Adsorption of Mercury on Oxidized Graphenes.
Talia TeneStefano BellucciMarco GuevaraFabian AriasMiguel Ángel Sáez PaguayJohn Marcos Quispillo MoyotaMelvin Arias PolancoAndrea ScarcelloCristian Vacacela GomezSalvatore StrafaceLorenzo S CaputiF Javier TorresPublished in: Nanomaterials (Basel, Switzerland) (2022)
Graphene oxide (GO) and its reduced form, reduced graphene oxide (rGO), are among the most predominant graphene derivatives because their unique properties make them efficient adsorbent nanomaterials for water treatment. Although extra-functionalized GO and rGO are customarily employed for the removal of pollutants from aqueous solutions, the adsorption of heavy metals on non-extra-functionalized oxidized graphenes has not been thoroughly studied. Herein, the adsorption of mercury(II) (Hg(II)) on eco-friendly-prepared oxidized graphenes is reported. The work covers the preparation of GO and rGO as well as their characterization. In a further stage, the description of the adsorption mechanism is developed in terms of the kinetics, the associated isotherms, and the thermodynamics of the process. The interaction between Hg(II) and different positions of the oxidized graphene surface is explored by DFT calculations. The study outcomes particularly demonstrate that pristine rGO has better adsorbent properties compared to pristine GO and even other extra-functionalized ones.
Keyphrases
- aqueous solution
- reduced graphene oxide
- gold nanoparticles
- low density lipoprotein
- heavy metals
- molecularly imprinted
- quantum dots
- walled carbon nanotubes
- density functional theory
- risk assessment
- room temperature
- molecular dynamics
- molecular dynamics simulations
- health risk
- carbon nanotubes
- solid phase extraction
- smoking cessation
- insulin resistance