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Adsorption Characteristics and Mechanism of Bisphenol A by Magnetic Biochar

In this paper, biochar (BC) was prepared from discarded grapefruit peel and modified to prepare magnetic biochar (MBC). Physical and chemical properties of BC and MBC were characterized, and the results showed that the type of iron oxide loaded by MBC was γ-Fe(2)O(3). Compared with BC, MBC has a lar...

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Autores principales: Wang, Jinpeng, Zhang, Ming
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7037948/
https://www.ncbi.nlm.nih.gov/pubmed/32046258
http://dx.doi.org/10.3390/ijerph17031075
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author Wang, Jinpeng
Zhang, Ming
author_facet Wang, Jinpeng
Zhang, Ming
author_sort Wang, Jinpeng
collection PubMed
description In this paper, biochar (BC) was prepared from discarded grapefruit peel and modified to prepare magnetic biochar (MBC). Physical and chemical properties of BC and MBC were characterized, and the results showed that the type of iron oxide loaded by MBC was γ-Fe(2)O(3). Compared with BC, MBC has a larger specific surface area and pore volume, with more oxygen-containing functional groups on the surface. BC and MBC were used to adsorb and remove endocrine-disrupting chemical (EDC) bisphenol A (BPA) from simulated wastewater. The results showed that the adsorption kinetics and adsorption isotherm of BPA adsorption by BC and MBC were mainly in accordance with the pseudo-second-order kinetics model and the Langmuir model. This indicates that the adsorption of BPA on BC and MBC is mainly a chemically controlled monolayer adsorption. Adsorption thermodynamics show that BC and MBC adsorption of BPA is a spontaneous exothermic reaction, and lowering the temperature is conducive to the adsorption reaction. The effect of solution pH on the adsorption of BPA by both was significant. The optimum pH for BC and MBC to absorb BPA was 6 and 3, respectively. The concentration of Na(+) in the range of 0–0.10 mol·L(−1) can promote the adsorption of BPA to MBC. MBC loaded with γ-Fe(2)O(3) not only has excellent magnetic separation ability, but can also reach about 80% of the initial adsorption capacity after four cycles of adsorption. By analyzing the adsorption mechanism, it was found that the H-bond and the π–π electron donor–acceptor interaction (EDA) were the main forces for BC and MBC to adsorb BPA.
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spelling pubmed-70379482020-03-10 Adsorption Characteristics and Mechanism of Bisphenol A by Magnetic Biochar Wang, Jinpeng Zhang, Ming Int J Environ Res Public Health Article In this paper, biochar (BC) was prepared from discarded grapefruit peel and modified to prepare magnetic biochar (MBC). Physical and chemical properties of BC and MBC were characterized, and the results showed that the type of iron oxide loaded by MBC was γ-Fe(2)O(3). Compared with BC, MBC has a larger specific surface area and pore volume, with more oxygen-containing functional groups on the surface. BC and MBC were used to adsorb and remove endocrine-disrupting chemical (EDC) bisphenol A (BPA) from simulated wastewater. The results showed that the adsorption kinetics and adsorption isotherm of BPA adsorption by BC and MBC were mainly in accordance with the pseudo-second-order kinetics model and the Langmuir model. This indicates that the adsorption of BPA on BC and MBC is mainly a chemically controlled monolayer adsorption. Adsorption thermodynamics show that BC and MBC adsorption of BPA is a spontaneous exothermic reaction, and lowering the temperature is conducive to the adsorption reaction. The effect of solution pH on the adsorption of BPA by both was significant. The optimum pH for BC and MBC to absorb BPA was 6 and 3, respectively. The concentration of Na(+) in the range of 0–0.10 mol·L(−1) can promote the adsorption of BPA to MBC. MBC loaded with γ-Fe(2)O(3) not only has excellent magnetic separation ability, but can also reach about 80% of the initial adsorption capacity after four cycles of adsorption. By analyzing the adsorption mechanism, it was found that the H-bond and the π–π electron donor–acceptor interaction (EDA) were the main forces for BC and MBC to adsorb BPA. MDPI 2020-02-08 2020-02 /pmc/articles/PMC7037948/ /pubmed/32046258 http://dx.doi.org/10.3390/ijerph17031075 Text en © 2020 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
Wang, Jinpeng
Zhang, Ming
Adsorption Characteristics and Mechanism of Bisphenol A by Magnetic Biochar
title Adsorption Characteristics and Mechanism of Bisphenol A by Magnetic Biochar
title_full Adsorption Characteristics and Mechanism of Bisphenol A by Magnetic Biochar
title_fullStr Adsorption Characteristics and Mechanism of Bisphenol A by Magnetic Biochar
title_full_unstemmed Adsorption Characteristics and Mechanism of Bisphenol A by Magnetic Biochar
title_short Adsorption Characteristics and Mechanism of Bisphenol A by Magnetic Biochar
title_sort adsorption characteristics and mechanism of bisphenol a by magnetic biochar
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7037948/
https://www.ncbi.nlm.nih.gov/pubmed/32046258
http://dx.doi.org/10.3390/ijerph17031075
work_keys_str_mv AT wangjinpeng adsorptioncharacteristicsandmechanismofbisphenolabymagneticbiochar
AT zhangming adsorptioncharacteristicsandmechanismofbisphenolabymagneticbiochar