Open AccessEFFICIENT ADSORPTION OF Ce (III) ONTO POROUS CELLULOSE/GRAPHENE OXIDE COMPOSITE MICROSPHERES PREPARED IN IONIC LIQUID
Author(s) -
Hao Yan,
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Jing Qu,
ZUNYI LIU,
Songbo Li,
Hui Yang,
Huazheng Sai,
Huimin Yang,
Jing Peng,
Long Zhao,
Maolin Zhai,
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AUTHOR_ID,
AUTHOR_ID,
AUTHOR_ID,
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AUTHOR_ID,
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Publication year - 2021
Publication title -
cellulose chemistry and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.302
H-Index - 32
eISSN - 2457-9459
pISSN - 0576-9787
DOI - 10.35812/cellulosechemtechnol.2021.55.100
Subject(s) - adsorption , chemistry , ionic liquid , graphene , oxide , langmuir adsorption model , cellulose , chemical engineering , composite number , x ray photoelectron spectroscopy , ion exchange , inorganic chemistry , ion , organic chemistry , catalysis , materials science , composite material , engineering
A novel adsorbent made of porous cellulose/graphene oxide composite microspheres (PCGCM) was synthesized in [Bmim]Cl ionic liquid. The as-prepared PCGCM was evaluated for the removal of Ce (III) via static adsorption experiments. The results showed that the adsorption equilibrium of Ce (III) onto PCGCM was achieved within 50 min and the adsorption was highly pH dependent. An excellent adsorption capacity as high as 415.1 mg•g-1 was obtained at a pH of 4.9, which was much higher than most adsorbents reported in the literature. The pseudo-second order kinetic model and Langmuir isotherm model were found to fit the adsorption behavior of PCGCM well. The XPS analysis confirmed that the adsorption was based on the ion exchange mechanism. Meanwhile, PCGCM could be regenerated with 1 mol•L-1 HCl for repetitious adsorption of Ce (III). This work provides an attractive approach for the removal of rare earth ions as pollutants.