RT info:eu-repo/semantics/article
T1 Kinetic analysis of lead removal by natural hydroxyapatite from aqueous solution in high concentration
A1 Caballero González, Norma Beatriz
A1 Casanova Ozuna, Pablo Javier
A1 Monteiro Schaerer, Magna María
A2 Universidad Nacional de Asunción. Facultad Politécnica
AB The aim of this work was to study of the kinetic of Pb(II) sorption, in high lead concentration aqueous solution, by the natural hydroxyapatite (HA) and to verify whether there is a different behavior between natural and synthetic HA under different lead concentrations. Batch experiments were carried out using solutions with high lead concentration, with the objective to evaluate the effect of contact time, HA dosage and initial metal concentration on lead removal. Kinetic data were analyzed by pseudo-first and pseudo-second order models. The sorption data was then correlated with the Langmuir and Freundlich isotherm models. The PZC obtained was slightly different than those reported by other authors, who evaluated the process under low concentrations and synthetic HA as adsorbent. It was possible to identify the optimum relation between Pb(II) concentrations and mass of HA for efficiency of approximately 100% at optimum contact time. Although the results show a certain instability during the removal of lead when the concentration is much higher, the process can be considered effective. Liquid samples were analyzed by atomic absorption spectroscopy and solid samples were by X-ray diffraction and Fourier transform infrared spectroscopy.
PB Associação Brasileira de Metalurgia e Materiais
SN 1516-1439
YR 2019
FD 2019-09-30
LK http://hdl.handle.net/20.500.14066/4528
UL http://hdl.handle.net/20.500.14066/4528
LA eng
NO Caballero, N., Casanova Ozuna, P., & Monteiro, M. (2019). Kinetic analysis of lead removal by natural hydroxyapatite from aqueous solution in high concentration. Materials Research Ibero-american Journal of Materials, 22, Artículo e20180859.http://dx.doi.org/10.1590/1980-5373-MR-2018-0859
NO Correspondencia: Magna Monteiro, e-mail: mmonteiro@pol.una.py
NO Consejo Nacional de Ciencia y Tecnología
DS MINDS@UW
RD 12-mar-2025