Refuse derived fuel char as a low-cost adsorbent for the cationic dye methylene blue

• C. Nobre ^[1] ; M. Gonçalves ^[1] ; C. Vilarinho ^[2]
  1. [1] Universidade Nova de Lisboa

     Universidade Nova de Lisboa

     Socorro, Portugal

     
  2. [2] Universidade do Minho

     Universidade do Minho

     Braga (São José de São Lázaro), Portugal

     
• Localización: Wastes: solutions, treatments and opportunities III / Cândida Vilarinho (dir.), Fernando Castro (dir.), Margarida Gonçalves Neto (dir.), Ana Luísa Fernando (dir.), 2020, ISBN 9780367257774, págs. 549-554
• Idioma: inglés
• Texto completo no disponible (Saber más ...)
• Resumen

  • This work addresses the application of Refuse Derived Fuel (RDF) char as a low-cost adsorbent for methylene blue (MB) in batch mode, as an approach to remediate pigment contaminated effluents and a model for the adsorption of cationic analytes. The RDF char was tested without pre-treatment and after a cold alkali treatment to enhance adsorption. The adsorbents were characterized for proximate and ultimate composition, pHpzc and N2 adsorption/desorption behavior. Operation parameters such as pH, adsorbent dose, contact time, dye concentration and temperature were varied. Kinetic studies revealed that adsorption of methylene blue in the RDF chars followed a pseudo-second-order kinetic model. Adsorption isotherms showed differences in the possible adsorption mechanisms as a result of char activation. This work highlighted that RDF chars that are not suitable for energy conversion may be valorized as a low-cost adsorbents.