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Adsorption of Pb2+ by MnO2-loaded Magnetic Bagasse Carbon |
Received:October 26, 2021 Revised:November 02, 2021 |
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DOI:doi:10.3969/j.issn.1007-7545.2022.02.015 |
KeyWord:magnetic sugar cane bagasse charcoal; Mn binary oxide; loading; adsorption; Pb2+ |
Author | Institution |
QIN Ling |
广西大学化学化工学院 |
GUAN Yu-ting |
广西大学化学化工学院 |
JI Gang |
广西大学化学化工学院 |
GU Po-wei |
广西大学化学化工学院 |
SU Hai-feng |
广西大学化学化工学院 |
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Abstract: |
MnO2-loaded magnetic bagasse carbon (MnO2@Fe3O4@SCBC) was fabricated via precipitation calcination method and hydrothermal method. The adsorbent was characterized by XRD and FT-IR to confirm that MnO2 is successfully loaded on Fe3O4@SCBC. Effects of adsorbent quality and initial pH value of solution on adsorption of Pb2+ by MnO2@ Fe3O4@SCBC were investigated. Adsorption dynamics and thermodynamic behaviors of Fe3O4@SCBC and MnO2@Fe3O4@SCBC for Pb2+ were compared. The results show that under the experimental conditions, MnO2@Fe3O4@SCBC displays excellent performance in adsorption capacity towards Pb2+, and the adsorption process is described well by the quasi second-order kinetic equation and Langmuir isothermal adsorption model. The maximum adsorption capacity of MnO2@Fe3O4@SCBC towards Pb2+ is 241.33mg/g under the conditions including adsorption time of 10 h,initial pH value of solution of 5, dosage of adsorbent of 20 mg, and initial concentration of Pb2+ of 100 mg/L. After ten consecutive adsorption-desorption experiments, the adsorbent remains high activity and stable adsorption capacity. |
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