TITLE:
The Use of New Chemically Modified Cellulose for Heavy Metal Ion Adsorption and Antimicrobial Activities
AUTHORS:
R. Saravanan, L. Ravikumar
KEYWORDS:
Modified Cellulose, Metal Ion Adsorption, Anti-Bacterial Activity
JOURNAL NAME:
Journal of Water Resource and Protection,
Vol.7 No.6,
April
27,
2015
ABSTRACT: A novel chemically modified cellulose (DTD) adsorbent bearing pendent
methyl benzalaniline chelating group was synthesized. This new
adsorbent was used for the removal of Cu2+ and Pb2+ heavy
metal ions from aqueous solution. The chemical and structural characteristics
of the adsorbent were determined using FT-IR, 13C CP-MAS NMR, SEM,
EDX and TGA analysis. The adsorption parameters, such as pH, adsorbent dose,
contact time, initial metal ion concentration and temperature were optimized.
Adsorption kinetic parameters were fitted into pseudo-first-order and pseudo-second-order models. The kinetic data fitted well to the
pseudo-second-order kinetic model. The adsorption isotherms such as Freundlich
and Langmuir isotherms have been investigated. Thermodynamic parameters have
also been evaluated. The negative values of △G0 and △H0 reveal that the adsorption system is
spontaneous and exothermic in nature. The modified cellulose was challenged
with microorganisms as a function of contact time. The biocidal results showed
that the chemically modified cellulose has bactericidal effect against the
bacterial species.