TY - JOUR
T1 - Rapid removal of heavy metal cations and anions from aqueous solutions by an amino-functionalized magnetic nano-adsorbent
AU - Huang, Shih Hung
AU - Chen, Dong Hwang
N1 - Funding Information:
This work was performed under the auspices of the National Science Council of the Republic of China, under contract number NSC94-2214-E006-006, to which the authors wish to express their thanks.
PY - 2009/4/15
Y1 - 2009/4/15
N2 - A novel magnetic nano-adsorbent has been developed by the covalent binding of polyacrylic acid (PAA) on the surface of Fe3O4 nanoparticles and the followed amino-functionalization using diethylenetriamine (DETA) via carbodiimide activation. Transmission electron microscopy image showed that the amino-functionalized Fe3O4 nanoparticles were quite fine with a mean diameter of 11.2 ± 2.8 nm. X-ray diffraction analysis indicated that the binding process did not result in the phase change of Fe3O4. Magnetic measurement revealed they were nearly superparamagnetic with a saturation magnetization of 63.2 emu/g Fe3O4. The binding of DETA on the PAA-coated Fe3O4 nanoparticles was demonstrated by the analyses of Fourier transform infrared (FTIR) spectroscopy and zeta potential. After amino-functionalization, the isoelectric point of PAA-coated Fe3O4 nanoparticles shifted from 2.64 to 4.59. The amino-functionalized magnetic nano-adsorbent shows a quite good capability for the rapid and efficient adsorption of metal cations and anions from aqueous solutions via the chelation or ion exchange mechanisms. The studies on the adsorption of Cu(II) and Cr(VI) ions revealed that both obeyed the Langmuir isotherm equation. The maximum adsorption capacities and Langmuir adsorption constants were 12.43 mg/g and 0.06 L/mg for Cu(II) ions and 11.24 mg/g and 0.0165 L/mg for Cr(VI) ions, respectively.
AB - A novel magnetic nano-adsorbent has been developed by the covalent binding of polyacrylic acid (PAA) on the surface of Fe3O4 nanoparticles and the followed amino-functionalization using diethylenetriamine (DETA) via carbodiimide activation. Transmission electron microscopy image showed that the amino-functionalized Fe3O4 nanoparticles were quite fine with a mean diameter of 11.2 ± 2.8 nm. X-ray diffraction analysis indicated that the binding process did not result in the phase change of Fe3O4. Magnetic measurement revealed they were nearly superparamagnetic with a saturation magnetization of 63.2 emu/g Fe3O4. The binding of DETA on the PAA-coated Fe3O4 nanoparticles was demonstrated by the analyses of Fourier transform infrared (FTIR) spectroscopy and zeta potential. After amino-functionalization, the isoelectric point of PAA-coated Fe3O4 nanoparticles shifted from 2.64 to 4.59. The amino-functionalized magnetic nano-adsorbent shows a quite good capability for the rapid and efficient adsorption of metal cations and anions from aqueous solutions via the chelation or ion exchange mechanisms. The studies on the adsorption of Cu(II) and Cr(VI) ions revealed that both obeyed the Langmuir isotherm equation. The maximum adsorption capacities and Langmuir adsorption constants were 12.43 mg/g and 0.06 L/mg for Cu(II) ions and 11.24 mg/g and 0.0165 L/mg for Cr(VI) ions, respectively.
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U2 - 10.1016/j.jhazmat.2008.06.075
DO - 10.1016/j.jhazmat.2008.06.075
M3 - Article
C2 - 18657903
AN - SCOPUS:58249131263
SN - 0304-3894
VL - 163
SP - 174
EP - 179
JO - Journal of Hazardous Materials
JF - Journal of Hazardous Materials
IS - 1
ER -