Potential of amino-functionalized cellulose as an alternative sorbent intended to remove anionic dyes from aqueous solutions.
Int J Biol Macromol
; 116: 1282-1295, 2018 Sep.
Article
em En
| MEDLINE
| ID: mdl-29751041
Adsorption has been explored to minimize the pollution caused by dyes. This work relates the preparation of diethylenetriamine-modified cellulose (DetaCel) by reacting phthalic anhydride-modified cellulose (PhCel) with diethylenetriamine (Deta). Materials were characterized by Elemental Analysis and results showed a degree of incorporation of 5.55⯱â¯0.02â¯mmol of nitrogen per gram of modified material. The main bands observed for DetaCel by Fourier-Transform Infrared Spectroscospy (FTIR) were attributed to CN deformation (1330â¯cm-1) and NH stretching of amide (3400â¯cm-1), while Solid State Nuclear Magnetic Resonance of 13C (13C{1H}CP-MAS NMR) showed a signal at 164.6â¯ppm characteristic of amide group. Crystallinity index (CrI) obtained by X-Ray Diffraction (XRD) was 74.99 (Cel), 58.64 (PhCel) and 46.12% (DetaCel). Adsorbent matrices were employed to remove methyl orange (MO) and eosin (EY) dyes in aqueous medium. Data obtained experimentally from kinetic study had a better fit to the pseudo-first order, thus the adsorption process occurs in monolayer, with MO adsorption capacity by Cel and DetaCel of 2.19 and 65.45â¯mgâ¯g-1, respectively. For EY adsorption by Cel and DetaCel was 1.30 and 56.69â¯mgâ¯g-1, respectively. These results suggest that DetaCel can be used as an alternative potential for removal dyes in aqueous solution.
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Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Compostos Azo
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Celulose
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Amarelo de Eosina-(YS)
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Purificação da Água
Idioma:
En
Revista:
Int J Biol Macromol
Ano de publicação:
2018
Tipo de documento:
Article
País de afiliação:
Brasil
País de publicação:
Holanda