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Computational and experimental assessment of efficient dye adsorption method from aqueous effluents by halloysite and palygorskite clay minerals.
Câmara, Anne B F; Silva, Mariana R L; de Longe, Clenildo; Moura, Heloise O M A; Silva, Sérgio R B; de Souza, Miguel A F; Rodríguez-Castellón, Enrique; de Carvalho, Luciene S.
Afiliação
  • Câmara ABF; Institute of Chemistry, Federal University of Rio Grande Do Norte, Energetic Technologies Research Group, Natal, 59078-900, Brazil.
  • Silva MRL; Institute of Chemistry, Federal University of Rio Grande Do Norte, Energetic Technologies Research Group, Natal, 59078-900, Brazil.
  • de Longe C; Institute of Chemistry, Federal University of Rio Grande Do Norte, Energetic Technologies Research Group, Natal, 59078-900, Brazil.
  • Moura HOMA; Institute of Chemistry, Federal University of Rio Grande Do Norte, Energetic Technologies Research Group, Natal, 59078-900, Brazil.
  • Silva SRB; Institute of Chemistry, Federal University of Rio Grande Do Norte, Energetic Technologies Research Group, Natal, 59078-900, Brazil.
  • de Souza MAF; Institute of Chemistry, Federal University of Rio Grande Do Norte, Energetic Technologies Research Group, Natal, 59078-900, Brazil.
  • Rodríguez-Castellón E; Dpto. de Química Inorgánica, Cristalografía y Mineralogía, Facultad de Ciencias, Universidad de Málaga, 29071, Málaga, Spain.
  • de Carvalho LS; Institute of Chemistry, Federal University of Rio Grande Do Norte, Energetic Technologies Research Group, Natal, 59078-900, Brazil. luciene.santos@ufrn.br.
Environ Sci Pollut Res Int ; 31(41): 53671-53690, 2024 Sep.
Article em En | MEDLINE | ID: mdl-38158527
ABSTRACT
The removal of dyes from effluents of textile industries represents a technological challenge, due to their significant environmental impact. The application of halloysite (Hal) and palygorskite (Pal) clay minerals as adsorbents for the removal of Congo red (CR) and methylene blue (MB) was evaluated in this work. The materials were applied both in natural and acid-treated forms, and characterized by XRD, XPS, SEM-EDS, FTIR, and N2 adsorption-desorption isotherm techniques to identify their properties and main active sites. The adsorbents showed potential to remove CR (> 98%) and MB (> 85%) within 180 min, using 0.3 g adsorbent and initial dye concentration of 250 mg L-1. Semi-empirical quantum mechanical calculations (SQM) confirmed the interaction mechanism between dyes and the adsorbents via chemisorption (- 69.0 kcal mol-1 < Eads < - 28.8 kcal mol-1), which was further observed experimentally due to the high fit of adsorption data to pseudo-second order kinetic model (R2 > 0.99) and Langmuir isotherm (R2 > 0.98). The use of Pal and Hal to remove dyes was proven to be economically and environmentally viable for industrial application.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Poluentes Químicos da Água / Argila / Compostos de Silício / Corantes Idioma: En Revista: Environ Sci Pollut Res Int Assunto da revista: SAUDE AMBIENTAL / TOXICOLOGIA Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Brasil País de publicação: Alemanha
Texto completo
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Poluentes Químicos da Água / Argila / Compostos de Silício / Corantes Idioma: En Revista: Environ Sci Pollut Res Int Assunto da revista: SAUDE AMBIENTAL / TOXICOLOGIA Ano de publicação: 2024 Tipo de documento: Article País de afiliação: Brasil País de publicação: Alemanha