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Abstract The present thesis has three main chapters namely the introduction, experimental and results and discussion. Chapter 1-Introduction This chapter represents a general description of affection of cadmium on water and fish. This chapter represents a scientific review concerned with the most popular separation and extraction technologies such as ion exchange, solvent extraction and the widely used solid-phase extraction technique (SPE). A special focus on the literature of raw chitosan, modification, chitosan-based sorbents and sorption properties in the field of separation and preconcentration of different metal ions. Chapter 2-Experimental This chapter represents the experimental work under study in the present thesis including chemicals, reagents, instruments, and analytical methods for cadmium determination. Also, this section represents the preparation and characterization of two nanomagnatic chitosan α- aminophosphonates. It also gives the details about the variables affects adsorption behaviors of Cd(II) from aqueous solutions on the investigated resins and followed by elution experiments and sorbent regeneration. |