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High efficiency removal of triclosan by structure-directing agent modified mesoporous MIL-53(Al)
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High efficiency removal of triclosan by structure-directing agent modified mesoporous MIL-53(Al)
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Journal Article
High efficiency removal of triclosan by structure-directing agent modified mesoporous MIL-53(Al)
2017
Overview
In order to expand the potential applications of metal-organic frameworks (MOFs), structure directing agents modified mesoporous MIL-53(Al) (MIL-53(Al)-1) was investigated to adsorb triclosan (TCS) with two different initial concentrations. MIL-53(Al)-1 with high mesoporosity and total pore volume exhibited higher adsorption capacity and 4.4 times faster adsorption of TCS at low concentration (1 mg L
−1
) than that of microporous MIL-53(Al). Also, mesoporous as well as microporous MIL-53(Al) showed significant higher adsorption capacity and two orders of magnitude greater fast uptake of TCS than two kinds of mesoporous-activated carbon. The adsorption of TCS onto MIL-53(Al)-1 released more energy and had higher disorderliness than TCS on MIL-53(Al). The superior adsorption characteristics of MIL-53(Al)-1 were preserved over a wide pH range (4–9), at high concentration of ionic strengths, and in the presence of coexisting compounds (anions, cations, phenol, aniline, and humic acid). The selectivity adsorption and Fourier transform infrared (FT-IR) spectra revealed that TCS adsorption on MIL-53(Al)s was mainly driven by hydrophobicity interaction assisted with hydrogen bonding on MIL-53(Al)s. MIL-53(Al)s can be effectively regenerated several times by washing with 90% methanol-water (pH 11). All of the above results demonstrated MIL-53(Al)s are promising adsorbents for water purification.
Graphical abstract
Publisher
Springer Berlin Heidelberg,Springer Nature B.V
Subject
/ Aluminum
/ Aniline
/ Anions
/ Atmospheric Protection/Air Quality Control/Air Pollution
/ carbon
/ Cations
/ Coordination Complexes - chemistry
/ Earth and Environmental Science
/ energy
/ Fourier transform infrared spectroscopy
/ phenol
/ Phenols
/ Porosity
/ Spectroscopy, Fourier Transform Infrared
/ Structure-Activity Relationship
/ washing
/ Water Pollutants, Chemical - analysis
