Page 15 - Book of Abstracts 2020

th
8 Biannual Conference on Chemistry - CHEM 08

Polyacrylamide/functionalized-Multiwalled Carbon

Nanotubes Hybrid Nanocomposites Hydrogels for Efficient
Water Treatment

1
2
MennatAllah M. Ali , Ahmed M. Alsabagh , Magdy W. Sabaa , Radwa
2
A. El-Salamony , Riham R. Mohamed , Rania E. Morsi 2
2
1
1 Cairo University, Faculty of Science, Chemistry Department, 12613,
Giza, Egypt, Egyptian Petroleum Research Institute, Nasr City, 11727,
2
Cairo, Egypt

ABSTRACT

Spherical polyacrylamide nanoparticles (PAM-NPs) were prepared by inverse
emulsion polymerization technique. Polyacrylamide/functionalized-
multiwalled carbon nanotubes (PAM/f-MWCNTs) nanocomposites were
successfully prepared by in situ emulsion polymerization and solution mixing
methods to investigate their efficiencies in removal of organic dyes.
Nanocomposites preparation was successfully proved via FTIR, XRD and SEM
analysis. In case of in-situ inverse emulsion polymerization technique, water
absorption decreased as the amount of f-MWCNT increased as follows: PAM/1
% f-MWCNT (1906 %) ˂ PAM/0.1 % f-MWCNT (2148 %) ˂ PAM/0.05 % f-
MWCNT (2315 %) ˂ PAM (3664 %), while water uptake capacity of PAM/f-
MWCNT nanocomposites prepared by solution mixing method increased with
increasing the amount of f-MWCNT as follows: PAM (2696 %) ˂ PAM/0.05 % f-
MWCNT (2857 %) ˂ PAM/0.1 % f-MWCNT (3402 %) ˂ PAM/1 % f-MWCNT (3664
%). This could be attributed to the difference in interaction between PAM and f-
MWCNTs by applying different preparation methods. The obtained results
revealed that the efficiency of the removal of the dyes increased as the f-MWCNT
loading increased, thus after 60 min at dark, the adsorption efficiency was 18 %
and 24 % for CR and MG dyes; respectively, using PAM/1% f-MWCNT
nanocomposite. On the other hand, it reached maximum of 49% and 80% for CR
and MG dyes, respectively using PAM/1% f-MWCNT nanocomposite after 240
min irradiation time. Pseudo-second order kinetic model best fits the adsorption
kinetics behavior. In this work, it was found that the combination of PAM-NPs,
prepared by inverse emulsion polymerization technique and the f-MWCNTs
with its high adsorption activity reduced both the amount of catalyst and the risk
of fine catalyst dispersion in the treated water.

BOOK OF ABSTRACTS CHEM 08 (2020) Page 14