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Adsorption of Uranyl Ions at the Nano-hydroxyapatite and Its Modification
Nano-hydroxyapatite and its modification, hydroxyapatite with the excess of phosphorus (P-HAP) and hydroxyapatite with the carbon ions built into the structure (C-HAP), were prepared by the wet method. They were studied by means of XRD, accelerated surface area and porosimetry (ASAP), and SEM. The s...
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Springer US
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5400201/ https://www.ncbi.nlm.nih.gov/pubmed/28423864 http://dx.doi.org/10.1186/s11671-017-2042-8 |
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author | Skwarek, Ewa Gładysz–Płaska, Agnieszka Bolbukh, Yuliia |
author_facet | Skwarek, Ewa Gładysz–Płaska, Agnieszka Bolbukh, Yuliia |
author_sort | Skwarek, Ewa |
collection | PubMed |
description | Nano-hydroxyapatite and its modification, hydroxyapatite with the excess of phosphorus (P-HAP) and hydroxyapatite with the carbon ions built into the structure (C-HAP), were prepared by the wet method. They were studied by means of XRD, accelerated surface area and porosimetry (ASAP), and SEM. The size of crystallites computed using the Scherrer method was nano-hydroxyapatite (HAP) = 20 nm; P-HAP—impossible to determine; C-HAP = 22 nm; nano-HAP/U(VI) = 13.7 nm; P-HAP/U(VI)—impossible to determine, C-HAP/U(VI) = 11 nm. There were determined basic parameters characterizing the double electrical layer at the nano-HAP/electrolyte and P-HAP/electrolyte, C-HAP/electrolyte inter faces: density of the surface charge and zeta potential. The adsorption properties of nano-HAP sorbent in relation to U(VI) ions were studied by the batch technique. The adsorption processes were rapid in the first 60 min and reached the equilibrium within approximately 120 min (for P-HAP) and 300 min (for C-HAP and nano-HAP). The adsorption process fitted well with the pseudo-second-order kinetics. The Freundlich, Langmuir–Freundlich, and Dubinin–Radushkevich models of isotherms were examined for their ability to the equilibrium sorption data. The maximum adsorption capabilities (q (m)) were 7.75 g/g for P-HAP, 1.77 g/g for C-HAP, and 0.8 g/g for HAP at 293 K. |
format | Online Article Text |
id | pubmed-5400201 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Springer US |
record_format | MEDLINE/PubMed |
spelling | pubmed-54002012017-05-08 Adsorption of Uranyl Ions at the Nano-hydroxyapatite and Its Modification Skwarek, Ewa Gładysz–Płaska, Agnieszka Bolbukh, Yuliia Nanoscale Res Lett Nano Express Nano-hydroxyapatite and its modification, hydroxyapatite with the excess of phosphorus (P-HAP) and hydroxyapatite with the carbon ions built into the structure (C-HAP), were prepared by the wet method. They were studied by means of XRD, accelerated surface area and porosimetry (ASAP), and SEM. The size of crystallites computed using the Scherrer method was nano-hydroxyapatite (HAP) = 20 nm; P-HAP—impossible to determine; C-HAP = 22 nm; nano-HAP/U(VI) = 13.7 nm; P-HAP/U(VI)—impossible to determine, C-HAP/U(VI) = 11 nm. There were determined basic parameters characterizing the double electrical layer at the nano-HAP/electrolyte and P-HAP/electrolyte, C-HAP/electrolyte inter faces: density of the surface charge and zeta potential. The adsorption properties of nano-HAP sorbent in relation to U(VI) ions were studied by the batch technique. The adsorption processes were rapid in the first 60 min and reached the equilibrium within approximately 120 min (for P-HAP) and 300 min (for C-HAP and nano-HAP). The adsorption process fitted well with the pseudo-second-order kinetics. The Freundlich, Langmuir–Freundlich, and Dubinin–Radushkevich models of isotherms were examined for their ability to the equilibrium sorption data. The maximum adsorption capabilities (q (m)) were 7.75 g/g for P-HAP, 1.77 g/g for C-HAP, and 0.8 g/g for HAP at 293 K. Springer US 2017-04-18 /pmc/articles/PMC5400201/ /pubmed/28423864 http://dx.doi.org/10.1186/s11671-017-2042-8 Text en © The Author(s). 2017 Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. |
spellingShingle | Nano Express Skwarek, Ewa Gładysz–Płaska, Agnieszka Bolbukh, Yuliia Adsorption of Uranyl Ions at the Nano-hydroxyapatite and Its Modification |
title | Adsorption of Uranyl Ions at the
Nano-hydroxyapatite and Its Modification |
title_full | Adsorption of Uranyl Ions at the
Nano-hydroxyapatite and Its Modification |
title_fullStr | Adsorption of Uranyl Ions at the
Nano-hydroxyapatite and Its Modification |
title_full_unstemmed | Adsorption of Uranyl Ions at the
Nano-hydroxyapatite and Its Modification |
title_short | Adsorption of Uranyl Ions at the
Nano-hydroxyapatite and Its Modification |
title_sort | adsorption of uranyl ions at the
nano-hydroxyapatite and its modification |
topic | Nano Express |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5400201/ https://www.ncbi.nlm.nih.gov/pubmed/28423864 http://dx.doi.org/10.1186/s11671-017-2042-8 |
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