Understanding kinetics and thermodynamics of the interactions between amitriptyline or eosin yellow and aminosilane-modified cellulose

• Autor(a) principal: Ferreira, Francisco J. L.
• Data de Publicação: 2019
• Outros Autores: Silva, Lucinaldo S., Silva, Mateus S. da, Osajima, Josy A., Meneguin, Andreia B., Santagneli, Silvia H. [UNESP], Barud, Hernane S., Bezerra, Roosevelt D. S., Silva-Filho, Edson C.
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UNESP
• Texto Completo: http://dx.doi.org/10.1016/j.carbpol.2019.115246; http://hdl.handle.net/11449/184711
• topic: Cellulose; Aminosilane; Modification; Adsorption; Amitriptyline; Eosin yellow

A new adsorbent matrix (Cel-SiN) for the adsorption of the dye eosin yellow (EY) and the drug amitriptyline (AMI) from aqueous media has been synthesized. The Cel-SiN matrix was obtained via chemical modification of cellulose with (3-aminopropyl)trimethoxysilane. Successful modification was confirmed using Fourier transform infrared (FTIR) and C-13 and Si-29 solid state nuclear magnetic resonance (SSNMR) spectroscopies, thermal analysis (TG/DTG), X-ray diffraction (XRD), and elemental analysis. The effects of pH, contact time, concentration, and temperature were evaluated in batch adsorption tests. Cel-SiN efficiently adsorbed AMI and EY in aqueous media, with maximum adsorption capacities of 92.28 +/- 1.34 mg g(-1) for AMI (pH = 7, time = 240 min, and temperature = 318 K) and 61.0 +/- 0.36 mg g(-1) for EY (pH = 5, time = 80 min, and temperature = 298 K). The adsorption process occurs mainly via hydrogen bonding interactions for AMI and electrostatic interactions for EY.