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The photostabilization of polystyrene (PS) films by (4-amino-5-(2-(6-methoxynaphthalen-2yl)piperidino)-1,2,4-triazole-3-thion(L) compounds was investigated. PS films containing concentration of complexes 0.5% by weight were produced by the casting method from chloroform as a solvent. The photostabilization activities of these compounds were determined by monitoring the carbonyl and hydroxyl indices with irradiation time. The photostabilization of PS films by prepared complexes was investigated. The PS films containing concentration of complexes 0.5% by weight were produced by the casting method from (CHCl3) solvent. The photodegradation of the obtained films was investigated using UV-vis. spectra. The photostabilization activity of these compounds was determined by calculating the photodecomposition rate constant (kd) for the modified PS.

New schiff base bis (salicylidene) tetramethylbenzidine (bstmb) was prepared via the condensation of salicylaldehyde with 3, 3−, 5,5−-tetramethylbenzidine in an ethanol solution. Four complexes were prepared by reaction of schiff base with metal acetat where m(ii),[co, ni, cu, and zn]. The schiff base ligand and their complexes were characterized by using infrared, 1h nmr spectroscopy, uv-visible spectra, solubility, melting point, (c.h.n) analysis, and molar conductance. The potentiometer analysis of the metal complexes revealed 1:1 (schiff base: metal particle) stoichiometry.

New composite: chitosan-iron keplerate (CHIK) as an adsorbent was prepared by the stirring of chitosan and iron keplerate at 40°C in acidic medium. This compound beside the free chitosan and iron keplerate were characterized using Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy techniques. Chitosan film (CH), iron keplerate (IK) and CHIK composite were used as adsorbents for the removal of Cu(II) and Cd(II) ions from water following the batch equilibrium method at pH = 5.5 (adsorption studies were performed with respect to contact time and adsorbent mass). The adsorption of metal ion on the surface of compounds was carried out by the aid of atomic absorption spectrophotometer. The adsorption studies displayed that the adsorption capacity of the free chitosan or free iron keplerate was enhanced upon the composition. The isothermal behavior together with the adsorption kinetics of metal ions on CHIK composite as a function of the temperature and the initial mass of CHIK were also studied. The two well-known isotherm models (Langmuir and Freundlich equations) were applied to fit the experimental data. The results show that the experimental data of the metal ion adsorption correlates well with the Langmuir isotherm equation.