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author:

Zhang, X. (Zhang, X..) [1] | Wang, W. (Wang, W..) [2] | Luo, S. (Luo, S..) [3] | Lin, Q. (Lin, Q..) [4]

Indexed by:

Scopus

Abstract:

A novel oxidized hollow carbon sphere (OHCS) as absorbent for the removal of Pb2+ was fabricated from the mixture of coal-tar pitch and aluminum isopropoxide followed by nitric acid oxidation. The as-prepared OHCSs were characterized by FESEM, TEM, BET, TG, FTIR and XPS, and meanwhile the effects of adsorption conditions on the Pb2+ removal were investigated by batch experiments. Results show that the OHCSs prepared possess discrete cage-like structures and well-defined inner/outer surface features, exhibiting vertically aligned graphene-like nanosheets on their surfaces with mesoporous nature and high hydrophobicity. The maximum absorption capacity for Pb2+ of the OHCSs can reach 280.79 mg g−1 at the optimum condition. The adsorption kinetic of Pb2+ onto the OHCSs was found to be well modeled by pseudo-second-order kinetic model, and the experimental equilibrium data were represented well by Langmuir isotherm model. Moreover, the OHCSs still exhibit excellent adsorption ability and stability after recycling 5 times, indicating its excellent reusability performance. Overall, the OHCS is a promising adsorbent for Pb2+ removal. © 2019 Elsevier Inc.

Keyword:

Acid treatment; Adsorption; Functionalization; Lead; Oxidized hollow carbon sphere

Community:

  • [ 1 ] [Zhang, X.]College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350116, China
  • [ 2 ] [Wang, W.]College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350116, China
  • [ 3 ] [Luo, S.]College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350116, China
  • [ 4 ] [Lin, Q.]College of Materials Science and Engineering, Fuzhou University, Fuzhou, 350116, China

Reprint 's Address:

  • [Lin, Q.]College of Materials Science and Engineering, Fuzhou UniversityChina

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Source :

Journal of Colloid and Interface Science

ISSN: 0021-9797

Year: 2019

Volume: 553

Page: 484-493

7 . 4 8 9

JCR@2019

9 . 4 0 0

JCR@2023

ESI HC Threshold:184

JCR Journal Grade:1

CAS Journal Grade:3

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 1

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