In this thesis, two research projects were investigated. In the first one, N 2 ,N 6 -di(thiazol-2-yl)pyridine-2,6-dicarboxamide (DPD) compound was synthesized. Its structure has been approved by FT-IR spectroscopy and NMR technique. On second project,Fe 3 O 4 magnetic nanoparticles were synthesized via co-precipitation procedure.consequently,Fe 3 O 4 magnetic nanoparticles were coated by DPD and Fe 3 O 4 @DPD Nano composite was prepared. Ability of heavy metal ions (Cd 2+, Zn 2+ ) removal from solution by DPD and Fe 3 o 4 @DPD has been studied. To obtain the optimum conditions effects of pH, contact time, metal ion concentration and the background electrolyte on absorption properties of both absorbances were investigated. Maximum absorption capacity of DPD for absorbing Cd 2+ and Zn 2+ were 128.21 and 90.09 mg/g and for the other absorbance , Fe 3 O 4 @DPD, were 149.25 and 112.36 mg/g respectively. In addition, it was found that presence of nitrogen and sulfur binding sites on the surface of the prepared DPD not only can significantly improve the adsorption capacity of the adsorbent but also can notably reduce the interferences of the alkaline/earth metal ions.These improvements are most probably due to higher affinity of the sulfur and nitrogen sites of the modified DPD for complex formation with the heavy metal ions via soft-soft interactions. The assumption that the metal ions adsorption is due to complex formation between active sites of the adsorbent and the heavy metal ions was further confirmed by investigating the adsorption isotherms and kinetics. The desorption experiments under batch conditions revealed that the both absorbances are reusable adsorbent for practical removal of the heavy metal ions. For testing the ability of the prepared nanoparticles for removal of heavy metal ions from industrial samples was evaluated using different industrial wastewaters from Moham industrial complex. The obtained resuls showed that DPD and Fe 3 O 4 @DPD Nano composite can be used for removal of heavy metal ions from industrial wastes.
