Fabrication of Solid phase extraction Hg(П) ions in water samples by layered double hydroxide Fe@Mg-Al
Subject Areas : International Journal of Bio-Inorganic Hybrid Nanomaterials
Keywords: Preconcentration, SPE, CVAAS, Fe@Mg-Al LDH, Layered double hydroxide (LDH),
Abstract :
Layered double hydroxide (LDH) has recently attracted the attention of chemists in the use of these materials as organic and inorganic composites. LDHs have relatively weak intra-layer bonds and so have a high ability to capture organic and inorganic ions. In this study, the superparamagnetic adsorbent as Fe@Mg-Al LDH was synthesized by different methods with two-step for the removal of heavy metal ions from water samples. An easy, practical, economical, and replicable method was introduced to remove water contaminants, including heavy ions from aquatic environments. For better separation, the ethylenediaminetetraacetic acid ligand was used, forming a complex with Hg2+ ions to create suitable conditions for the removal of these ions. This was treated with ethylenediaminetetraacetic acid ligand in another solvent-free procedure for the formation of a Fe@Mg-Al LDH. Cold vapor atomic absorption spectrometry (CVAAS) was utilized for determination of Hg2+. The effects of solution pH solution, elution conditions on pre-concentration of trace Hg2+ were studied and the effect of interfering ions was also investigated. Preconcentration factor was 100 .The method was successfully applied to the recovery of Hg2+ in different type of water samples.Hg2+ ions was studied by floating in aqueous environments with this superparamagnetic adsorbent due to effective factors such as pH, the amount of superparamagnetic adsorbent, contact time, sample temperature, volume, and ligand concentration.