The electrochemical properties of the complexation was applied to evaluate different thermodynamic parameters (G, H and S) for the cadmium (II)-tyrosine compound using voltammetric technique. The measurements have been investigated by square wave voltammetry using three electrode system consists of solid (platinum as working and auxiliary electrode) and Ag/AgCl immersed in saturated KCl as a reference electrode using to phosphate buffer solution (pH=7) at the range of temperatures (293-313K). Cadmium has a reduction peak potential at (-0.760 V) which is decrease gradually with an increasing of tyrosine concentrations added. Hartree-Fock calculations at basis set (STO-3G) were applied to evaluate the physic-chemical properties like bond length, bond angle, torsion and the thermodynamic parameters.
A novel Vanadium(IV) ion-imprinted polymers (IIPs) was synthesized by bulk polymerization using different types of monomers such as1-vinyl imidazole and Styrene, respectively. molar ratios of template, monomer and cross-linking agent for polymerization, solvents and Various monomers were studied to obtain the largest adsorption capacity for Vanadium. The prepared Vanadium-IIPs were characterized using Fourier -transform infrared spectroscopy (FTIR), energy dispersive X-ray spectroscopy (EDX) and Scanning electron microscopy (SEM). The process of elution has no influence on the threedimension network structure surfaces of Vanadium-IIPs. Vanadium(IV) ions could be eluted from IIPs successfully by mixture solution from ethanol and acetic acid. The maximum adsorption capacity of vanadium-IIPs was (568)µmol/g for Vanadium-IIP1(using styrene as a monomer) and ( 491)µmol/g for Vanadium-IIP2(using 1-vinyl imidazole as a monomer). The adsorption by Vanadium-IIPs followed a Langmuir isotherm models. Solid-phase extraction (SPE) syringe packed with ionic imprinted polymers (IIPs) were used to selective separation for Vanadium (IV) ion from Crude or fuel oil and digest the polymer to determination the Vanadium by flame atomic absorption spectroscopy (FAAS) Abbreviation IIP-SPE-FAAS.
The initiated photodegradation of polystyrene films notice able all around were examined (for 400 hrs.) in the being and absence of Schiff bases for benzoxazin product compounds by quickened weathering analyzer. The adding of (0.1% wt/v) of organic compounds to polystyrene films (thickness, 25µm) diminished the degradation of the polystyrene. The rate of degradation was trailed by an expansion in absorbtion of carbonyl for polymers utilizing viscosity, I.R., and UV spectra estimation. As per the results, the initiated degradation instruments of polystyrene films were recommended under the exploratory term utilized utilizing temperature 45 o C, radiation of UV at λ = 313 nm , illumination force 3.49x10 -5 einsteins.dm -3 .S -1 .
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