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Enhancing Removal of Cr(VI), Pb(2+), and Cu(2+) from Aqueous Solutions Using Amino-Functionalized Cellulose Nanocrystal
In this work, the amino-functionalized cellulose nanocrystal (ACNC) was prepared using a green route and applied as a biosorbent for adsorption of Cr(VI), Pb(2+), and Cu(2+) from aqueous solutions. CNC was firstly oxidized by sodium periodate to yield the dialdehyde nanocellulose (DACNC). Then, DACN...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2021
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8658863/ https://www.ncbi.nlm.nih.gov/pubmed/34885897 http://dx.doi.org/10.3390/molecules26237315 |
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author | Xu, Qinghua Huang, Xiaodi Guo, Lukuan Wang, Yu Jin, Liqiang |
author_facet | Xu, Qinghua Huang, Xiaodi Guo, Lukuan Wang, Yu Jin, Liqiang |
author_sort | Xu, Qinghua |
collection | PubMed |
description | In this work, the amino-functionalized cellulose nanocrystal (ACNC) was prepared using a green route and applied as a biosorbent for adsorption of Cr(VI), Pb(2+), and Cu(2+) from aqueous solutions. CNC was firstly oxidized by sodium periodate to yield the dialdehyde nanocellulose (DACNC). Then, DACNC reacted with diethylenetriamine (DETA) to obtain amino-functionalized nanocellulose (ACNC) through a Schiff base reaction. The properties of DACNC and ACNC were characterized by using elemental analysis, Fourier transform infrared spectroscopy (FT-IR), Kaiser test, atomic force microscopy (AFM), X-ray diffraction (XRD), and zeta potential measurement. The presence of free amino groups was evidenced by the FT-IR results and Kaiser test. ACNCs exhibited an amphoteric nature with isoelectric points between pH 8 and 9. After the chemical modification, the cellulose I polymorph of nanocellulose remained, while the crystallinity decreased. The adsorption behavior of ACNC was investigated for the removal of Cr(VI), Pb(2+), and Cu(2+) in aqueous solutions. The maximum adsorption capacities were obtained at pH 2 for Cr(VI) and pH 6 for Cu(2+) and Pb(2+), respectively. The adsorption all followed pseudo second-order kinetics and Sips adsorption isotherms. The estimated adsorption capacities for Cr(VI), Pb(2+), and Cu(2+) were 70.503, 54.115, and 49.600 mg/g, respectively. |
format | Online Article Text |
id | pubmed-8658863 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2021 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-86588632021-12-10 Enhancing Removal of Cr(VI), Pb(2+), and Cu(2+) from Aqueous Solutions Using Amino-Functionalized Cellulose Nanocrystal Xu, Qinghua Huang, Xiaodi Guo, Lukuan Wang, Yu Jin, Liqiang Molecules Article In this work, the amino-functionalized cellulose nanocrystal (ACNC) was prepared using a green route and applied as a biosorbent for adsorption of Cr(VI), Pb(2+), and Cu(2+) from aqueous solutions. CNC was firstly oxidized by sodium periodate to yield the dialdehyde nanocellulose (DACNC). Then, DACNC reacted with diethylenetriamine (DETA) to obtain amino-functionalized nanocellulose (ACNC) through a Schiff base reaction. The properties of DACNC and ACNC were characterized by using elemental analysis, Fourier transform infrared spectroscopy (FT-IR), Kaiser test, atomic force microscopy (AFM), X-ray diffraction (XRD), and zeta potential measurement. The presence of free amino groups was evidenced by the FT-IR results and Kaiser test. ACNCs exhibited an amphoteric nature with isoelectric points between pH 8 and 9. After the chemical modification, the cellulose I polymorph of nanocellulose remained, while the crystallinity decreased. The adsorption behavior of ACNC was investigated for the removal of Cr(VI), Pb(2+), and Cu(2+) in aqueous solutions. The maximum adsorption capacities were obtained at pH 2 for Cr(VI) and pH 6 for Cu(2+) and Pb(2+), respectively. The adsorption all followed pseudo second-order kinetics and Sips adsorption isotherms. The estimated adsorption capacities for Cr(VI), Pb(2+), and Cu(2+) were 70.503, 54.115, and 49.600 mg/g, respectively. MDPI 2021-12-02 /pmc/articles/PMC8658863/ /pubmed/34885897 http://dx.doi.org/10.3390/molecules26237315 Text en © 2021 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 Xu, Qinghua Huang, Xiaodi Guo, Lukuan Wang, Yu Jin, Liqiang Enhancing Removal of Cr(VI), Pb(2+), and Cu(2+) from Aqueous Solutions Using Amino-Functionalized Cellulose Nanocrystal |
title | Enhancing Removal of Cr(VI), Pb(2+), and Cu(2+) from Aqueous Solutions Using Amino-Functionalized Cellulose Nanocrystal |
title_full | Enhancing Removal of Cr(VI), Pb(2+), and Cu(2+) from Aqueous Solutions Using Amino-Functionalized Cellulose Nanocrystal |
title_fullStr | Enhancing Removal of Cr(VI), Pb(2+), and Cu(2+) from Aqueous Solutions Using Amino-Functionalized Cellulose Nanocrystal |
title_full_unstemmed | Enhancing Removal of Cr(VI), Pb(2+), and Cu(2+) from Aqueous Solutions Using Amino-Functionalized Cellulose Nanocrystal |
title_short | Enhancing Removal of Cr(VI), Pb(2+), and Cu(2+) from Aqueous Solutions Using Amino-Functionalized Cellulose Nanocrystal |
title_sort | enhancing removal of cr(vi), pb(2+), and cu(2+) from aqueous solutions using amino-functionalized cellulose nanocrystal |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8658863/ https://www.ncbi.nlm.nih.gov/pubmed/34885897 http://dx.doi.org/10.3390/molecules26237315 |
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