Determination of the Ni(II) Ions Sorption Mechanism on Dowex PSR2 and Dowex PSR3 Ion Exchangers Based on Spectroscopic Studies.
Justyna BąkWeronika Sofińska-ChmielMaria GajewskaPaulina MalinowskaDorota KołodyńskaPublished in: Materials (Basel, Switzerland) (2023)
This paper estimates the suitability of the strongly basic anion exchangers, Dowex PSR2 and Dowex PSR3, as sorbents of nickel ions in aqueous solutions. These actions are aimed at searching for new solutions due to the growing discharge of nickel into wastewaters, primarily due to its addition to steel. The nickel sorption experiments were conducted under static conditions and resulted in the optimization of pH, phase contact time, initial solution concentration, and temperature. The next step was to calculate the kinetic, isothermal, and thermodynamic parameters. Moreover, the ion exchangers were characterized by means of Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, and CHN elemental analysis. It was found that the sorption process was most effective at pH 6 after 240 min and at the temperature of 293 K. The values of the thermodynamic parameters revealed that the adsorption was exothermic and spontaneous. The physicochemical analyses combined with the experimental research enabled determination of the sorption mechanism of Ni(II) ions.
Keyphrases
- aqueous solution
- metal organic framework
- sewage sludge
- solid phase extraction
- quantum dots
- organic matter
- reduced graphene oxide
- high resolution
- oxide nanoparticles
- carbon nanotubes
- molecularly imprinted
- molecular docking
- single cell
- water soluble
- magnetic resonance
- ionic liquid
- risk assessment
- single molecule
- heavy metals
- magnetic resonance imaging
- case control
- molecular dynamics simulations
- mass spectrometry
- liquid chromatography
- dual energy