an official journal of: published by:
Editor in Chief: RAFFAELLO COSSU


  • Xinwei Dong - School of Environment, Tsinghua University, China
  • Dongbei Yue - School of Environment, Tsinghua University, China

DOI 10.31025/2611-4135/2021.14060

Released under CC BY-NC-ND

Copyright: © 2021 CISA Publisher

Editorial History

  • Received: 13 Aug 2020
  • Revised: 06 Jan 2021
  • Accepted: 08 Jan 2021
  • Available online: 31 Jan 2021


Synthesized humus displays a high adsorption capacity for heavy metals in water due to an abundance of active functional groups and to a flexibility of modification resulting from the readily controllable synthesis process. Herein, a new method is proposed to prepare magnetic humus with high performance in the removal of Cr(VI) in water. The synthesized humus is produced through the abiotic humification technology with small molecular precursors including phenols, amino acids, and glucose. Nanoferroferric oxide (Fe3O4) plays an important role in the enhancement of the humus synthesis process. The high affinity of humus towards Fe3O4 anoparticles, enables growing of humus on the surface of Fe3O4 nanoparticles. The surface morphology of the manufactured magnetic humus suggests that this material has a core-shell structure. The magnetite nanoparticles in magnetic humus show the largest amount of humus (~33.37 w/w%) at pH 8. The high loading ability of humus results in a high removal efficiency of 99.95% in a 7.30 mg/L Cr(VI) solution involving 4 mg/mL magnetic humus. Therefore, the present method is feasible to construct a core-shell magnetic humus composite to achieve high removal of Cr(VI) in water.



Koesnarpadi, S., Santosa, S. J., Siswanta, D., & Rusdiarso, B. (2017). Humic Acid Coated Fe3O4 Nanoparticle for Phenol Sorption. Indonesian Journal of Chemistry, 17(2), 274-283.
DOI 10.22146/ijc.22545

Liu, J. F., Zhao, Z. S., & Jiang, G. B. (2008). Coating Fe3O4 magnetic nanoparticles with humic acid for high efficient removal of heavy metals in water. Environmental Science & Technology, 42(18), 6949-6954.
DOI 10.1021/es800924c

Liu, Y. G., Li, T. T., Zeng, G. M., Zheng, B. H., Xu, W. H., & Liu, S. B. (2016). Removal of Pb(I ) from aqueous solution by magnetic humic acid/chitosan composites. Journal of Central South University, 23(11), 2809-2817.
DOI 10.1007/s11771-016-3344-1

Peng, L., Qin, P. F., Lei, M., Zeng, Q. R., Song, H. J., Yang, J., Shao J., Liao B.H., Gu, J. D. (2012). Modifying Fe3O4 nanoparticles with humic acid for removal of Rhodamine B in water. Journal of Hazardous Materials, 209, 193-198.
DOI 10.1016/j.jhazmat.2012.01.011

Rashid, M., Sterbinsky, G. E., Pinilla, M. A. G., Cai, Y., & O'Shea, K. E. (2018). Kinetic and Mechanistic Evaluation of Inorganic Arsenic Species Adsorption onto Humic Acid Grafted Magnetite Nanoparticles. Journal of Physical Chemistry C, 122(25), 13540-13547.
DOI 10.1021/acs.jpcc.7b12438

Singhal, P., Jha, S. K., Pandey, S. P., & Neogy, S. (2017). Rapid extraction of uranium from sea water using Fe3O4 and humic acid coated Fe3O4 nanoparticles. Journal of Hazardous Materials, 335, 152-161.
DOI 10.1016/j.jhazmat.2017.04.043

Singhal, P., Pulhani, V., Ali, S. M., & Ningthoujam, R. S. (2019). Sorption of different metal ions on magnetic nanoparticles and their effect on nanoparticles settlement. Environmental Nanotechnology, Monitoring & Management, 11, 100202.
DOI 10.1016/j.enmm.2018.100202

Singhal, P., Vats, B. G., & Pulhani, V. (2020a). Magnetic nanoparticles for the recovery of uranium from sea water: Challenges involved from research to development. Journal of Industrial and Engineering Chemistry, 90, 17-35.
DOI 10.1016/j.jiec.2020.07.035

Singhal, P., Vats, B. G., Yadav, A., & Pulhani, V. (2020b). Efficient extraction of uranium from environmental samples using phosphoramide functionalized magnetic nanoparticles: Understanding adsorption and binding mechanisms. Journal of Hazardous Materials, 384, 121353.
DOI 10.1016/j.jhazmat.2019.121353

Tang, Z., Zhao, X. L., Zhao, T. H., Wang, H., Wang, P. F., Wu, F. C., & Giesy, J. P. (2016). Magnetic Nanoparticles Interaction with Humic Acid: In the Presence of Surfactants. Environmental Science & Technology, 50(16), 8640-8648.
DOI 10.1021/acs.est.6b01749

Yang, S. T., Zong, P. F., Ren, X. M., Wang, Q., & Wang, X. K. (2012). Rapid and Highly Efficient Preconcentration of Eu(III) by Core-Shell Structured Fe3O4@Humic Acid Magnetic Nanoparticles. Acs Applied Materials & Interfaces, 4(12), 6890-6899.
DOI 10.1021/am3020372

Yang, T., & Hodson, M. E. (2018). The copper complexation ability of a synthetic humic-like acid formed by an abiotic humification process and the effect of experimental factors on its copper complexation ability. Environmental Science and Pollution Research, 25(16), 15873-15884.
DOI 10.1007/s11356-018-1836-2

Zhang, Y. C., Yue, D. B., Lu, X. F., Zhao, K. Y., & Ma, H. (2017). Role of ferric oxide in abiotic humification enhancement of organic matter. Journal of Material Cycles and Waste Management, 19(1), 585-591.
DOI 10.1007/s10163-015-0435-2

Zhang, Y. C., Yue, D. B., & Ma, H. (2015). Darkening mechanism and kinetics of humification process in catechol-Maillard system. Chemosphere, 130, 40-45

Zhang, Y. C., Yue, D. B., Wang, X., & Song, W. F. (2019). Mechanism of oxidation and catalysis of organic matter abiotic humification in the presence of MnO2. Journal of Environmental Sciences-China, 77, 167-173.
DOI 10.1016/j.jes.2018.07.002

Zou, J., Huang, J., Yue, D., & Zhang, H. (2020). Roles of oxygen and Mn (IV) oxide in abiotic formation of humic substances by oxidative polymerization of polyphenol and amino acid. Chemical Engineering Journal, 393, 124734.
DOI 10.1016/j.cej.2020.124734