Fabrication and characterization of a novel Ba2+-loaded sawdust biochar doped with iron oxide for the super-adsorption of SO42− from wastewater

Warda Khalid; Chin Kui Cheng; Peng Liu; Jinping Tang; Xin Liu; Asmat Ali; Asfandyar Shahab; Xingjie Wang

doi:10.1016/j.chemosphere.2022.135233

Fabrication and characterization of a novel Ba²⁺-loaded sawdust biochar doped with iron oxide for the super-adsorption of SO₄²⁻ from wastewater

Warda Khalid, Chin Kui Cheng, Peng Liu, Jinping Tang, Xin Liu, Asmat Ali, Asfandyar Shahab, Xingjie Wang

Chemical and Petroleum Engineering

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

Biochar is a low-cost adsorbent used in the treatment of contaminated wastewater. We investigated the potential of an Fe-impregnated, Ba²⁺-loaded biochar (Fe-(Ba-BC)) for the removal of SO₄²⁻ from aqueous solutions. The Ba²⁺-loaded biochar was synthesized from sawdust impregnated with iron oxide via pyrolysis at 600 °C. The porous structure of the Fe-(Ba-BC) was identified by scanning electron microscopy before sulfate was adsorbed onto the adsorbent. Functional groups were determined by energy-dispersive spectrophotometry and Raman spectrometry. The Fe-(Ba-BC) Raman peaks before the experiment were higher than after, suggesting the precipitation of BaSO₄. The presence of BaCl₂ on the surface of the biochar was confirmed by X-ray diffraction. Batch sorption results showed that Fe-(Ba-BC) strongly adsorbed aqueous SO₄²⁻ with a removal efficacy of 96.7% under the optimum conditions of 0.25 M BaCl₂, a contact time of 480 min, a pH of 9 and an adsorbent dose of 2 g. The optimum condition for removal and reaction rate kinetics analysis indicated that adsorption curve fitted well with PSO, k₂ 0.00015 confirmed the removal of SO₄²⁻ via chemisorption. Thus, Fe-(Ba-BC) was found to be a favorable adsorbent for removing SO₄²⁻.

Original language	British English
Article number	135233
Journal	Chemosphere
Volume	303
DOIs	https://doi.org/10.1016/j.chemosphere.2022.135233
State	Published - Sep 2022

Keywords

Activated biochar
Adsorption kinetics
Chemisorption
Sulfate removal
Wastewater treatment

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10.1016/j.chemosphere.2022.135233

Cite this

@article{501ef7a2d78e4ef0adde8dca9345f197,

title = "Fabrication and characterization of a novel Ba2+-loaded sawdust biochar doped with iron oxide for the super-adsorption of SO42− from wastewater",

abstract = "Biochar is a low-cost adsorbent used in the treatment of contaminated wastewater. We investigated the potential of an Fe-impregnated, Ba2+-loaded biochar (Fe-(Ba-BC)) for the removal of SO42− from aqueous solutions. The Ba2+-loaded biochar was synthesized from sawdust impregnated with iron oxide via pyrolysis at 600 °C. The porous structure of the Fe-(Ba-BC) was identified by scanning electron microscopy before sulfate was adsorbed onto the adsorbent. Functional groups were determined by energy-dispersive spectrophotometry and Raman spectrometry. The Fe-(Ba-BC) Raman peaks before the experiment were higher than after, suggesting the precipitation of BaSO4. The presence of BaCl2 on the surface of the biochar was confirmed by X-ray diffraction. Batch sorption results showed that Fe-(Ba-BC) strongly adsorbed aqueous SO42− with a removal efficacy of 96.7\% under the optimum conditions of 0.25 M BaCl2, a contact time of 480 min, a pH of 9 and an adsorbent dose of 2 g. The optimum condition for removal and reaction rate kinetics analysis indicated that adsorption curve fitted well with PSO, k2 0.00015 confirmed the removal of SO42− via chemisorption. Thus, Fe-(Ba-BC) was found to be a favorable adsorbent for removing SO42−.",

keywords = "Activated biochar, Adsorption kinetics, Chemisorption, Sulfate removal, Wastewater treatment",

author = "Warda Khalid and Cheng, \{Chin Kui\} and Peng Liu and Jinping Tang and Xin Liu and Asmat Ali and Asfandyar Shahab and Xingjie Wang",

note = "Funding Information: This work was supported by the National Natural Science Foundation of China [grant number 41877478 ], and the Fundamental Research Funds for the Central Universities ( China University of Geosciences (Wuhan) [grant number CUGGC06 ]). Publisher Copyright: {\textcopyright} 2022",

year = "2022",

month = sep,

doi = "10.1016/j.chemosphere.2022.135233",

language = "British English",

volume = "303",

journal = "Chemosphere",

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TY - JOUR

T1 - Fabrication and characterization of a novel Ba2+-loaded sawdust biochar doped with iron oxide for the super-adsorption of SO42− from wastewater

AU - Khalid, Warda

AU - Cheng, Chin Kui

AU - Liu, Peng

AU - Tang, Jinping

AU - Liu, Xin

AU - Ali, Asmat

AU - Shahab, Asfandyar

AU - Wang, Xingjie

N1 - Funding Information: This work was supported by the National Natural Science Foundation of China [grant number 41877478 ], and the Fundamental Research Funds for the Central Universities ( China University of Geosciences (Wuhan) [grant number CUGGC06 ]). Publisher Copyright: © 2022

PY - 2022/9

Y1 - 2022/9

N2 - Biochar is a low-cost adsorbent used in the treatment of contaminated wastewater. We investigated the potential of an Fe-impregnated, Ba2+-loaded biochar (Fe-(Ba-BC)) for the removal of SO42− from aqueous solutions. The Ba2+-loaded biochar was synthesized from sawdust impregnated with iron oxide via pyrolysis at 600 °C. The porous structure of the Fe-(Ba-BC) was identified by scanning electron microscopy before sulfate was adsorbed onto the adsorbent. Functional groups were determined by energy-dispersive spectrophotometry and Raman spectrometry. The Fe-(Ba-BC) Raman peaks before the experiment were higher than after, suggesting the precipitation of BaSO4. The presence of BaCl2 on the surface of the biochar was confirmed by X-ray diffraction. Batch sorption results showed that Fe-(Ba-BC) strongly adsorbed aqueous SO42− with a removal efficacy of 96.7% under the optimum conditions of 0.25 M BaCl2, a contact time of 480 min, a pH of 9 and an adsorbent dose of 2 g. The optimum condition for removal and reaction rate kinetics analysis indicated that adsorption curve fitted well with PSO, k2 0.00015 confirmed the removal of SO42− via chemisorption. Thus, Fe-(Ba-BC) was found to be a favorable adsorbent for removing SO42−.

AB - Biochar is a low-cost adsorbent used in the treatment of contaminated wastewater. We investigated the potential of an Fe-impregnated, Ba2+-loaded biochar (Fe-(Ba-BC)) for the removal of SO42− from aqueous solutions. The Ba2+-loaded biochar was synthesized from sawdust impregnated with iron oxide via pyrolysis at 600 °C. The porous structure of the Fe-(Ba-BC) was identified by scanning electron microscopy before sulfate was adsorbed onto the adsorbent. Functional groups were determined by energy-dispersive spectrophotometry and Raman spectrometry. The Fe-(Ba-BC) Raman peaks before the experiment were higher than after, suggesting the precipitation of BaSO4. The presence of BaCl2 on the surface of the biochar was confirmed by X-ray diffraction. Batch sorption results showed that Fe-(Ba-BC) strongly adsorbed aqueous SO42− with a removal efficacy of 96.7% under the optimum conditions of 0.25 M BaCl2, a contact time of 480 min, a pH of 9 and an adsorbent dose of 2 g. The optimum condition for removal and reaction rate kinetics analysis indicated that adsorption curve fitted well with PSO, k2 0.00015 confirmed the removal of SO42− via chemisorption. Thus, Fe-(Ba-BC) was found to be a favorable adsorbent for removing SO42−.

KW - Activated biochar

KW - Adsorption kinetics

KW - Chemisorption

KW - Sulfate removal

KW - Wastewater treatment

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