Production of low-cost adsorbents by torrefaction of biomass wastes from Arundo donax L. and Phoenix canariensis

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Abstract

The valorization of torrefied biomass wastes of Arundo donax L. and Phoenix canariensis as adsorbents of the methylene blue dye (MB) was investigated. Removal percentages between ca. 90% and 99% were attained for initial MB concentrations up to 200 mg/L, with equilibrium being reached within the first 30 min. Adsorption kinetics followed the pseudo-second order model and the equilibrium data were best described by the Langmuir isotherm model, with adsorption capacities following the order: torrefied palm leaf sheaths (92.68 mg/g) > torrefied Arundo donax L. (89.77 mg/g) > torrefied palm trunk (59.92 mg/g). All adsorbents evidenced other important features, such as selectivity towards a given dye from a mixture and also allowed recovery of adsorbed dye, as opposed to a commercial activated carbon (AC). Results suggest that these abundant wastes have potential as low-cost adsorbents for dye removal from industrial wastewaters, a more sustainable option than the usual landfilling.

Original languageEnglish
Title of host publicationECOS 2018 - Proceedings of the 31st International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems
PublisherUMDGEO - Department of Geography of University of Minho
ISBN (Electronic)9789729959646
Publication statusPublished - 2018
Event31st International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, ECOS 2018 - Guimaraes, Portugal
Duration: 17 Jun 201821 Jun 2018

Conference

Conference31st International Conference on Efficiency, Cost, Optimization, Simulation and Environmental Impact of Energy Systems, ECOS 2018
CountryPortugal
CityGuimaraes
Period17/06/1821/06/18

Keywords

  • Arundo donax L
  • Desorption
  • Dye adsorption
  • Phoenix canariensis
  • Selectivity
  • Torrefaction

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