الفهرس 
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Abstract
Chemically cross linked gelatin and Gelatin /Chitosan blends were
successfully synthesized using glutaraldehyde as a crosslinker.
The samples show stability in aqueous media up to 35 0 C but
exhibit dissolution at higher temperatures. Adsorption efficiency
of the samples is examined using an aqueous solution of aniline
blue. Samples exhibit point of zero surface charge around pH 6.
Samples attain adsorption equilibrium within 6 h and did not
show saturation up to dye concentration of 100 mg L-1. kinetics
data fit pseudo second order model. The activation energy values
confirmed that the crosslinked gelatin and GelatinlChitosan
.” " ~ " ”
blends, up to 50% Chitosan content, exhibit physisorption
process. However, blend with 75% Chitosan exhibits higher
activation energy as an evidence of chemisorption behavior.
Freundlich isotherm showed a better fit than the Langmuir
isotherm, thus, indicating a multi layer adsorption of the dye on
the adsorbent surface. Thermodynamics studies indicate that the
adsorption is endothermic, spontaneous and leads to a higher
entropy. The maximum dye removal achieved by 1: 1
GelatinlChitosan at pH 5 and 35°C was 99.8%.These results
suggest that the GelatinlChitosan blend of 50 wt.% Gelatin and 50
wt.% Chitosan is a promising biodegradable eco-friendly
adsorbent that could be used for removal of anionic dyes from
wastewater.