Novel thymine-functionalized MIL-101 prepared by post-synthesis and enhanced removal of Hg(2+) from water

Journal of Hazardous Materials
Xubiao LuoShenglian Luo

Abstract

A novel thymine-functionalized MIL-101 (MIL-101-Thymine) material was synthesized using a post-synthesis method to remove mercury at a high efficiency. MIL-101-Thymine was successfully prepared in this work and was confirmed by several characterization methods, such as (13)C nuclear magnetic resonance, X-ray diffraction, and infrared spectroscopy. The Hg(2+) adsorption agreed well with the Langmuir model, and the maximum adsorption capacity was 51.27mg/g. The adsorption rate fit with the pseudo-second-order kinetic model. Furthermore, MIL-101-Thymine exhibited excellent selectivity towards Hg(2+) over other cations, and the maximum value of the selective coefficient reached 947.34; this result is very likely due to the highly selective interactions of T-Hg(2+)-T in MIL-101-Thymine. The result of X-ray photoelectron spectroscopy also showed that Hg(2+) was coordinated with the N of thymine in MIL-101-Thymine. Moreover, the results of the thermogravimetric analysis and adsorption experiments showed that the Hg atom was two-coordinated with the thymine group. MIL-101-Thymine was used to remove trace Hg(2+) in real water samples, and satisfactory recoveries were obtained.

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Citations

Oct 13, 2016·Chemosphere·Patricia Balderas-HernándezJorge Juárez-Gómez
Sep 26, 2020·Environmental Science and Pollution Research International·Lata RaniPooja Mahajan
Jul 22, 2018·Chemical Communications : Chem Comm·Sergio RoyuelaJosé L Segura
Jul 31, 2019·Chemical Reviews·Pei-Long WangHong-Cai Zhou
Jan 4, 2019·Environmental Pollution·Yihan WuXiangke Wang

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