An Innovative Method for Removing Ni (II) from Contaminated Water that Uses Amino Acids as Facilitating Agents on certain adsorbents

Abstract

Nickel-amino acid ligand complexes prepared using amino acids (AAs) Alanine (Ala), Asparagine (Asp), Glycine (GLy), Lysine (Lys), Valine (Val), and Hippuric acid (Hip) and the adsorption of Ligand-free Ni(II) and Ni-AAs complexes investigated on selected adsorbents, Montmorillonite (MMT), Activated Charcoal (AC), and Carbon Nano Particles (CNP). The formation of Ni-AA complexes' was validated by comparing their FTIR spectra to those of AAs. The AAS research endorsed that the adsorption of Ni(II) from complexes' was increased by chelating ligands (2297.77 ppm from Ni-Val), and by employing valine, the enhancement was 15.89% on MMT, 12.31% on AC, and 13.54% on CNP compared to Ligand-free Ni(II). Other measurements, such as XRD, SEM, and EDX, were employed to assess the absorption procedure. Thermogravimetric analysis (TGA) and the differential thermal analysis (DTA) demonstrated that the stability of Ni-AA complexes on adsorbents was stable up to 550oC, and desorption from the surface of adsorbents is endothermic.