The obtained experimental results suggested that among these absorbents, SiO2-BT exhibited the best performances for the removal of both Pr3+ and Nd3+ in aqueous solutions. We systematically investigated the influences of pH values, initial concentration of metal on the adsorption capacity, as well as the adsorption kinetics and adsorption isotherms. Subsequently, the absorbents were utilized for the removal of Pr3+ and Nd3+ from aqueous solution. The as-prepared absorbents were characterized by field emission scanning electron microscopy and Fourier transform infrared spectrometer.
#ANALIZE STOICHIOMETRY CHEMDRAW ULTRA 12 SERIES#
The Gd(III) Schiff base complex was found to be an efficient catalyst for the oxidation of aniline and substituted anilines under mild conditions.Ī series of novel absorbents (SiO2-BT, SiO2-BWT and SiO2-BT and BWT) were prepared by immobilizing plant tannins onto amine-modified silica. Thermal behaviour (TGA/DTA) and fluorescence nature of the complexes were also studied. The physico-chemical data suggested eight coordination number for Ln(III) Schiff base complexes. From the analytical data, the stoichiometry of the complexes was found to be 1:1 (metal:ligand). The FT-IR spectral data suggested that the ligand behaves as a tridentate ligand with one nitrogen and two oxygen donor atoms, sequence towards central metal ion. NO3 were characterized by elemental analysis, UV–vis., FT-IR, EPR, Mass spectrometry and Thermal analysis.Several new lanthanide complexes of Pr(III), Sm(III), Gd(III), Tb(III), Er(III) and Yb(III) with the sodium salt of the Schiff base, 2-5-methyl-pentanoic acid, derived from leucine and 5-bromosalicylaldehyde have been synthesized.
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