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Synthesis of poly(styrene-co-methacrylic acid)-coated magnetite nanoparticles as effective adsorbents for the removal of crystal violet and Rhodamine B: a comparative study
被引:15
作者:
Hayasi, Mozhgan
[1
]
Karimi, Mohammad
[2
]
机构:
[1] Semnan Univ, Dept Appl Chem, Fac Chem, Semnan, Iran
[2] Amirkabir Univ Technol, Dept Text Engn, Hafez Ave, Tehran 15914, Iran
关键词:
Poly(styrene-co-methacrylic acid);
Miniemulsion polymerization;
Surface modification;
Magnetic nanoparticle;
Adsorption;
AQUEOUS-SOLUTION;
DYE REMOVAL;
MINIEMULSION POLYMERIZATION;
THERMAL-DECOMPOSITION;
ACTIVATED CARBON;
CATIONIC DYES;
ANIONIC DYES;
ADSORPTION;
WATER;
SHELL;
D O I:
10.1007/s00289-016-1816-y
中图分类号:
O63 [高分子化学(高聚物)];
学科分类号:
070305 ;
080501 ;
081704 ;
摘要:
In this work, Fe3O4/Poly(styrene-co-methacrylic acid) (St-co-MAA) particles with different particle sizes (20 and 255 nm) were synthesized by miniemulsion polymerization via two routes. The synthesized particles were used as adsorbents for the removal of crystal violet (CV) and Rhodamine B (RB) from water solution. The as-prepared adsorbents were characterized by Fourier transform infrared (FT-IR) spectra, transmission electron microscope (TEM), vibrating sample magnetometer (VSM), X-ray diffraction (XRD), and thermogravimetric analysis (TGA). Magnetic measurements revealed that the obtained Fe3O4/Poly(St-co-MAA) with small particle size (20 nm) has superparamagnetism properties. The effects of various factors on the adsorption capacity, such as contact time, pH of dyes solution, and initial dyes concentration were investigated. The studies showed that the experimental data are fitted well with Langmuir model, indicating homogeneous monolayer adsorption process. Adsorption kinetics of Fe3O4/Poly(St-co-MAA) were well explained by the pseudo-second-order model, suggesting a chemical adsorption process. The maximum adsorption capacities (q(m)) of CV and RB onto Fe3O4/Poly(St-co-MAA) with small particles size were 416.66 and 69.54 mg g(-1), respectively, which were much higher than the adsorption capacities of adsorbent with large particle sizes (q(m) of CV = 207.9 and q(m) of RB = 38.91 mg g(-1)). The dye-adsorbed magnetic Poly(St-co-MAA) could be easily desorbed and reused for at least four cycles with a little decrease in adsorption capacity.
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页码:1995 / 2016
页数:22
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