Removal of lead ion from environmental samples using modified glass nanoparticles

Allylamine and N,N-dimethylacrylamide were graft-polymerized to modified silylate glass nanoparticles with 3-mercaptopropyltrimethoxysilane. Then, the grafted polymeric chines were modified with bromoacetic acid. The final grafted nanoglass was characterized through Fourier transform infra-red spectroscopy, elemental analysis, scanning electron microscopy, and transmission electron microscopy. The trace amounts of Pb (II) ions from milk, human plasma, and environmental water samples were successfully removed by grafted nanoglass, which shows the chelating sites on nanosorbent were suitably accessible for Pb (II) in the sample. The optimal pH value for Pb (II) adsorption was measured to be 5.5 in batch mode. The adsorption capacity of the sorbent was obtained to be 26.7 mg g(-1) for Pb (II) under the optimal conditions. For designing the equilibrium data of the sorption process, the Temkin, Langmuir, and Freundlich models were applied as the adsorption isotherms with the constants of 3.97 (J mol(-1)), 0.34 (L and 10.1 (mg 0 (L mg(-1))(1/n) under the optimum pH value of 5.5 at ambient temperature, respectively.