Removal of tetracycline by NaOH-activated carbon produced from macadamia nut shells: Kinetic and equilibrium studies

Alessandro C. Martins, Osvaldo Pezoti, André L. Cazetta, Karen C. Bedin, Diego A S Yamazaki, Gisele F G Bandoch, Teddy Asefa, Jesuí V. Visentainer, Vitor C. Almeida

Research output: Contribution to journalArticle

175 Citations (Scopus)

Abstract

A NaOH-activated carbon was prepared from macadamia nut shell using the impregnation ratio of 3:1 (NaOH:char) (wt:wt). The obtained material (ACM) was characterized by several techniques and methodologies such as, N2 adsorption-desorption isotherms, SEM, FT-IR, Boehm titration, and pHpzc. The results demonstrated that the ACM is composed mainly of micropores (78.2%), presenting BET surface area of 1524m2g-1. Through the SEM and FT-IR analysis it could be observed that significant changes occurred on the material surface after the activation procedure. According to Boehm titration, the ACM has on its surface a majority of basic groups which is in agreement with the obtained pHpzc value of 8.74. The ACM was applied for tetracycline (TC) removal in order to assess its potential as an adsorbent. Thus, adsorption studies were carried out and several kinetic and isotherm models were employed. The isotherm model which best fitted to experimental data was Temkin, while the best fitted kinetic model was Elovich. ACM showed maximum monolayer adsorption capacity (Qm) of 455.33mgg-1. The intraparticle diffusion and film diffusion mechanisms were studied by the equations of Weber & Morris and Boyd, respectively. According to the results, the limiting step of the adsorption of TC onto ACM is influenced by intraparticle diffusion and by film diffusion.

Original languageEnglish
Pages (from-to)291-299
Number of pages9
JournalChemical Engineering Journal
Volume260
DOIs
Publication statusPublished - Jan 5 2015

Fingerprint

nut
Tetracycline
Activated carbon
activated carbon
shell
adsorption
Isotherms
Adsorption
kinetics
isotherm
Kinetics
Titration
scanning electron microscopy
Scanning electron microscopy
Impregnation
Adsorbents
Monolayers
Desorption
desorption
surface area

Keywords

  • Activated carbon
  • Adsorption
  • Macadamia nut shell
  • Tetracycline

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)
  • Industrial and Manufacturing Engineering
  • Environmental Chemistry

Cite this

Martins, A. C., Pezoti, O., Cazetta, A. L., Bedin, K. C., Yamazaki, D. A. S., Bandoch, G. F. G., ... Almeida, V. C. (2015). Removal of tetracycline by NaOH-activated carbon produced from macadamia nut shells: Kinetic and equilibrium studies. Chemical Engineering Journal, 260, 291-299. https://doi.org/10.1016/j.cej.2014.09.017

Removal of tetracycline by NaOH-activated carbon produced from macadamia nut shells : Kinetic and equilibrium studies. / Martins, Alessandro C.; Pezoti, Osvaldo; Cazetta, André L.; Bedin, Karen C.; Yamazaki, Diego A S; Bandoch, Gisele F G; Asefa, Teddy; Visentainer, Jesuí V.; Almeida, Vitor C.

In: Chemical Engineering Journal, Vol. 260, 05.01.2015, p. 291-299.

Research output: Contribution to journalArticle

Martins, AC, Pezoti, O, Cazetta, AL, Bedin, KC, Yamazaki, DAS, Bandoch, GFG, Asefa, T, Visentainer, JV & Almeida, VC 2015, 'Removal of tetracycline by NaOH-activated carbon produced from macadamia nut shells: Kinetic and equilibrium studies', Chemical Engineering Journal, vol. 260, pp. 291-299. https://doi.org/10.1016/j.cej.2014.09.017
Martins, Alessandro C. ; Pezoti, Osvaldo ; Cazetta, André L. ; Bedin, Karen C. ; Yamazaki, Diego A S ; Bandoch, Gisele F G ; Asefa, Teddy ; Visentainer, Jesuí V. ; Almeida, Vitor C. / Removal of tetracycline by NaOH-activated carbon produced from macadamia nut shells : Kinetic and equilibrium studies. In: Chemical Engineering Journal. 2015 ; Vol. 260. pp. 291-299.
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