一种用异烟酸功能化的锆基金属有机框架材料MOF-808的合成、表征及其在分光光度法测定废水中铀(VI)之前用于快速高效固相萃取的应用。
Synthesis, characterization and application of a zirconium-based MOF-808 functionalized with isonicotinic acid for fast and efficient solid phase extraction of uranium(VI) from wastewater prior to its spectrophotometric determination.
作者信息
Sharifi-Rad Marzieh, Kaykhaii Massoud, Khajeh Mostafa, Oveisi Alireza
机构信息
Department of Chemistry, Faculty of Sciences, University of Sistan and Baluchestan, Zahedan, Iran.
Department of Process Engineering and Chemical Technology, Faculty of Chemistry, Gdansk University of Technology, Gdansk, Poland.
出版信息
BMC Chem. 2022 Apr 16;16(1):27. doi: 10.1186/s13065-022-00821-1.
BACKGROUND
A zirconium-based metal-organic framework (Zr-MOF), named MOF-808, was synthesized and fully characterized by solvo-thermal method and functionalized by isonicotinic acid and employed as an efficient adsorbent for selective extraction and preconcentration of uranyl ions from water and waste water samples in a batch solid phase extraction.
RESULTS
Parameters affecting extraction such as volume and pH of the sample solution, the amount of sorbent, type and volume of eluting solvent, and adsorption and desorption times were investigated and optimized. Under the optimized conditions, high extraction efficiency was observed with a limit of detection of 0.9 µg L for uranyl ions and relative standard deviations were found to be better than 2.1% in the range of 0.07-1000 µg L.
CONCLUSIONS
These results indicated that the above procedure is fast, inexpensive, effective, reliable, applicable and organic solvent-free and showed the highly performance and stability of the Zr-MOF in SPE based analytical techniques.
背景
通过溶剂热法合成了一种名为MOF-808的锆基金属有机框架材料（Zr-MOF），并对其进行了全面表征，用异烟酸对其进行功能化处理，将其用作高效吸附剂，通过分批固相萃取从水和废水样品中选择性萃取和预富集铀酰离子。
结果
研究并优化了影响萃取的参数，如样品溶液的体积和pH值、吸附剂用量、洗脱溶剂的类型和体积以及吸附和解吸时间。在优化条件下，铀酰离子的萃取效率高，检测限为0.9 μg/L，在0.07 - 1000 μg/L范围内相对标准偏差优于2.1%。
结论
这些结果表明上述方法快速、廉价、有效、可靠、适用且无有机溶剂，显示了Zr-MOF在基于固相萃取的分析技术中的高性能和稳定性。
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