Journal
ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
Volume 24, Issue 9, Pages 8778-8789Publisher
SPRINGER HEIDELBERG
DOI: 10.1007/s11356-017-8583-7
Keywords
Triclosan; Selectivity adsorption; Low concentration; Structure-directing agents modified; Mesoporous MIL-53(Al); Promising adsorbents; Hydrophobicity interaction
Categories
Funding
- National Nature Science Foundation of China [21677052]
- Major Science and Technology Program for the Industry-Academia-Research Collaborative Innovation [201604010043, 201605122301117]
- Guangdong Province Science and Technology Project [2016B090918104, 2013B090200016, 2015B020215007, 2015B020235009, 2016B020240005]
- Joint fund of Guangdong Province [U1401235]
- State Key Laboratory of Pulp and Paper Engineering [2016C03]
- Zhanjiang of Guangdong Energy Co. [ZY-KJ-YX-2016X085F]
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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.
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