Analysis of Natural Materials’ Adsorption Efficiency Relating Co(II) Using Atomic Absorption Spectroscopy: Laboratory Experiment

Abstract

A suitable combined laboratory experiment can involve more chemical disciplines and form students' views on practical connections. A laboratory experiment has been prepared focusing on the adsorption of the dangerous Co(II) ion using natural adsorbents representing waste material of a polysaccharide and keratin nature. Efficiency of Co(II) adsorption has been analyzed using an atomic adsorption spectroscopy method, and the adsorption results have been mutually compared. The students have acquired basic skills with an application of batch adsorption as well as with a spectral determination of the Co (II) adsorbate quantity. The importance of the experiment can be reflected in the context of the protection of the environment as well as circular economics.

Teaching Adsorption Chemistry by Constructing Surface Complexation Models (SCM) in PHREEQC

“…Despite being a fundamental process, adsorption is often missing from the teaching laboratory. , When included, the classic approach is to adsorb a colored dye onto a powdered adsorbent, and analyze the concentration of adsorbate remaining in solution using UV–vis spectrophotometry or colorimetry, − probably because optical detection is low-cost and widely available. , Classes reported in the last two decades have included a wider variety of analytical methods: atomic absorption spectroscopy (AAS), inductively coupled plasma emission spectroscopy (ICP-AES), and attenuated total reflectance Fourier Transform infrared (ATR-FTIR) spectroscopy . VanOursouw et al (2023) measured the adsorption of perfluoroalkyl substances (PFAS) using 19 F { 1 H} NMR spectroscopy .…”