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Biosorption of Cr(VI) using coconut fibers from agro-industrial waste magnetized using magnetite nanoparticles.
Carvalho Costa, Antonio Wilson Macedo; Guerhardt, Flavio; Ribeiro Júnior, Silvestre Eduardo Rocha; Cânovas, Geovana; Vanale, Rosangela Maria; de Freitas Coelho, Diego; Ehrhardt, Daniela Diniz; Rosa, Jorge Marcos; BasileTambourgi, Elias; Curvelo Santana, José Carlos; de Souza, Roberto Rodrigues.
Afiliação
  • Carvalho Costa AWM; Department of Chemistry, Federal Institute de Education, Science and Technology of Sergipe (IFS), Aracaju, Brazil.
  • Guerhardt F; Department of Chemical Engineering, Federal University of Sergipe (UFS), São Cristóvão, Brazil.
  • Ribeiro Júnior SER; Nine July University, Industrial Engineering Postgraduate Program, São Paulo, Brazil.
  • Cânovas G; Technologic Park of Sorocaba, Sorocaba, Brazil.
  • Vanale RM; Nine July University, Industrial Engineering Postgraduate Program, São Paulo, Brazil.
  • de Freitas Coelho D; Technologic Park of Sorocaba, Sorocaba, Brazil.
  • Ehrhardt DD; Technologic Park of Sorocaba, Sorocaba, Brazil.
  • Rosa JM; Nine July University, Industrial Engineering Postgraduate Program, São Paulo, Brazil.
  • BasileTambourgi E; School of Chemical Engineering, State University of Campinas (UNICAMP), Campinas, Brazil.
  • Curvelo Santana JC; School of Chemical Engineering, State University of Campinas (UNICAMP), Campinas, Brazil.
  • de Souza RR; School of Chemical Engineering, State University of Campinas (UNICAMP), Campinas, Brazil.
Environ Technol ; 42(23): 3595-3606, 2021 Sep.
Article em En | MEDLINE | ID: mdl-32266861
Herein, the biosorption of Cr(VI) by magnetized coconut fibres obtained from agricultural waste has been described. Magnetization was achieved by incorporating magnetite nanoparticles into the fibres by a coprecipitation reaction in alkaline media. The biosorption capacity of the fibres was evaluated by two series of experiments. In the first series, 500 mg L-1 of the biosorbent was added to a 50 mg L-1 K2Cr2O7 solution at 28 °C and stirred at 200 rpm and the pH was varied from 1 to 13 to determine the optimum pH value. The second series of experiments evaluated the sorption capacity of the fibres at the optimum pH, under the same agitation speed and temperature but with an adsorbate concentration of 100 mg L-1. The biosorbents were characterized using Fourier transform-infrared spectroscopy, inductively coupled plasma-atomic emission spectroscopy, scanning electron microscopy, dispersive X-ray fluorescence, and X-ray powder diffraction. The biosorption experiments demonstrated that the magnetization process increased the biosorption capacity of the material. Optimum biosorption occurred at pH 2, and at optimal conditions, the best adsorptive efficiency exceeded 90%, reaching a biosorption capacity of 87.38 mg g-1 for the magnetized fibre and 23.87 mg g-1 for the natural fibre, with an equilibrium time of less than 20 min.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Poluentes Químicos da Água / Nanopartículas de Magnetita Idioma: En Revista: Environ Technol Assunto da revista: SAUDE AMBIENTAL / TOXICOLOGIA Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Brasil País de publicação: Reino Unido
Texto completo
Adicionar na Minha BVS
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Poluentes Químicos da Água / Nanopartículas de Magnetita Idioma: En Revista: Environ Technol Assunto da revista: SAUDE AMBIENTAL / TOXICOLOGIA Ano de publicação: 2021 Tipo de documento: Article País de afiliação: Brasil País de publicação: Reino Unido