Open AccessGADOLINIUM SORPTION ON MULTI-WALLED CARBON NANOTUBES
Author(s) -
Danijela D. Maksin,
Marija Vukčević,
Tatjana Đurkić,
Ivana Stanišić,
Tamara Bakić,
Milena Radomirović,
Antonije Onjia
Publication year - 2019
Publication title -
contemporary materials
Language(s) - English
Resource type - Journals
eISSN - 1986-8677
pISSN - 1986-8669
DOI - 10.7251/comen1901035m
Subject(s) - sorption , gadolinium , freundlich equation , carbon nanotube , langmuir , aqueous solution , materials science , lanthanide , kinetics , carbon fibers , chemical engineering , thermodynamics , chemistry , nanotechnology , adsorption , organic chemistry , metallurgy , composite material , ion , physics , quantum mechanics , composite number , engineering
Rare earth metals are deemed to be the materials of future due to their numerous applications including medical diagnostics, nuclear facilities, petroleum industry, etc. In this paper, multi-walled carbon nanotubes, which possess unique physicochemical properties, were evaluated as sorbents for lanthanoid gadolinium from aqueous solutions. The pH-dependent sorption behavior of Gd was studied in the pH range from 3 to 11 at room temperature (298 K). Equilibrium data over a range of initial Gd concentrations of 5−50 mg L−1 was analyzed with Langmuir, Freundlich and Redlich-Peterson models. Sorption kinetics was fitted with the pseudo-first-order, the pseudo-second-order and fractional power kinetic models.