New alternative for adsorption of 2,4-dichlorophenoxyacetic acid herbicide (2,4-D)

Authors

  • Michelle Ferreira da Silva Rimoli Universidade Federal de Mato Grosso
  • Roberta Martins Nogueira Universidade Federal de Mato Grosso https://orcid.org/0000-0002-7197-4457
  • Pryscila Machado de Castro Universidade Federal de Mato Grosso
  • Aloir Antônio Merlo Universidade Federal do Rio Grande do Sul https://orcid.org/0000-0002-8071-5297
  • Adilson Sinhorin Universidade Federal de Mato Grosso
  • Jacqueline Kerkhoff Universidade Federal de Mato Grosso https://orcid.org/0000-0001-5597-1822
  • Stela Regina Ferrarini Universidade Federal de Mato Grosso
  • Evaldo Martins Pires Universidade Federal de Mato Grosso https://orcid.org/0000-0003-0647-084X

DOI:

https://doi.org/10.14393/BJ-v39n0a2023-64440

Keywords:

Activated charcoal, Brazil nuts, Herbicide, Micropores.

Abstract

The adsorptive capacity of charcoal from the husk of the brazil nut fruit, called “ouriço” (the hard ball with nuts inside) for the herbicide dichlorophenoxyacetic acid (2,4-D) was evaluated. Activated carbons were produced from the brazil nut in a tubular oven at 800 °C and activated with CO2 or water steam. The specific surface area was determined by the Brunauer, Emmett and Teller (BET) method, demonstrating the mean density of micropores. Analysis of N2 adsorption/desorption isotherms was undertaken and the morphology of activated carbons was visualized by Scanning Microscopy (SEM). The activated carbons were successfully obtained and had a specific surface area of 395 m2.g-1 and 401 m2.g-1 after activation with either CO2 or water steam, respectively. The highest pore mean density occurred with a diameter of 1.17 nm for carbons activated in both atmospheres. The graph of the adsorption/desorption isotherms of N2 showed Type I isotherms, regardless of the activation atmosphere. The SEM analysis showed that, for both activation atmospheres, pore formation occurred in the shape of uniform honeycomb craters. Adsorption kinetics followed the pseudo-second order model, indicating chemisorption. Regardless of the activation atmosphere, the activated carbon from the brazil nut “ouriço”, was highly efficient for 2,4-D adsorption.

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References

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Published

2023-08-18

How to Cite

RIMOLI, M.F. da S., NOGUEIRA, R.M., CASTRO, P.M. de, MERLO, A.A., SINHORIN, A., KERKHOFF, J., FERRARINI, S.R. and PIRES, E.M., 2023. New alternative for adsorption of 2,4-dichlorophenoxyacetic acid herbicide (2,4-D). Bioscience Journal [online], vol. 39, pp. e39091. [Accessed21 June 2024]. DOI 10.14393/BJ-v39n0a2023-64440. Available from: https://seer.ufu.br/index.php/biosciencejournal/article/view/64440.

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Section

Agricultural Sciences