TY - JOUR
T1 - Enhanced adsorption of Orange G from aqueous solutions by quaternary ammonium group-rich magnetic nanoparticles
AU - Zheng, Xinyu
AU - Zheng, Huaili
AU - Zhou, Yuhao
AU - Sun, Yongjun
AU - Zhao, Rui
AU - Liu, Yongzhi
AU - Zhang, Shixin
N1 - Publisher Copyright:
© 2019 Elsevier B.V.
PY - 2019/11/5
Y1 - 2019/11/5
N2 - Wastewater containing dyes poses a severe threat to human health and to environmental safety. Hence, finding an effective way to treat this wastewater has attracted wide attentions. In this study, quaternary ammonium group-rich magnetic nanoparticles (MNPs), Fe3O4@SiO2-MPS-g-DAC (FSMD), were facilely prepared by grafting polymerization and served as a cationic adsorbent to remove anionic dye Orange G from aqueous solutions. Being compared with Fe3O4@SiO2-MPS MNPs, the adsorption capacity of FSMD MNPs was notably enhanced and it could be maintained in a high level under a wide solution pH range. The dependency on pH and the sensitivity to ionic strength indicated that the main adsorption mechanism was the electrostatic interaction. The adsorption kinetics followed the pseudo-second-order model, and the adsorption isotherms were well described with the Langmuir model. According to the thermodynamic analysis, the adsorption process was spontaneous and endothermic. FSMD MNPs were proved to have advantages of fast adsorption rate, high adsorption capacity, easy separation ability under external magnetic field, and satisfactory reusability, therefore they can be applied in the removal of anionic dyes from wastewater.
AB - Wastewater containing dyes poses a severe threat to human health and to environmental safety. Hence, finding an effective way to treat this wastewater has attracted wide attentions. In this study, quaternary ammonium group-rich magnetic nanoparticles (MNPs), Fe3O4@SiO2-MPS-g-DAC (FSMD), were facilely prepared by grafting polymerization and served as a cationic adsorbent to remove anionic dye Orange G from aqueous solutions. Being compared with Fe3O4@SiO2-MPS MNPs, the adsorption capacity of FSMD MNPs was notably enhanced and it could be maintained in a high level under a wide solution pH range. The dependency on pH and the sensitivity to ionic strength indicated that the main adsorption mechanism was the electrostatic interaction. The adsorption kinetics followed the pseudo-second-order model, and the adsorption isotherms were well described with the Langmuir model. According to the thermodynamic analysis, the adsorption process was spontaneous and endothermic. FSMD MNPs were proved to have advantages of fast adsorption rate, high adsorption capacity, easy separation ability under external magnetic field, and satisfactory reusability, therefore they can be applied in the removal of anionic dyes from wastewater.
KW - Acryloyloxyethyltrimethyl ammonium chloride
KW - Adsorption
KW - Magnetic nanoparticles
KW - Orange G
KW - Quaternary ammonium group
UR - http://www.scopus.com/inward/record.url?scp=85070859249&partnerID=8YFLogxK
U2 - 10.1016/j.colsurfa.2019.123746
DO - 10.1016/j.colsurfa.2019.123746
M3 - 文章
AN - SCOPUS:85070859249
SN - 0927-7757
VL - 580
JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects
JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects
M1 - 123746
ER -
