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Superior Heavy Metal Ion Adsorption Capacity in Aqueous Solution by High-Density Thiol-Functionalized Reduced Graphene Oxides
The preparation of mercapto-reduced graphene oxides (m-RGOs) via a solvothermal reaction using P(4)S(10) as a thionating agent has demonstrated their potential as an absorbent for scavenging heavy metal ions, particularly Pb(2+), from aqueous solutions due to the presence of thiol (–SH) functional g...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2023
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10220523/ https://www.ncbi.nlm.nih.gov/pubmed/37241739 http://dx.doi.org/10.3390/molecules28103998 |
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author | Kim, Ho-Geun Bae, Jong-Seong Hwang, Injoo Kim, Sung-Hoon Jeon, Ki-Wan |
author_facet | Kim, Ho-Geun Bae, Jong-Seong Hwang, Injoo Kim, Sung-Hoon Jeon, Ki-Wan |
author_sort | Kim, Ho-Geun |
collection | PubMed |
description | The preparation of mercapto-reduced graphene oxides (m-RGOs) via a solvothermal reaction using P(4)S(10) as a thionating agent has demonstrated their potential as an absorbent for scavenging heavy metal ions, particularly Pb(2+), from aqueous solutions due to the presence of thiol (–SH) functional groups on their surface. The structural and elemental analysis of m-RGOs was conducted using a range of techniques, including X-ray diffraction (XRD), Raman spectroscopy, optical microscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), scanning transmission electron microscopy equipped with energy-dispersive spectroscopy (STEM-EDS), and X-ray photoelectron spectroscopy (XPS). At pH 7 and 25 °C, the maximum adsorption capacity of Pb(2+) ions on the surface of m-RGOs was determined to be approximately 858 mg/g. The heavy metal–S binding energies were used to determine the percent removal of the tested heavy metal ions, with Pb(2+) exhibiting the highest percentage removal, followed by Hg(2+) and Cd(2+) ions having the lowest percent removal, and the binding energies observed were Pb–S at 346 kJ/mol, Hg–S at 217 kJ/mol, and Cd–S at 208 kJ/mol. The time-dependent removal study of Pb(2+) ions also yielded promising results, with almost 98% of Pb(2+) ions being removed within 30 min at pH 7 and 25 °C using a 1 ppm Pb(2+) solution as the test solution. The findings of this study clearly demonstrate the potential and efficiency of thiol-functionalized carbonaceous material for the removal of environmentally harmful Pb(2+) from groundwater. |
format | Online Article Text |
id | pubmed-10220523 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-102205232023-05-28 Superior Heavy Metal Ion Adsorption Capacity in Aqueous Solution by High-Density Thiol-Functionalized Reduced Graphene Oxides Kim, Ho-Geun Bae, Jong-Seong Hwang, Injoo Kim, Sung-Hoon Jeon, Ki-Wan Molecules Article The preparation of mercapto-reduced graphene oxides (m-RGOs) via a solvothermal reaction using P(4)S(10) as a thionating agent has demonstrated their potential as an absorbent for scavenging heavy metal ions, particularly Pb(2+), from aqueous solutions due to the presence of thiol (–SH) functional groups on their surface. The structural and elemental analysis of m-RGOs was conducted using a range of techniques, including X-ray diffraction (XRD), Raman spectroscopy, optical microscopy, scanning electron microscopy (SEM), transmission electron microscopy (TEM), scanning transmission electron microscopy equipped with energy-dispersive spectroscopy (STEM-EDS), and X-ray photoelectron spectroscopy (XPS). At pH 7 and 25 °C, the maximum adsorption capacity of Pb(2+) ions on the surface of m-RGOs was determined to be approximately 858 mg/g. The heavy metal–S binding energies were used to determine the percent removal of the tested heavy metal ions, with Pb(2+) exhibiting the highest percentage removal, followed by Hg(2+) and Cd(2+) ions having the lowest percent removal, and the binding energies observed were Pb–S at 346 kJ/mol, Hg–S at 217 kJ/mol, and Cd–S at 208 kJ/mol. The time-dependent removal study of Pb(2+) ions also yielded promising results, with almost 98% of Pb(2+) ions being removed within 30 min at pH 7 and 25 °C using a 1 ppm Pb(2+) solution as the test solution. The findings of this study clearly demonstrate the potential and efficiency of thiol-functionalized carbonaceous material for the removal of environmentally harmful Pb(2+) from groundwater. MDPI 2023-05-10 /pmc/articles/PMC10220523/ /pubmed/37241739 http://dx.doi.org/10.3390/molecules28103998 Text en © 2023 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Kim, Ho-Geun Bae, Jong-Seong Hwang, Injoo Kim, Sung-Hoon Jeon, Ki-Wan Superior Heavy Metal Ion Adsorption Capacity in Aqueous Solution by High-Density Thiol-Functionalized Reduced Graphene Oxides |
title | Superior Heavy Metal Ion Adsorption Capacity in Aqueous Solution by High-Density Thiol-Functionalized Reduced Graphene Oxides |
title_full | Superior Heavy Metal Ion Adsorption Capacity in Aqueous Solution by High-Density Thiol-Functionalized Reduced Graphene Oxides |
title_fullStr | Superior Heavy Metal Ion Adsorption Capacity in Aqueous Solution by High-Density Thiol-Functionalized Reduced Graphene Oxides |
title_full_unstemmed | Superior Heavy Metal Ion Adsorption Capacity in Aqueous Solution by High-Density Thiol-Functionalized Reduced Graphene Oxides |
title_short | Superior Heavy Metal Ion Adsorption Capacity in Aqueous Solution by High-Density Thiol-Functionalized Reduced Graphene Oxides |
title_sort | superior heavy metal ion adsorption capacity in aqueous solution by high-density thiol-functionalized reduced graphene oxides |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10220523/ https://www.ncbi.nlm.nih.gov/pubmed/37241739 http://dx.doi.org/10.3390/molecules28103998 |
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