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| Adsorption of Pb2+ by MnO2-loaded Magnetic Bagasse Carbon |
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Received:October 26, 2021
Revised:November 02, 2021
Accepted:November 08, 2021
Published Online:January 18, 2022
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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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