Synthesis, characterization and application of new adsorbent composites based on sol-gel/chitosan for the removal of soluble substance in water
Jonatan Rafael de Mello,
Thaís Strieder Machado,
Larissa Crestani,
Ingridy Alessandretti,
Giovana Marchezi,
Flávia Melara,
Marcelo Luis Mignoni,
Jeferson Steffanello Piccin
Affiliations
Jonatan Rafael de Mello
Postgraduate in Food Science and Technology, Faculty of Agronomy and Veterinary Medicine, University of Passo Fundo, BR 285, km 171, Passo Fundo, RS, Brazil
Thaís Strieder Machado
Postgraduate in Civil and Environmental Engineering, Faculty of Engineering and Architecture, University of Passo Fundo, BR 285, km 171, Passo Fundo, RS, Brazil; Corresponding author.
Larissa Crestani
Chemical Engineering Course, Faculty of Engineering and Architecture, University of Passo Fundo, BR 285, km 171, Passo Fundo, RS, Brazil
Ingridy Alessandretti
Chemical Engineering Course, Faculty of Engineering and Architecture, University of Passo Fundo, BR 285, km 171, Passo Fundo, RS, Brazil
Giovana Marchezi
Chemical Engineering Course, Faculty of Engineering and Architecture, University of Passo Fundo, BR 285, km 171, Passo Fundo, RS, Brazil
Flávia Melara
Postgraduate in Civil and Environmental Engineering, Faculty of Engineering and Architecture, University of Passo Fundo, BR 285, km 171, Passo Fundo, RS, Brazil
Marcelo Luis Mignoni
Department of Food and Chemical Engineering, University of Regional Integrated of Alto Uruguay and the Missions, Avenue Sete de Setembro, 1621, Erechim, RS, Brazil
Jeferson Steffanello Piccin
Postgraduate in Food Science and Technology, Faculty of Agronomy and Veterinary Medicine, University of Passo Fundo, BR 285, km 171, Passo Fundo, RS, Brazil; Postgraduate in Civil and Environmental Engineering, Faculty of Engineering and Architecture, University of Passo Fundo, BR 285, km 171, Passo Fundo, RS, Brazil; Chemical Engineering Course, Faculty of Engineering and Architecture, University of Passo Fundo, BR 285, km 171, Passo Fundo, RS, Brazil
In this work, new adsorbent composites from the silica precursor tetraethyl orthosilicate (TEOS) and chitosan have been successfully synthesized, denominated 20%Chi, 30%Chi and 40%Chi. The composites presented enhanced chemical and physical characteristics, with emphasis on the high surface areas between 374.94 m2/g to 886.31 m2/g. The application of the composites in the model system (TY - Tartrazine yellow dye), presented adsorption capacities dependent on the amount of chitosan in the composite (40%Chi > 30%Chi > 20%Chi). However, from the experimental data of the constituent materials, 30%Chi provided the greatest increase in the adsorption capacity in the monolayer, with values of 36%. This demonstrates that the amount of chitosan in the compound alters the arrangement of adsorption sites. The 30%Chi composite presented life cycle superior to 10 reuse cycles.
