الفهرس 
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Abstract
Heavy metal ions (HMIs) are one of the most toxic pollutants to the aquatic
environment. Adsorption and complexation are the most common facile process applied for
the removal of HMIs from wastewater. Many researches have been conducted to remove
HMIs using different adsorbents such as activated carbons, plant or lignocellulosic wastes,
clays and biopolymers. Among all biopolymeric materials, the most abundant natural
polyaminosaccharide, chitosan (CS) biosorbent, is considered to be the promising choice for
effective scavenging of HMIs from water because of its amazing features such as nontoxicity,
hydrophilicity, biodegradability, biocompatibility and the diversity of binding sites (NH2,
CONH and OH) in CS skeleton which enables it and its derivatives to chelate with various
MHIs in neutral aqueous solutions and thus it serves as an excellent and promising biosorbent
for MHIs from water effluents.
Motivated by this challenge, we aimed in this Thesis to enhance the HMIs (particularly,
Cu2+ and Pb2+) uptake by CS through fabrication of new modified biosorbents by the grafting
of salicylidene ionic liquid compartments on the CS surface, isolated from shrimp shell
waste. The thesis has been presented and organized as follow.