ISSN 1070-4272, Russian Journal of Applied Chemistry, 2016, Vol. 89, No. 12, pp. 1991−2000. © Pleiades Publishing, Ltd., 2016.
The text was submitted by the authors in English.
The presence of heavy metals in the aquatic
environment is a source of a great environmental concern.
Copper is known to be one of the heavy metals most toxic
to living organisms and it is one of the more widespread
heavy-metal contaminants of the environment [1, 2]. The
potential sources of copper in industrial efﬂ uents include
metal cleaning and plating baths, electrical industry,
chemical catalysis, pulp and paper board mills, wood
pulp production, fertilizer industry, etc. The conventional
methods for copper(II) removal from wastewater are the
precipitation, ion exchange, electrolysis, adsorption, etc.
The most efﬁ cient method for removal of copper from
aqueous efﬂ uents is the adsorption technique . One
of the most widely used adsorbents is activated carbon
due to its high adsorption capacity [5‒7]. However,
this adsorbent is expensive and difﬁ cult to regenerate.
Therefore, much attention has been recently focused
on biosorbent materials [8‒11], which are inexpensive,
can be obtained from renewable resources, and are
harmless to nature. Special attention has been given to
polysaccharides, such as chitosan.
Chitosan is the partly deacetylated polysaccharide of
chitin, which is the second most abundant natural polymer
in the world and widely exists in numerous crustaceans
and insects [12, 13]. The application of chitosan is due to
its unique physical and biological properties, such as low
toxicity, hemostatic potential, good ﬁ lm formation ability,
A Comparative Study on the Chitosan Membranes Prepared
From Acetic Acid and Glycine Hydrochloride
for Removal of Copper
and S. Kara Slimane
Inorganic Chemistry and Environment Laboratory, Department of Chemistry, Faculty of Sciences, Tlemcen University,
Tlemcen 13000, Algeria
Research Laboratory on the Macromolecules, Department of Chemistry, Faculty of Sciences, Tlemcen University,
Tlemcen 13000, Algeria
Received October 4, 2016
Abstract—Application of chitosan-based materials as adsorbents in wastewater treatment has received considerable
attention in recent years. This study is concerned with the inﬂ uence of various parameters of the reaction medium
with a metal and a biosorbant on the kinetics of copper biosorption from synthetic solutions. Initially, we prepared
pure chitosan-based membranes and those modiﬁ ed in two different ways: chitosan membrane prepared from
traditional acetic acid and the membrane prepared from glycine hydrochloride, chitosan membranes modiﬁ ed such
as chitosan/polyvinyl alcohol (PVA) blends membrane with different compositions (100/0, 80/20, 50/50, 20/80
and 0/100%) and chitosan membranes cross-linked with glutaraldehyde. The membranes were characterized by
FTIR spectroscopy, DSC, and rheological measurements. Then, we studied the kinetics of copper biosorption by
the membranes. The results suggest that adding PVA to a chitosan membrane can greatly improve the ﬂ exibility
and wettability of chitosan membranes. The values attained in equilibrium for the chitosan membranes prepared
from glycine hydrochloride (95.5 mg g
for chitosan/PVA 50/50%) exceed those for chitosan membranes prepared
from acetic acid (61.5 mg/g for chitosan/PVA 50/50%).