Page 34 - Book of Abstracts 2020

8 Biannual Conference on Chemistry - CHEM 08
th

Smart Bactericidal Filter Containing Biodegradable

Polymers for Crystal Violet Dye Adsorption

Mahmoud H. Abu Elella
Chemistry Department, Faculty of Science, Cairo University, Giza, 12613,
Egypt

ABSTRACT

Facile and green method was utilized for preparing an efficient dual

function adsorbent as a filter for capturing crystal violet (CV) dye and
inhibiting the growth of E. coli based on interpenetrating networks (IPNs)
between N, N, N- trimethyl chitosan (TMC) and xanthan gum (XG) in
different weight ratios. The structure of IPNs was characterized with
different analysis tools: FTIR, XRD and FE-SEM. Their thermal stability
was investigated with TGA technique. FTIR spectra and FE-SEM images
supported the formation of TMC / XG IPNs hydrogels through
electrostatic and H-bonding interactions. Also, XRD patterns showed that
the prepared IPNs samples had more crystallinity than both TMC and XG
alone. On the other hand, the results of thermal stability showed that the
prepared IPNs samples were more thermally stable than pure XG.
Furthermore, antibacterial activities of TMC / XG IPNs films were
addressed against E.coli and the results showed their performance
inhibiting of E.coli growth. Different factors could affect the efficiency of
CV dye adsorption such as initial concentration of dye, adsorbent dosage,
pH and temperature of the solution and contact time of adsorption. IPNs
depicts an excellent high CV dye adsorption capacity (94.4%, Qmax = 555.6
-1
mgg ). Also, they show a well fitting curve with respect to the Langmuir
isotherm model. Moreover, pseudo-first order and intraparticle diffusion
model could participate in the mechanism of CV adsorption on TMC/XG
surface. In addition, the results of regeneration studies showed that 86.1%
th
of CV dye was desorbed after the 4 adsorption-desorption cycle. So, they
confirmed the efficiency desorption ability of the CV loaded IPN.

Keywords: N, N, N-Trimethyl chitosan chloride, Xanthan gum, Interpenetrating
polymer network, Adsorption capacity, antibacterial activity.

BOOK OF ABSTRACTS CHEM 08 (2020) Page 33