Journal
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
Volume 194, Issue -, Pages 76-82Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.saa.2018.01.010
Keywords
Thorium; Zirconium-based metal-organic framework; UiO-66-OH; olid-phase extraction; Water analysis; Spectrophotometry
Categories
Ask authors/readers for more resources
In this study, a zirconium-based metal-organic framework (Zr-MOF), named UiO-66-OH, was synthesized by the solvo-thermal method and characterized by Fourier transform-infrared spectroscopy (FTIR), powder X-ray diffraction (PXRD), and scanning electron microscopy (SEM). This Zr-MOF was then employed as a sorbent for selective extraction and preconcentration of thorium ions after their complexation with 2 (2,4 dihydroxyphenyl) 3,5,7 trihydroxychromen 4 one (morin) from environmental water samples prior to its spectrophotometrical determination. The experimental parameters affecting extraction, such as pH of sample solution, amount of Zr-MOF, type and volume of eluting solvent, adsorption and desorption time, and concentration of complexing agent were evaluated and optimized. Under the optimized conditions, an enrichment factor of 250 was achieved. The limit of detection was calculated to be 0.35 mu g.L-1 with a linear range between 10 and 2000 mu g.L-1 ofthorium. The maximum sorption capacity of MOF toward. thorium was found to be 47.5 mg.g(-1). The proposed procedure was successfully applied to the analysis of real water samples. (C) 2018 Elsevier B.V. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available