitable for Langmuir isotherm models, and its maximum adsorption capacity of 2,4-dichlorophenoxyacetic acid was 72.99 mg g.
金属有机骨架材料通常被用作高效吸附剂，以去除水中的特定污染物。然而，由于其较差的水稳定性和相对较小的粒径，其在吸附和去除水中污染物方面的应用受到限制。本文以丁腈橡胶海绵为基体，首次原位合成了 UiO-66-NH/海绵复合材料，并对 UiO-66-NH 作为吸附剂去除水中 2,4-二氯苯氧乙酸的性能进行了系统评价。与 UiO-66-NH 相比，该复合材料不仅保留了对 2,4-二氯苯氧乙酸的吸附能力，而且在吸附后更便于分离。此外，还详细讨论了 UiO-66-NH 对 2,4-二氯苯氧乙酸的吸附机理。UiO-66-NH 与 2,4-二氯苯氧乙酸之间的静电相互作用是主要的吸附机制。吸附更符合朗缪尔等温吸附模型，其对 2,4-二氯苯氧乙酸的最大吸附容量为 72.99mg/g。
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