Facile synthesis of a novel nanocomposite for determination of mercury and copper ions in food and water samples

Abstract

This paper describes the modification of sodium aluminum silicate hydrate by 3-bromo-5-chlorosalicylaldehyde to form a new composite. Furthermore, X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), Transmission electron microscopy (TEM), CHN elemental analysis, Nitrogen gas sorption analyzer, and Scanning electron microscopy (SEM) tools were used for characterizing the synthesized composite. The XRD pattern of the synthesized composite shows a halo at 2Θ = 25°, confirming the destruction of the crystalline structure of the nanomaterial owing to the association with an organic substance. The synthesized composite was utilized for the removal and preconcentration of mercury and copper ions from water and food samples. The maximum adsorption capacity of the synthesized composite towards mercury and copper ions is 107.53 and 130.89 mg/g, respectively. In addition, the relative standard deviation was less than 3 %, showing excellent reproducibility. The dynamic analytical ranges are 0.8–380 μg/L and 1.00–550 μg/L for copper and mercury ions, respectively. The preconcentration factor is 10.