Abstracts Book - IMRC 2018

• SB1-P004
MODIFICATION OF BEADS OF CHITOSAN AND POLY(VINYL
ALCOHOL) BY MEANS OF LUMISCENT DISCHARGE PLASMA FOR
THE ADSORPTION OF RED 2 DYE
Antonio Alvarado Bonifacio 1 , Beatriz Garcia Gaitan 1 , José Luis García Rivas 1 , Rosa Elvira Zavala
Arce 1 , Celso Hernandez Tenorio 1 , María de la Luz Jiménez Núñez 1 , Teresa Soriano Aguilar 1
1
Tecnologico Nacional de Mexico/Instituto Tecnologico de Toluca, División de Estudios de
Posgrado e Investigación, Mexico.
The synthetic dyes that are present in the wastewater are responsible for many
harmful effects to the environment. Therefore, the objective of this work was to
modify beads of chitosan (Q) and poly(vinyl alcohol) (PVA) by means of glow
discharge plasma (GDP), as well as to determine its effect on the removal
capacity of red 2 dye in aqueous solutions. Three sizes of beads (1.1, 2.1 and 3
mm) of Q and PVA were generated, which were crosslinked with ethylene glycol
diglycidyl ether. The modification was carried out using a reactor with an
aqueous solution of Na2SO4, in which the beads were exposed to the GDP. The
adsorption experiments were carried out in triplicate in an orbital shaker at 30
° C, 200 rpm, at different initial pHs (2-7) and 72 h of contact. The concentrations
of the dye in the supernatants were determined by UV-vis spectrophotometry.
The 1.1 mm beads with and without modification, as well as the adsorbed and
non-adsorbed, were characterized by infrared spectroscopy with Fourier
transform and scanning electron microscopy. For the three sizes of beads the
modification generated a greater capacity of adsorption, which remained
practically constant throughout the pH range and whose averages were 1553,
956 and 812 mg/g for the beads of 1.1, 2.1 and 3 mm, respectively; while for
unmodified beads the adsorption capacity decreased 1255 to 211, 914 to 177
and 969 to 151 mg / g for the 1.1, 2.1 and 3 mm beads, respectively. This makes
the beads modified by GDP a robust material with respect to pH variation and a
good candidate to be used in the removal of synthetic dyes.
Acknowledgment:
The authors thank to the Tecnológico Nacional de México (project 6356.17-P)
and CONACYT for the scholarship No. 573727 granted to Alvarado-Bonifacio.
Keywords: Chitosan, Luminescent discharge plasma, Adsorption
Presenting authors email: touchmx2@gmail.com