Structural modification of regenerated fuller earth and its application in the adsorption of anionic and cationic dyes

Fuller's earth is an inorganic material used in the electric industry for dielectric oil regeneration. After decontamination treatment, Fuller's earth is regenerated and reused. In this study, the removal capacity of regenerated Fuller for the treatment of water contaminated with dyes of different nature and in turn, how this capacity can be increased by structural modification of the material was evaluated. Thus, the regenerated Fuller earth without any modification reached 99% removal of methylene blue. However, for treatment of effluents contaminated with red 40, acid and thermal modification of material was required to obtain adsorption greater than 94% of the dye. In conclusion, regenerated Fuller earth adsorbent is suitable for treating effluents contaminated with cationic coloring materials. However, removal of anionic dyes is not efficient, the structural modification of the material to be necessary to enhance the removal of these type colorants.

• Autores: Beltran-Pérez, Oscar Dario; Hormaza-Anaguano, Angelina; Zuluaga-Diaz, Benjamin; Cardona Gallo, Santiago Alonso
• Tipo de recurso: Article of journal
• Fecha de publicación: 2015
• Institución: Universidad Nacional de Colombia
• Repositorio: Universidad Nacional de Colombia
• Idioma: spa
• OAI Identifier: oai:repositorio.unal.edu.co:unal/60777
• Acceso en línea: https://repositorio.unal.edu.co/handle/unal/60777; http://bdigital.unal.edu.co/59109/
• Palabra clave: 62 Ingeniería y operaciones afines / Engineering; Regenerated Fuller earth; methylene blue; red 40; acid modification; thermal modification; cationic and anionic dyes.
• Rights: openAccess
• License: Atribución-NoComercial 4.0 Internacional