Journal
RSC ADVANCES
Volume 7, Issue 15, Pages 9079-9089Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c6ra27530c
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Funding
- Nation Natural Science Foundation of China [21475104]
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Magnetic graphene oxide modified with 1-amine-3-methyl imidazole chloride ionic liquid (LI-MGO) was prepared through chemical co-precipitation and modified using 1-amine-3-imidazolium chloride ionic liquid. The as-prepared LI-MGO was characterized using X-ray diffraction (XRD), transmission electron microscopy (TEM) and Fourier transform infrared spectrometry (FT-IR). The adsorption properties were evaluated through adsorption experiments with two kinds of anionic dyes, orange IV (OIV) and glenn black R (GR) and two kinds of cationic dyes, acridine orange (AO) and crystal violet (CV). The results indicated that the adsorption data fitted the Langmuir isotherm and followed pseudo-second-order kinetics. The maximum adsorption capacities for GR, OIV, AO and CV were 588.24, 57.37, 132.80 and 69.44 mg g(-1) at 298 K, respectively. LI-MGO has better selective adsorption for anionic dyes than magnetic graphene oxide (MGO) due to electrostatic interactions. Moreover, the LI-MGO adsorbent can be magnetic separated and is easy to prepare. It demonstrated that LI-MGO would have great potential as an efficient environmentally friendly adsorbent for the removal of anionic dyes in water treatment.
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