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

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Ferreira, Francisco J. L.
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.

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Elsevier B.V.


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.



Cellulose, Aminosilane, Modification, Adsorption, Amitriptyline, Eosin yellow

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Carbohydrate Polymers. Oxford: Elsevier Sci Ltd, v. 225, 11 p., 2019.