期刊
BEILSTEIN JOURNAL OF NANOTECHNOLOGY
卷 8, 期 -, 页码 2680-2688出版社
BEILSTEIN-INSTITUT
DOI: 10.3762/bjnano.8.268
关键词
adsorption; copper (Cu) ions; graphene; isotherms; methylene blue
资金
- National Natural Science Foundation of China [51504080]
- National Natural Science Foundation of Hebei Province [E2017209178]
- Science and technology project of Hebei province [15214104D]
- National Natural Science Foundation of Hebei Education Department [QN2016088]
In this paper, novel L-lysine-modified graphene oxide (Lys-GO) was synthesized through amidation. The morphological and structural properties of Lys-GO were characterized using infrared spectrometry, scanning electronic microscopy and X-ray photoelectron spectroscopy. The as-prepared Lys-GO material was systematically investigated in a series of batch adsorption experiments for the removal of methylene blue (MB) and copper ions (Cu2+) from wastewater. These results showed that Lys-GO is a bifunctional adsorbent for the removal of dyes and metal ions, and excellent adsorption efficiency was obtained. The maximum adsorption capacities for MB dye and Cu2+ were 1679.1 mg/g and 186.9 mg/g at 35 degrees C, respectively. The kinetics of adsorption followed well the linear pseudo-second-kinetic model. The isotherm results indicated that MB adsorption can be described with the Langmuir isotherm model, while the adsorption of Cu2+ can be described with the Freundlich model. The excellent adsorption capacity indicated that the Lys-GO may be a promising adsorption material for the removal of environmental pollutants.
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