Kinetic and Isotherm Models For Metal Removal Using Modified Graphene

Paper ID : 1045-ISCH

Authors

soha wael ahmed * M.Sc. student

Abstract

In a circular economy context, there is a growing need for more sustainable waste management options to recover elements from end-of-life materials. The study successfully synthesized eco-friendly green Holey graphene oxide (HGO) from agricultural waste using a safe, fast-designed method. The adsorbents were characterized using various spectroscopy methods. Green Holey graphene oxide (HGO) was used as a low-cost adsorbent for the removal of La (III) and Ni(II) from aqueous solutions, with optimal concentrations and time. Langmuir isotherm for the adsorption of La3+ and Ni2+ with a correlation coefficient, the adsorption is favourable and good adsorption. The DRK model and Temkin's isotherm equation assumes that adsorption is a chemical adsorption and endothermic process. The Halsey model is confirmed the obtained result from the Freundlich isotherm model. The pseudo-first-order model fitted with Ni 2+ , but The pseudo-second order model fitted with La 3+. Elovich kinetic model was prove that chemisorption processes. Moreover, Adsorption occurs on heterogeneous surface adsorbents, with exponential increase in sites, confirming multilayer adsorption .Further La3+ could be adsorbed from a binary mixture (Ni-metal) that

Keywords

metal removal , modified graphene , kinetic, isotherm

Status: Abstract Accepted (Poster Presentation)