RT info:eu-repo/semantics/article
T1 Removal of As3+, As5+, Sb3+, and Hg2+ ions from aqueous solutions by pure and co-precipitated akaganeite nanoparticles: adsorption kinetics studies
A1 Villacorta, Verónica
A1 Barrero, César Augusto
A1 Turrión Nieves, María Belén
A1 Lafuente Álvarez, Francisco
A1 Greneche, Jean-Marc
A1 García, Karen Edilma
AB Adsorption kinetics models have been used to evaluate the adsorption behaviour of pollutants on different materials but there are no reports for the adsorption of As5+, As3+, Sb3+ and Hg2+ on co-precipitated akaganeite nanoparticles which were previously formed in the presence of these ions. In this research, the performance of pure and co-precipitated akaganeite nanoparticles as adsorbents of As3+, As5+, Sb3+ and Hg2+ in aqueous solutions was evaluated using the nonlinear kinetics models of Langmuir, Lagergren, Ho-McKay, Bangham, Elovich and simplified Elovich. In addition, transmission 57Fe Mössbauer spectrometry was used for the first time to compare the physico-chemical properties of akaganeite before and after the adsorption processes. The results showed that co-precipitated akaganeites had much better adsorption capacities than pure akaganeites. On the other hand, the Sb3+ and Hg2+ were the fastest and slowest pollutants respectively adsorbed on all akaganeites. The kinetics models that best described the experimental data for As3+, As5+ and Sb3+ were those of Elovich and simplified Elovich. For Hg2+, the kinetic model that best described the experimental data was that of Bangham. The 300 K and 77 K Mössbauer spectrometry showed only slight variations in some of the hyperfine parameters for the akaganeites after adsorption.
PB Royal Society of Chemistry
SN 20462069
YR 2020
FD 2020
LK https://uvadoc.uva.es/handle/10324/73252
UL https://uvadoc.uva.es/handle/10324/73252
LA spa
NO RSC Advances, November 2020, vol. 10, n. 70, 42688-42698
NO Producción Científica
DS UVaDOC
RD 15-abr-2025