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Caffeine Adsorption onto Bentonite Clay in Suspension and Immobilized
Lenzi, Giane Gonçalves; Fuziki, Maria Eduarda Kounaris; Fidelis, Michel Zampieri; Fávaro, Yuri Barros; Ribeiro, Mauricio Aparecido; Chaves, Eduardo Sidinei; Lenzi, Ervin Kaminski.
  • Lenzi, Giane Gonçalves; Federal University of Technology. Department of Chemical Engineering. Ponta Grossa. BR
  • Fuziki, Maria Eduarda Kounaris; Federal University of Technology. Department of Chemical Engineering. Ponta Grossa. BR
  • Fidelis, Michel Zampieri; Federal University of Technology. Department of Chemical Engineering. Ponta Grossa. BR
  • Fávaro, Yuri Barros; Federal University of Technology. Department of Chemical Engineering. Ponta Grossa. BR
  • Ribeiro, Mauricio Aparecido; Federal University of Technology. Department of Chemical Engineering. Ponta Grossa. BR
  • Chaves, Eduardo Sidinei; Federal University of Santa Catarina. Department of Chemistry. Florianópolis. BR
  • Lenzi, Ervin Kaminski; State University of Ponta Grossa. Department of Physics. Ponta Grossa. BR
Braz. arch. biol. technol ; 63: e20180637, 2020. tab, graf
Article in English | LILACS | ID: biblio-1132189
ABSTRACT
Abstract This study describes the use of bentonite in suspension for the caffeine adsorption (pollutant of emerging concern) by taking different conditions of the pH, adsorbent mass, adsorbent calcination temperature and interferents into account. The results were compared with those obtained using bentonite immobilized in alginate beads. The acid medium has a greater efficiency for the caffeine adsorption and the adsorbent calcination temperature exerts, due to structural changes. Caffeine removal higher than 90% was obtained at optimized conditions. The Langmuir model indicated a better fit of the data and the adsorption capacity of caffeine onto bentonite. The bentonite immobilized led to a slower adsorption process in relation to the suspended.
Subject(s)


Full text: Available Index: LILACS (Americas) Main subject: Water Pollutants, Chemical / Bentonite / Caffeine Language: English Journal: Braz. arch. biol. technol Journal subject: Biology Year: 2020 Type: Article Affiliation country: Brazil Institution/Affiliation country: Federal University of Santa Catarina/BR / Federal University of Technology/BR / State University of Ponta Grossa/BR

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Full text: Available Index: LILACS (Americas) Main subject: Water Pollutants, Chemical / Bentonite / Caffeine Language: English Journal: Braz. arch. biol. technol Journal subject: Biology Year: 2020 Type: Article Affiliation country: Brazil Institution/Affiliation country: Federal University of Santa Catarina/BR / Federal University of Technology/BR / State University of Ponta Grossa/BR