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Removal of Pb(ii) ions from aqueous solutions on few-layered graphene oxide nanosheets

Zhao, Guixia, Ren, Xuemei, Gao, Xing, Tan, Xiaoli, Li, Jiaxing, Chen, Changlun, Huang, Yuying, Wang, Xiangke·2011·Dalton Transactions

Abstract

Few-layered graphene oxide (FGO) was synthesized from graphite by using the modified Hummers method, and was characterized by scanning electron microscopy, atomic force microscopy, powder X-ray diffraction, X-ray photoelectron spectroscopy and Raman spectroscopy. The prepared FGO was used to adsorb Pb(II) ions from aqueous solutions. The abundant oxygen-containing groups on the surfaces of FGO played an important role in Pb(II) ion adsorption on FGO. The adsorption of Pb(II) ions on FGO was dependent on pH values and independent of ionic strength. The adsorption of Pb(II) ions on FGO was mainly dominated by strong surface complexation. From the adsorption isotherms, the maximum adsorption capacities (C(smax)) of Pb(II) ions on FGO calculated from the Langmuir model were about 842, 1150, and 1850 mg g(-1) at 293, 313, and 333 K, respectively, higher than any currently reported. The FGO had the highest adsorption capacities of today's nanomaterials. The thermodynamic parameters calculated from the temperature dependent adsorption isotherms indicated that the adsorption of Pb(II) ions on FGO was a spontaneous and endothermic process.

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Metadata

Authors
Zhao, G., Ren, X., Gao, X., Tan, X., Li, J., Chen, C., Huang, Y., & Wang, X.
Venue
Dalton Transactions
Published
2011
Volume
40
Issue
41
Pages
10945
ISSN
  • 1477-9226 (ISSN-L)
  • 1477-9234
OpenAlex
W2036330748
Cited by
563
References
1
FWCI
32.65
Type
journal article
Language
en
Open access
closed

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CoChat. (2026). Citation check: Removal of Pb(ii) ions from aqueous solutions on few-layered graphene oxide nanosheets. https://app.cochat.ai/papers/10.1039/c1dt11005e
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Zhao, G., Ren, X., Gao, X., Tan, X., Li, J., Chen, C., Huang, Y., & Wang, X. (2011). Removal of Pb(ii) ions from aqueous solutions on few-layered graphene oxide nanosheets. Dalton Transactions. https://doi.org/10.1039/c1dt11005e

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