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Bismuth oxymetallate-modified biochar derived from Euryale ferox husk for efficient removal of Congo red from wastewater : adsorption behavior and mechanisms

Zhang, Luxin ; Li, Qunshuai ; Liu, Xiaobing ; Shi, Weiwei and Yu, Han LU (2024) In Environmental Science and Pollution Research
Abstract

Using Euryale ferox husk as raw material, pristine biochar (EBC), Bi2MoO6-modified biochar (BM-EBC), and BiFeO3-modified biochar (BF-EBC) were prepared and employed for decontaminating Congo red (CR) from wastewater. Compared with EBC (217.59 mg/g) and BF-EBC (359.49 mg/g), a superior adsorption capacity of 460.77 mg/g was achieved by BM-EBC. Based on the evaluation results of the Freundlich and pseudo-second-order models, multilayer chemisorption was suggested as the adsorption mechanism. The adsorption process of BM-EBC was spontaneous and endothermic, and the rate-limiting step pertained to liquid film diffusion and intraparticle diffusion. The underlying removal mechanism was explored via SEM, BET,... (More)

Using Euryale ferox husk as raw material, pristine biochar (EBC), Bi2MoO6-modified biochar (BM-EBC), and BiFeO3-modified biochar (BF-EBC) were prepared and employed for decontaminating Congo red (CR) from wastewater. Compared with EBC (217.59 mg/g) and BF-EBC (359.49 mg/g), a superior adsorption capacity of 460.77 mg/g was achieved by BM-EBC. Based on the evaluation results of the Freundlich and pseudo-second-order models, multilayer chemisorption was suggested as the adsorption mechanism. The adsorption process of BM-EBC was spontaneous and endothermic, and the rate-limiting step pertained to liquid film diffusion and intraparticle diffusion. The underlying removal mechanism was explored via SEM, BET, FTIR, XPS, Raman spectra, and Zeta potential analyses. The introduction of bismuth oxymetallates with their high number of M–O (M: Bi, Mo, Fe) structural elements provided the adsorbent with enlarged surface areas and reinforced oxygen functional groups, thereby promoting pore filling, π-π interactions, hydrogen bonding, and complexation, leading to enhanced adsorption capacity. These results demonstrate that Euryale ferox husk biochar modified by bismuth oxymetallates has high prospects for valorizing biomass waste and removing CR from wastewater.

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author
; ; ; and
organization
publishing date
type
Contribution to journal
publication status
epub
subject
keywords
Biochar, Bismuth oxymetallate, Congo red, Euryale ferox husk, Modification, Removal
in
Environmental Science and Pollution Research
publisher
Springer
external identifiers
  • scopus:85189365681
  • pmid:38578591
ISSN
0944-1344
DOI
10.1007/s11356-024-33106-2
language
English
LU publication?
yes
id
29dc4a14-5414-4041-8ad2-8d9aca85c4d6
date added to LUP
2024-04-23 13:25:05
date last changed
2024-06-18 18:26:07
@article{29dc4a14-5414-4041-8ad2-8d9aca85c4d6,
  abstract     = {{<p>Using Euryale ferox husk as raw material, pristine biochar (EBC), Bi<sub>2</sub>MoO<sub>6</sub>-modified biochar (BM-EBC), and BiFeO<sub>3</sub>-modified biochar (BF-EBC) were prepared and employed for decontaminating Congo red (CR) from wastewater. Compared with EBC (217.59 mg/g) and BF-EBC (359.49 mg/g), a superior adsorption capacity of 460.77 mg/g was achieved by BM-EBC. Based on the evaluation results of the Freundlich and pseudo-second-order models, multilayer chemisorption was suggested as the adsorption mechanism. The adsorption process of BM-EBC was spontaneous and endothermic, and the rate-limiting step pertained to liquid film diffusion and intraparticle diffusion. The underlying removal mechanism was explored via SEM, BET, FTIR, XPS, Raman spectra, and Zeta potential analyses. The introduction of bismuth oxymetallates with their high number of M–O (M: Bi, Mo, Fe) structural elements provided the adsorbent with enlarged surface areas and reinforced oxygen functional groups, thereby promoting pore filling, π-π interactions, hydrogen bonding, and complexation, leading to enhanced adsorption capacity. These results demonstrate that Euryale ferox husk biochar modified by bismuth oxymetallates has high prospects for valorizing biomass waste and removing CR from wastewater.</p>}},
  author       = {{Zhang, Luxin and Li, Qunshuai and Liu, Xiaobing and Shi, Weiwei and Yu, Han}},
  issn         = {{0944-1344}},
  keywords     = {{Biochar; Bismuth oxymetallate; Congo red; Euryale ferox husk; Modification; Removal}},
  language     = {{eng}},
  publisher    = {{Springer}},
  series       = {{Environmental Science and Pollution Research}},
  title        = {{Bismuth oxymetallate-modified biochar derived from Euryale ferox husk for efficient removal of Congo red from wastewater : adsorption behavior and mechanisms}},
  url          = {{http://dx.doi.org/10.1007/s11356-024-33106-2}},
  doi          = {{10.1007/s11356-024-33106-2}},
  year         = {{2024}},
}