Implementation of layer-by-layer chemical deposition technique for static removal of magnesium from various matrices

Abstract

A method is presented and described for implementation of layer-by-layer (LbL) chemical deposition technique as a novel, simple, efficient and low cost methodology for static removal of magnesium ion from various samples and matrices. The proposed method is based on selection of 8-hydroxyquinoline (8HQ) as the first deposited layer of chelating species on a glass substrate followed by sequential deposition of Mg(II) ion from its solution. This layer-by-layer procedure was further repeated several times for static formation of Mg(II)–8-hydroxiquinolate complex. The process of LbL chemical deposition technique for static removal of magnesium ion from aqueous solutions was monitored and evaluated under the influence of several important controlling factors such as dipping cycles, dipping time, Mg(II) concentration, pH of metal ion solution, exposed surface area, coexisting ions and temperature. The optimized factors were then utilized for potential applications of LbL chemical deposition as a promising technique for static removal of Mg(II) from sea and tap water samples as well as guava tree leaves and milk of magnesia pharmaceutical samples. The results of this study were found to prove superior behavior of LBL methodology for static removal and extraction of Mg(II) from the examined samples. The percentage extraction of magnesium from drinking tap water, sea water, milk of magnesia pharmaceutical and guava tree leaves samples were characterized as 95.86 ± 2.00%, 85.71 ± 4.00%, 96.54 ± 3.00% and 94.97 ± 4.00%, respectively.