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Characterization of Montmorillonite–Biochar Composite and Its Application in the Removal of Atrazine in Aqueous Solution and Soil

Abstract

Atrazine is a widely used triazine herbicide, which poses a serious threat to human health and aquatic ecosystem. A montmorillonite–biochar composite (MMT/BC) was prepared for atrazine remediation. Biochar samples were characterized by using scanning electron microscope (SEM), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), and X-ray photoelectron spectrometer (XPS). Structural and morphological analysis of raw biochar (BC) and MMT/BC showed that MMT particles have been successfully coated on the surface of biochar. Sorption experiments in aqueous solution indicated that the MMT/BC has higher removal capacity of atrazine compared to BC (about 3.2 times). The sorption of atrazine on the MMT/BC was primarily controlled by both physisorption and chemisorption mechanisms. The amendment of MMT/BC increased the sorption capacity of soils and delayed the degradation of atrazine. Findings from this work indicate that the MMT/BC composite can effectively improve the sorption capacity of atrazine in aquatic environment and farmland soil and reduce the environmental risk.

Category

Academic article

Client

  • Research Council of Norway (RCN) / 287431

Language

English

Author(s)

  • Pingping Wang
  • Marianne Stenrød
  • Liang Wang
  • Shankui Yuan
  • Liangang Mao
  • Lizhen Zhu
  • Lan Zhang
  • Yanning Zhang
  • Hongyun Jiang
  • Yongquan Zheng
  • Xingang Liu

Affiliation

  • Chinese Academy of Agricultural Sciences
  • Norwegian Institute of Bioeconomy Research
  • SINTEF Energy Research / Termisk energi
  • Unknown

Year

2022

Published in

Frontiers in Environmental Science

ISSN

2296-665X

Publisher

Frontiers Media S.A.

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