The solid copper(II) soap derived from Neem (Azadirechta Indica)oil and its complex with ligand containing nitrogen, sulphur and oxygen atoms like 2-amino -6-nitro benzothiazole and 2-amino- 6-ethoxy benzothiazole have been synthesized and characterised by elemental analysis, IR spectroscopy and biological studies. From the analytical data, the stoichiometry of the complex has been observed to be 1:1 (metal:ligand). The derived compounds were found active against Staphylococcus aureus,Coagulase-negative staphylococci (CoNs), Acinetobacter baumanii, Pseudomonas aeruginosa and micrococcus bacteria. These findings have high medical, industrial and economic significance as copper (II) soap and copper (II) soap complex could be harnessed in the formulation of medicated soaps.
Present paper reports the synthesis of copper neem urea complex (CNU) by reported methods and its characterization by elemental and spectroscopic techniques such as IR, NMR, and ESR. The NPs of ZnO and doped with SiO2 which was extracted from industrial ash’s) was synthesized by precipitation method and characterized by UV, SEM-EDX and XRD techniques. Three low cost adsorbents such as synthetic ZnO, nano ZnO and doped ZnO with SiO2were chosen for the adsorption of copper surfactant complex of urea from non-aqueous solutions. Effect of contact time, pH, adsorbent dosage, temperature and initial metal concentration on the removal of CNU were investigated and optimized. Isothermal studies indicated that the adsorption of CNU followed Langmuir adsorption isotherm. Reaction kinetic studies indicated that removal of the CNU by the three adsorbents followed pseudo second order kinetics. With a maximum adsorption capacity of 7.58 mg/g using all three adsorbents showed an effective and efficient removal 95.8% of CNU from non-aqueous solutions by using ZnO doped with SiO2 compare to synthetic ZnO and nano ZnO. The three adsorbents chosen for the present study have not been used so far in the removal of CNU.
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