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Metal‐based ionic liquid assisted synthesis of highly dispersed mesoporous Fe(III)/SiO 2 for enhanced adsorption of antibiotics
Author(s) -
Chao Yanhong,
Jin Yan,
Jiang Wenjuan,
Chen LinLin,
Li Xiaowei,
Luo Jing,
Pang Jingyu,
Li Huaming,
Zhu Wenshuai
Publication year - 2019
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.6130
Subject(s) - adsorption , mesoporous material , aqueous solution , metal , mesoporous silica , chemical engineering , ionic strength , ionic liquid , langmuir adsorption model , chemistry , tetracycline antibiotics , inorganic chemistry , materials science , catalysis , organic chemistry , tetracycline , biochemistry , antibiotics , engineering
BACKGROUND Silica‐based adsorbents have shown huge potential and bright perspective in adsorptive removal of antibiotic contaminants for water remediation. To further simplify the synthesis process, stabilize the doped metal and improve the adsorption capacity, a highly‐effective metal iron‐doped mesoporous silica (meso‐Fe(III)/SiO 2 ) adsorbent was in situ one‐step synthesized under the strategy of using metal‐based ionic liquid [(C 12 H 25 ) 3 NCH 3 ]FeCl 4 as template and iron source. RESULTS Iron(III) species have been found highly dispersed in the confined space of meso‐SiO 2 without pore blocking . Compared with the prototype and Fe‐impregnate meso‐SiO 2 adsorbents, the meso‐Fe(III)/SiO 2 exhibited significantly enhanced adsorptive removal of 95.6% and 93.8% for tetracycline (TC) and levofloxacin (LOF), respectively. The adsorption was controlled by diffusion processes and well described by pseudo‐second‐order kinetics equation and Langmuir isotherm model. Solution pH, co‐existing Na + and Ca 2+ exhibited significant impact on the adsorption process which is strongly related to π‐complexation, hydrophobic effect and electrostatic interactions. CONCLUSION The strategy of metal‐based ionic liquid assisted synthesis provide a promising approach to design and develop highly‐stable metal‐supported adsorbents. Furthermore, the excellent adsorption performance indicated the potential application of this meso‐Fe(III)/SiO 2 in the removal of antibiotics from aqueous solutions. © 2019 Society of Chemical Industry