Cited by 214Adsorption and biosorption for pollutant removalRadioactive element chemistry and processingCoagulation and Flocculation Studies

The DOI matches its Crossref record; 59 of the 59 references it cites were found in a registry or an index.

Graphene oxide encapsulated polyvinyl alcohol/sodium alginate hydrogel microspheres for Cu (II) and U (VI) removal

Yi, Xiaofeng, Sun, Fuliang, Han, Zhenhua, Han, Fuhao, He, Jiarui, Ou, Minrui, Gu, Junjie, Xu, Xiaoping·2018·Ecotoxicology and Environmental Safety

Abstract

In this work, a novel sodium alginate (SA)/polyvinyl alcohol (PVA)/graphene oxide (GO) hydrogel microspheres were prepared by a simple method. Sodium alginate was physically crosslinked by Ca 2+; GO was encapsulated into the composite to strengthen the hydrogels; PVA played a significant role in well dispersing of GO in SA. The SA/PVA/GO (SPG) hydrogels were employed as an efficient adsorbent for removal of Cu (II) and U (VI) from aqueous solution. Batch experiments with the subject of the pH, initial metal ion concentration, competing ions and contact time were investigated. Structure characterization was successfully conducted by FTIR, SEM, EDX, BET and XPS. Furthermore, the sorption kinetics of Cu 2+ and UO 22+ followed pseudo-second order model and exhibited 3-stage intraparticle diffusion model. Equilibrium data were best described by Langmuir model and the obtained maximum adsorption capacities of SPG hydrogel microspheres for Cu 2+ and UO 22+ were 247.16 and 403.78 mg/g, respectively. The difference in adsorption capacity can be confirmed by the percentage of elements in EDX spectra and the intension of peak of elements in XPS spectra. The SPG sorbent exhibited excellent reusability after 5 adsorption-desorption cycles. All results suggested that the prepared adsorbents could be considered as effective and promising materials for removal of Cu (II) and U (VI) in wastewater.

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Crossref · 10.1016/j.ecoenv.2018.04.039

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Metadata

Authors
Yi, X., Sun, F., Han, Z., Han, F., He, J., Ou, M., Gu, J., & Xu, X.
Affiliations
Fuzhou University (CN)
Corresponding author
  • Yi, Xiaofeng
  • Xu, Xiaoping
Venue
Ecotoxicology and Environmental Safety
Publisher
Elsevier BV
Published
2018-08
Volume
158
Pages
309-318
ISSN
0147-6513 (ISSN-L)
OpenAlex
W2802970574
Cited by
214
References
59
Citations by year
2026: 14 · 2025: 20 · 2024: 31 · 2023: 30 · 2022: 32 · 2021: 36 · 2020: 23 · 2019: 21 · 2018: 7
FWCI
9.51
Type
journal article
Language
en
Open access
closed
Locations
  • Ecotoxicology and Environmental Safety (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
  • Physical Sciences › Chemistry › Inorganic Chemistry › Radioactive element chemistry and processing
  • Physical Sciences › Environmental Science › Water Science and Technology › Coagulation and Flocculation Studies
Keywords
graphene oxide, polyvinyl alcohol, sodium alginate, hydrogel microspheres, heavy metal adsorption, copper removal, uranium removal, adsorption kinetics, adsorption isotherms, adsorbent reusability, wastewater treatment, calcium crosslinking
MeSH terms
Alginates, Copper, Graphite, Hexuronic Acids, Hydrogen-Ion Concentration, Microspheres, Oxides, Polyvinyl Alcohol, Uranium, Uranium Compounds, Hydrogels, Glucuronic Acid, Wastewater

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