Metal–organic framework sorbents for the removal of perfluorinated compounds in an aqueous environment†,New Journal of Chemistry

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Metal–organic framework sorbents for the removal of perfluorinated compounds in an aqueous environment†
New Journal of Chemistry ( IF 2.7 ) Pub Date : 2018-09-24 00:00:00 , DOI: 10.1039/c8nj03312a
Karima Sini _{1,

2,

3,

4,

5} , Damien Bourgeois _{1,

2,

3,

4,

5} , Madjid Idouhar _{6,

7,

8,

9} , Michaël Carboni _{1,

2,

3,

4,

5} , Daniel Meyer _{1,

2,

3,

4,

5}

Affiliation

Special attention is paid to synthetic anionic surfactants, particularly the perfluorooctane sulfonate (PFOS) and perfluorooctanoate (PFOA) anions (denoted as PFOX), due to their persistence in aquatic environments and the high toxicity of these surfactants. Two metal organic frameworks (MOFs) based on Zr-oxo clusters, UiO-66 and the equivalent perfluorinated UiO-66-(F4), were prepared and tuned for the selective adsorption of PFOA and PFOS from an aqueous solution. The MOFs have been characterized by powder X-ray diffraction, thermogravimetric analysis, infra-red spectroscopy, and BET measurement and their efficiency for the uptake of PFOX has been determined. The influence of several parameters such as the kinetics, the m/V ratio or the temperature on the adsorption capacity was investigated. These two porous MOFs have been revealed to be excellent materials for the removal of these pollutants with saturation sorption capacities of around 470 mg g⁻¹ under some conditions. The fluorinated MOF cavity of UiO-66-(F4) has been revealed to increase the affinity for the sorption of fluorinated pollutants due to the fluorine–fluorine interactions without changing drastically the saturation capacity compared to UiO-66. These results indicate that Zr-MOFs provide a promising platform for the removal of fluorinated organic pollutants from aqueous solutions.

中文翻译：

金属-有机骨架吸附剂，用于在水性环境中去除全氟化合物†

由于它们在水环境中的持久性以及这些表面活性剂的高毒性，因此特别注意合成阴离子表面活性剂，特别是全氟辛烷磺酸根（PFOS）和全氟辛酸根（PFOA）阴离子（表示为PFOX）。制备了两种基于Zr-氧代簇的金属有机骨架（MOF），UiO-66和等效的全氟化UiO-66-（F4），并进行了调整，以从水溶液中选择性吸附PFOA和PFOS。通过粉末X射线衍射，热重分析，红外光谱和BET测量对MOF进行了表征，并确定了其吸收PFOX的效率。研究了动力学，m / V比或温度等几个参数对吸附容量的影响。^-1在某些情况下。已经发现，由于氟与氟的相互作用，UiO-66-（F4）的氟化MOF腔增加了吸附氟污染物的亲和力，而与UiO-66相比，饱和容量没有显着变化。这些结果表明，Zr-MOF为从水溶液中去除氟化有机污染物提供了一个有前途的平台。

更新日期：2018-09-24

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