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Synthesis of diglycolic acid functionalized core-shell silica coated Fe(3)O(4) nanomaterials for magnetic extraction of Pb(II) and Cr(VI) ions
Amine-terminated core-shell silica coated magnetite nanoparticles were functionalized with diglycolic acid for the first time to create acid moiety on the surface of the nanoparticles. The formation of magnetite nanoparticles was scrutinised through XRD, SEM, EDS, TEM, VSM and FTIR spectroscopy. The...
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Nature Publishing Group UK
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7308298/ https://www.ncbi.nlm.nih.gov/pubmed/32572117 http://dx.doi.org/10.1038/s41598-020-67168-2 |
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author | Nawaz, Tehreema Zulfiqar, Sonia Sarwar, Muhammad Ilyas Iqbal, Mudassir |
author_facet | Nawaz, Tehreema Zulfiqar, Sonia Sarwar, Muhammad Ilyas Iqbal, Mudassir |
author_sort | Nawaz, Tehreema |
collection | PubMed |
description | Amine-terminated core-shell silica coated magnetite nanoparticles were functionalized with diglycolic acid for the first time to create acid moiety on the surface of the nanoparticles. The formation of magnetite nanoparticles was scrutinised through XRD, SEM, EDS, TEM, VSM and FTIR spectroscopy. The BET surface area of nano-sorbent was found to be 4.04 m(2)/g with pore size 23.68 nm. These nanomaterials were then utilized to remove the Pb(II) and Cr(VI) ions from their aqueous media and uptake of metal ions was determined by atomic absorption spectroscopy (AAS). A batch adsorption technique was applied to remove both ions at optimised pH and contact time with maximum adsorption efficiency for Pb(II) ions at pH 7 while for Cr(VI) ions at pH 3. Adsorption mechanism was studied using Langmuir and Freundlich isotherms and equilibrium data fitted well for both the isotherms, showing complex nature of adsorption comprising both chemisorption as well as physio-sorption phenomena. The nanosorbents exhibited facile separation by applying external magnetic field due to the ferrimagnetic behaviour with 31.65 emu/g saturation magnetization. These nanosorbents were also found to be used multiple times after regeneration. |
format | Online Article Text |
id | pubmed-7308298 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Nature Publishing Group UK |
record_format | MEDLINE/PubMed |
spelling | pubmed-73082982020-06-23 Synthesis of diglycolic acid functionalized core-shell silica coated Fe(3)O(4) nanomaterials for magnetic extraction of Pb(II) and Cr(VI) ions Nawaz, Tehreema Zulfiqar, Sonia Sarwar, Muhammad Ilyas Iqbal, Mudassir Sci Rep Article Amine-terminated core-shell silica coated magnetite nanoparticles were functionalized with diglycolic acid for the first time to create acid moiety on the surface of the nanoparticles. The formation of magnetite nanoparticles was scrutinised through XRD, SEM, EDS, TEM, VSM and FTIR spectroscopy. The BET surface area of nano-sorbent was found to be 4.04 m(2)/g with pore size 23.68 nm. These nanomaterials were then utilized to remove the Pb(II) and Cr(VI) ions from their aqueous media and uptake of metal ions was determined by atomic absorption spectroscopy (AAS). A batch adsorption technique was applied to remove both ions at optimised pH and contact time with maximum adsorption efficiency for Pb(II) ions at pH 7 while for Cr(VI) ions at pH 3. Adsorption mechanism was studied using Langmuir and Freundlich isotherms and equilibrium data fitted well for both the isotherms, showing complex nature of adsorption comprising both chemisorption as well as physio-sorption phenomena. The nanosorbents exhibited facile separation by applying external magnetic field due to the ferrimagnetic behaviour with 31.65 emu/g saturation magnetization. These nanosorbents were also found to be used multiple times after regeneration. Nature Publishing Group UK 2020-06-22 /pmc/articles/PMC7308298/ /pubmed/32572117 http://dx.doi.org/10.1038/s41598-020-67168-2 Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as 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. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Nawaz, Tehreema Zulfiqar, Sonia Sarwar, Muhammad Ilyas Iqbal, Mudassir Synthesis of diglycolic acid functionalized core-shell silica coated Fe(3)O(4) nanomaterials for magnetic extraction of Pb(II) and Cr(VI) ions |
title | Synthesis of diglycolic acid functionalized core-shell silica coated Fe(3)O(4) nanomaterials for magnetic extraction of Pb(II) and Cr(VI) ions |
title_full | Synthesis of diglycolic acid functionalized core-shell silica coated Fe(3)O(4) nanomaterials for magnetic extraction of Pb(II) and Cr(VI) ions |
title_fullStr | Synthesis of diglycolic acid functionalized core-shell silica coated Fe(3)O(4) nanomaterials for magnetic extraction of Pb(II) and Cr(VI) ions |
title_full_unstemmed | Synthesis of diglycolic acid functionalized core-shell silica coated Fe(3)O(4) nanomaterials for magnetic extraction of Pb(II) and Cr(VI) ions |
title_short | Synthesis of diglycolic acid functionalized core-shell silica coated Fe(3)O(4) nanomaterials for magnetic extraction of Pb(II) and Cr(VI) ions |
title_sort | synthesis of diglycolic acid functionalized core-shell silica coated fe(3)o(4) nanomaterials for magnetic extraction of pb(ii) and cr(vi) ions |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7308298/ https://www.ncbi.nlm.nih.gov/pubmed/32572117 http://dx.doi.org/10.1038/s41598-020-67168-2 |
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