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Adsorption of Polyelectrolyte onto Nanosilica Synthesized from Rice Husk: Characteristics, Mechanisms, and Application for Antibiotic Removal

Adsorption of the polyelectrolyte polydiallyldimethylammonium chloride (PDADMAC) onto nanosilica (SiO(2)) fabricated from rice husk was studied in this work. Nanosilica was characterized by X-ray diffraction, Fourier-transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). Ads...

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Autores principales: Pham, Tien Duc, Bui, Thu Thuy, Nguyen, Van Thanh, Bui, Thi Kieu Van, Tran, Thi Thuy, Phan, Quynh Chi, Pham, Tien Dat, Hoang, Thu Ha
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6415144/
https://www.ncbi.nlm.nih.gov/pubmed/30966256
http://dx.doi.org/10.3390/polym10020220
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author Pham, Tien Duc
Bui, Thu Thuy
Nguyen, Van Thanh
Bui, Thi Kieu Van
Tran, Thi Thuy
Phan, Quynh Chi
Pham, Tien Dat
Hoang, Thu Ha
author_facet Pham, Tien Duc
Bui, Thu Thuy
Nguyen, Van Thanh
Bui, Thi Kieu Van
Tran, Thi Thuy
Phan, Quynh Chi
Pham, Tien Dat
Hoang, Thu Ha
author_sort Pham, Tien Duc
collection PubMed
description Adsorption of the polyelectrolyte polydiallyldimethylammonium chloride (PDADMAC) onto nanosilica (SiO(2)) fabricated from rice husk was studied in this work. Nanosilica was characterized by X-ray diffraction, Fourier-transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). Adsorption of PDADMAC onto SiO(2) increased with increasing pH because the negative charge of SiO(2) is higher at high pH. Adsorption isotherms of PDADMAC onto silica at different KCl concentrations were fitted well by a two-step adsorption model. Adsorption mechanisms of PDADMAC onto SiO(2) are discussed on the basis of surface charge change, evaluation by ζ potential, surface modification by FTIR measurements, and the adsorption isotherm. The application of PDADMAC adsorption onto SiO(2) to remove amoxicillin antibiotic (AMX) was also studied. Experimental conditions such as contact time, pH, and adsorbent dosage for removal of AMX using SiO(2) modified with PDADMAC were systematically optimized and found to be 180 min, pH 10, and 10 mg/mL, respectively. The removal efficiency of AMX using PDADMAC-modified SiO(2) increased significantly from 19.1% to 92.3% under optimum adsorptive conditions. We indicate that PDADMAC-modified SiO(2) rice husk is a novel adsorbent for removal of antibiotics from aqueous solution.
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spelling pubmed-64151442019-04-02 Adsorption of Polyelectrolyte onto Nanosilica Synthesized from Rice Husk: Characteristics, Mechanisms, and Application for Antibiotic Removal Pham, Tien Duc Bui, Thu Thuy Nguyen, Van Thanh Bui, Thi Kieu Van Tran, Thi Thuy Phan, Quynh Chi Pham, Tien Dat Hoang, Thu Ha Polymers (Basel) Article Adsorption of the polyelectrolyte polydiallyldimethylammonium chloride (PDADMAC) onto nanosilica (SiO(2)) fabricated from rice husk was studied in this work. Nanosilica was characterized by X-ray diffraction, Fourier-transform infrared spectroscopy (FTIR), and scanning electron microscopy (SEM). Adsorption of PDADMAC onto SiO(2) increased with increasing pH because the negative charge of SiO(2) is higher at high pH. Adsorption isotherms of PDADMAC onto silica at different KCl concentrations were fitted well by a two-step adsorption model. Adsorption mechanisms of PDADMAC onto SiO(2) are discussed on the basis of surface charge change, evaluation by ζ potential, surface modification by FTIR measurements, and the adsorption isotherm. The application of PDADMAC adsorption onto SiO(2) to remove amoxicillin antibiotic (AMX) was also studied. Experimental conditions such as contact time, pH, and adsorbent dosage for removal of AMX using SiO(2) modified with PDADMAC were systematically optimized and found to be 180 min, pH 10, and 10 mg/mL, respectively. The removal efficiency of AMX using PDADMAC-modified SiO(2) increased significantly from 19.1% to 92.3% under optimum adsorptive conditions. We indicate that PDADMAC-modified SiO(2) rice husk is a novel adsorbent for removal of antibiotics from aqueous solution. MDPI 2018-02-23 /pmc/articles/PMC6415144/ /pubmed/30966256 http://dx.doi.org/10.3390/polym10020220 Text en © 2018 by the authors. 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 (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Pham, Tien Duc
Bui, Thu Thuy
Nguyen, Van Thanh
Bui, Thi Kieu Van
Tran, Thi Thuy
Phan, Quynh Chi
Pham, Tien Dat
Hoang, Thu Ha
Adsorption of Polyelectrolyte onto Nanosilica Synthesized from Rice Husk: Characteristics, Mechanisms, and Application for Antibiotic Removal
title Adsorption of Polyelectrolyte onto Nanosilica Synthesized from Rice Husk: Characteristics, Mechanisms, and Application for Antibiotic Removal
title_full Adsorption of Polyelectrolyte onto Nanosilica Synthesized from Rice Husk: Characteristics, Mechanisms, and Application for Antibiotic Removal
title_fullStr Adsorption of Polyelectrolyte onto Nanosilica Synthesized from Rice Husk: Characteristics, Mechanisms, and Application for Antibiotic Removal
title_full_unstemmed Adsorption of Polyelectrolyte onto Nanosilica Synthesized from Rice Husk: Characteristics, Mechanisms, and Application for Antibiotic Removal
title_short Adsorption of Polyelectrolyte onto Nanosilica Synthesized from Rice Husk: Characteristics, Mechanisms, and Application for Antibiotic Removal
title_sort adsorption of polyelectrolyte onto nanosilica synthesized from rice husk: characteristics, mechanisms, and application for antibiotic removal
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6415144/
https://www.ncbi.nlm.nih.gov/pubmed/30966256
http://dx.doi.org/10.3390/polym10020220
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