TY - JOUR
T1 - Selective adsorption of metronidazole on conjugated microporous polymers
AU - Zheng, Chunli
AU - Du, Miaomiao
AU - Li, Fei
AU - Qi, Yue
AU - Yi, Jun
N1 - Publisher Copyright:
© 2015 Science China Press and Springer-Verlag Berlin Heidelberg.
PY - 2015/7/29
Y1 - 2015/7/29
N2 - Conjugated microporous polymers (CMPs) have recently received extensive attention in oil/organic solvent-water separation field as a kind of ideal porous absorbents with tunable porosity, large surface areas, and super-hydrophobicity. However, reports on the application of CMPs in adsorption of hydrophilic contaminants from water are very few. In this work, we studied the adsorption of metronidazole (MNZ), a polar antibiotic, by two kinds of CMPs. The adsorption characteristics of MNZ by the CMPs, including adsorption kinetics, mechanism, and isotherm parameters were calculated. The adsorption kinetics of MNZ was well expressed by the pseudo-second-order model, and the adsorption process was found to be mainly controlled by film diffusion. The adsorption isotherm data agreed well with the Langmuir isotherm model, and the values of free energy E indicated that the adsorption nature of MNZ on the CMPs was physisorption. Increasing dispersion degree of the CMPs in MNZ solution resulted in greater adsorption. This work may provide fundamental guidance for the removal of antibiotics by CMPs.
AB - Conjugated microporous polymers (CMPs) have recently received extensive attention in oil/organic solvent-water separation field as a kind of ideal porous absorbents with tunable porosity, large surface areas, and super-hydrophobicity. However, reports on the application of CMPs in adsorption of hydrophilic contaminants from water are very few. In this work, we studied the adsorption of metronidazole (MNZ), a polar antibiotic, by two kinds of CMPs. The adsorption characteristics of MNZ by the CMPs, including adsorption kinetics, mechanism, and isotherm parameters were calculated. The adsorption kinetics of MNZ was well expressed by the pseudo-second-order model, and the adsorption process was found to be mainly controlled by film diffusion. The adsorption isotherm data agreed well with the Langmuir isotherm model, and the values of free energy E indicated that the adsorption nature of MNZ on the CMPs was physisorption. Increasing dispersion degree of the CMPs in MNZ solution resulted in greater adsorption. This work may provide fundamental guidance for the removal of antibiotics by CMPs.
KW - adsorption
KW - conjugated microporous polymer
KW - hydrophobicity
KW - metronidazole
UR - https://www.scopus.com/pages/publications/84923925065
U2 - 10.1007/s11426-015-5334-9
DO - 10.1007/s11426-015-5334-9
M3 - 文章
AN - SCOPUS:84923925065
SN - 1674-7291
VL - 58
SP - 1227
EP - 1234
JO - Science China Chemistry
JF - Science China Chemistry
IS - 7
ER -