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Benzene, toluene and o-xylene (BTX) removal from aqueous solutions through adsorptive processes

Hackbarth, Fabíola V. ; Vilar, Vítor J. P. ; De Souza, Geerlesson B. ; de Souza, Selene M. A. Guelli U. ; de Souza, Antônio Augusto U.

Adsorption : journal of the International Adsorption Society, 2014, Vol.20 (4), p.577-590 [Periódico revisado por pares]

Boston: Springer US

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  • Título:
    Benzene, toluene and o-xylene (BTX) removal from aqueous solutions through adsorptive processes
  • Autor: Hackbarth, Fabíola V. ; Vilar, Vítor J. P. ; De Souza, Geerlesson B. ; de Souza, Selene M. A. Guelli U. ; de Souza, Antônio Augusto U.
  • Assuntos: Adsorption ; Benzene ; Chemistry ; Chemistry and Materials Science ; Engineering Thermodynamics ; Heat and Mass Transfer ; Industrial Chemistry/Chemical Engineering ; Manganese ; Mathematical models ; Polymers ; Resins ; Sorption ; Surfaces and Interfaces ; Thin Films ; Toluene
  • É parte de: Adsorption : journal of the International Adsorption Society, 2014, Vol.20 (4), p.577-590
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
  • Descrição: In this study, the monocomponent adsorption of benzene, toluene and o -xylene (BTX) compounds, as model contaminants present in the petrochemical wastewaters, was investigated using three types of adsorbents: activated carbon (Carbon CD 500), a polymeric resin (MN-202) and a modified clay (Claytone-40). Langmuir and Freundlich models were able to fit well the equilibrium experimental data. The BTX adsorption capacity increased in the following order: Claytone-40 < CD 500 < MN-202. The maximum uptake capacity of MN-202, given by the Langmuir fitting parameter, for benzene, toluene and o -xylene was 0.8 ± 0.1, 0.70 ± 0.08 and 0.63 ± 0.06 mmol/g at 26 °C. Desorption kinetics for polymeric resin with 50 % methanol solution were fast being able to reuse the resin in consecutive adsorption/desorption cycles without loss of sorption capacity. The adsorptive behaviour at batch system was modelled using a mass transfer kinetic model, considering that the sorption rate is controlled by a linear driving force model, which successfully predicts benzene, toluene and o -xylene concentration profiles, with homogeneous diffusivity coefficients, D h , between 3.8 × 10 −10 and 3.6 × 10 −9  cm 2 /s. In general, benzene diffuses faster than toluene and o -xylene, which is in agreement with molecular diffusivity in water.
  • Editor: Boston: Springer US
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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