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Preparation of MnO2 modified winter melon-derived biochar for enhanced adsorption of U(VI) from aqueous solution

  • Qing Zhou , Yanjun Du EMAIL logo , Zihao Feng , Qi Ren , Yang Wang , Xiaoyong Chen , Yang Li and Yun Wang ORCID logo EMAIL logo
Published/Copyright: July 8, 2024
Radiochimica Acta
From the journal Radiochimica Acta Volume 112 Issue 11

Abstract

This work synthesized MnO2 modified winter melon-derived biochar (MnO2@WBC) using potassium permanganate oxidation/hydrothermal method for uranium(VI) removal. The factors influencing uranium(VI) adsorption by MnO2@WBC, including pH, adsorbent dosage, time, temperature, and initial U(VI) concentration were explored. The material’s performance was characterized, and the underlying mechanism of U(VI) removal was analyzed using various techniques. The characterization results indicated that the MnO2@WBC exhibited excellent dispersibility, suggesting that MnO2 effectively prevented WBC aggregation and enhanced the reactive surface area, and providing more active sites that can effectively promote the complexation and adsorption of U(VI). The process suggested a dominant role for chemical adsorption. The Freundlich isotherm model demonstrated a high degree of alignment with the observed adsorption behavior, indicating a predominantly multilayer adsorption process. Thermodynamic studies indicated that adsorption was a spontaneous endothermic process. The XPS analysis demonstrated that the adsorption process was primarily due to the formation of stable complexes with C–O, Mn–O–H and C=O. The results demonstrated that MnO2@WBC effectively removed U(VI), achieving a maximum adsorption capacity of 240.86 mg g−1 at a pH of 5.0. These findings provided a theoretical basis for the treatment of wastewater contaminated with U(VI).

Keywords: winter melon; MnO2 nanoparticles; biochar; adsorption; uranium(VI)
Corresponding authors: Yanjun Du and Yun Wang, School of Nuclear Science and Engineering, East China University of Technology, Nanchang 330013, Jiangxi, China, E-mail: (Y. Du), (Y. Wang)

Funding source: National Natural Science Foundation of China

Award Identifier / Grant number: 22366003

Funding source: Open Project Foundation of Stake key Laboratory of Nuclear Resources and Environment

Award Identifier / Grant number: 2022NRE30

Funding source: Jiangxi Provincial Natural Science Foundation

Award Identifier / Grant number: 20224BAB203005

Award Identifier / Grant number: 20232BAB213032

  1. Research ethics: Not applicable.

  2. Author contributions: The authors have accepted responsibility for the entire content of this manuscript and approved its submission.

  3. Competing interests: The authors state no conflict of interest.

  4. Research funding: This work was financially supported by the National Natural Science Foundation of China (22366003), Open Project Foundation of Stake key Laboratory of Nuclear Resources and Environment (2022NRE30), and Jiangxi Provincial Natural Science Foundation (20224BAB203005, 20232BAB213032).

  5. Data availability: The raw data can be obtained on request from the corresponding author.

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Received: 2024-04-28
Accepted: 2024-06-24
Published Online: 2024-07-08
Published in Print: 2024-11-26

© 2024 Walter de Gruyter GmbH, Berlin/Boston

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https://doi.org/10.1515/ract-2024-0301
Keywords for this article
winter melon; MnO2 nanoparticles; biochar; adsorption; uranium(VI)

Articles in the same Issue

  1. Frontmatter
  2. Original Papers
  3. Independent isomeric yield ratios of fission products in the epi-cadmium neutron-induced fission of 245Cm
  4. Preparation of MnO2 modified winter melon-derived biochar for enhanced adsorption of U(VI) from aqueous solution
  5. Separation studies of 60Co (II) and 134Cs (I) radionuclides from aqueous solution using starch-grafted citric acid-acrylamide/magnesia hydrogel
  6. Study on the adsorption performance of zeolite imidazole frameworks materials for Co(II) and Mn(II) in solution
  7. Synthesis, in silico and biodistribution studies of a novel 47Sc-radiolabeled α-amino acid ester derivative attached to pyrazine and tetrazole rings for tumor targeted radiotherapy
  8. [113mIn]In-PSMA: high potential agent for SPECT imaging of prostate cancer
  9. Physicochemical model of uranium hexafluoride (UF6) radiolysis under action of alpha particles
  10. Identification and time evolution of thionyl chloride (SOCl2) radiolysis products
  11. Measurement of gross alpha radioactivity levels and estimation of annual effective dose in hazelnut kernels
  12. Characterization of ferrous-xylenol orange-polyvinyl alcohol gel for gamma dosimetry using spectroscopy
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