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Functionalized biochar-supported magnetic MnFe(2)O(4) nanocomposite for the removal of Pb(ii) and Cd(ii)

In this study, a novel magnetic biochar-MnFe(2)O(4) nanocomposite (BC/FM) was prepared using low-cost corn straw and MnFe(2)O(4) by sol–gel/pyrolyzing route using egg white, which has abundant functional groups (–NH(2) and –COOH). Following that, its composition, morphology and structure was charact...

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Detalles Bibliográficos
Autores principales: Zhang, Lianke, Guo, Jinyue, Huang, Xuemin, Wang, Weida, Sun, Peng, Li, Yumei, Han, Jianhong
Formato: Online Artículo Texto
Lenguaje:English
Publicado: The Royal Society of Chemistry 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9059321/
https://www.ncbi.nlm.nih.gov/pubmed/35521601
http://dx.doi.org/10.1039/c8ra09061k
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author Zhang, Lianke
Guo, Jinyue
Huang, Xuemin
Wang, Weida
Sun, Peng
Li, Yumei
Han, Jianhong
author_facet Zhang, Lianke
Guo, Jinyue
Huang, Xuemin
Wang, Weida
Sun, Peng
Li, Yumei
Han, Jianhong
author_sort Zhang, Lianke
collection PubMed
description In this study, a novel magnetic biochar-MnFe(2)O(4) nanocomposite (BC/FM) was prepared using low-cost corn straw and MnFe(2)O(4) by sol–gel/pyrolyzing route using egg white, which has abundant functional groups (–NH(2) and –COOH). Following that, its composition, morphology and structure was characterized by various techniques including SEM-EDX, BET, XRD, and VSM. Batch experiment of the adsorption for Pb(ii) and Cd(ii) including influence of pH, kinetics, isotherm and thermodynamics was also studied. The results demonstrated that biochar could effectively support MnFe(2)O(4), which displayed high dispersion on the surface of the biochar and possessed abundant functional groups and high surface area contributing to superior performance on Pb(ii) and Cd(ii) removal. Therein, MnFe(2)O(4) with high magnetism is convenient for separating the magnetic BC/FM from an aqueous medium. Adsorption experiment results indicate that Pb(ii) and Cd(ii) removal by BC/FM was closely related to pH with the best value of pH 5.0, and the process reached equilibrium in 2 h. The adsorption process is well-described by the pseudo-second-order kinetic model and Sips (Freundlich–Langmuir) model. Thermodynamic studies suggest that the adsorption process is spontaneous and exothermic. The maximum experimental adsorption capacity of BC/FM is 154.94 and 127.83 mg g(−1) for Pb(ii) and Cd(ii), respectively, in single-solute system, which is higher than that of some of the other adsorbents of biochar or biochar-based composites. In bi-solute system, the preferential adsorption order of BC/FM for the two metals is Pb(ii) prior to Cd(ii). Finally, FTIR and XPS analysis verified that the main mechanism of Pb(ii) and Cd(ii) removal by BC/FM is by forming Pb/Cd–O or complexation of carboxyl and hydroxyl and ion exchange. Therefore, the prepared magnetic BC/FM composite, as an excellent adsorbent, exhibited potential applications for the removal of Pb(ii) and Cd(ii) from wastewater.
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spelling pubmed-90593212022-05-04 Functionalized biochar-supported magnetic MnFe(2)O(4) nanocomposite for the removal of Pb(ii) and Cd(ii) Zhang, Lianke Guo, Jinyue Huang, Xuemin Wang, Weida Sun, Peng Li, Yumei Han, Jianhong RSC Adv Chemistry In this study, a novel magnetic biochar-MnFe(2)O(4) nanocomposite (BC/FM) was prepared using low-cost corn straw and MnFe(2)O(4) by sol–gel/pyrolyzing route using egg white, which has abundant functional groups (–NH(2) and –COOH). Following that, its composition, morphology and structure was characterized by various techniques including SEM-EDX, BET, XRD, and VSM. Batch experiment of the adsorption for Pb(ii) and Cd(ii) including influence of pH, kinetics, isotherm and thermodynamics was also studied. The results demonstrated that biochar could effectively support MnFe(2)O(4), which displayed high dispersion on the surface of the biochar and possessed abundant functional groups and high surface area contributing to superior performance on Pb(ii) and Cd(ii) removal. Therein, MnFe(2)O(4) with high magnetism is convenient for separating the magnetic BC/FM from an aqueous medium. Adsorption experiment results indicate that Pb(ii) and Cd(ii) removal by BC/FM was closely related to pH with the best value of pH 5.0, and the process reached equilibrium in 2 h. The adsorption process is well-described by the pseudo-second-order kinetic model and Sips (Freundlich–Langmuir) model. Thermodynamic studies suggest that the adsorption process is spontaneous and exothermic. The maximum experimental adsorption capacity of BC/FM is 154.94 and 127.83 mg g(−1) for Pb(ii) and Cd(ii), respectively, in single-solute system, which is higher than that of some of the other adsorbents of biochar or biochar-based composites. In bi-solute system, the preferential adsorption order of BC/FM for the two metals is Pb(ii) prior to Cd(ii). Finally, FTIR and XPS analysis verified that the main mechanism of Pb(ii) and Cd(ii) removal by BC/FM is by forming Pb/Cd–O or complexation of carboxyl and hydroxyl and ion exchange. Therefore, the prepared magnetic BC/FM composite, as an excellent adsorbent, exhibited potential applications for the removal of Pb(ii) and Cd(ii) from wastewater. The Royal Society of Chemistry 2019-01-02 /pmc/articles/PMC9059321/ /pubmed/35521601 http://dx.doi.org/10.1039/c8ra09061k Text en This journal is © The Royal Society of Chemistry https://creativecommons.org/licenses/by/3.0/
spellingShingle Chemistry
Zhang, Lianke
Guo, Jinyue
Huang, Xuemin
Wang, Weida
Sun, Peng
Li, Yumei
Han, Jianhong
Functionalized biochar-supported magnetic MnFe(2)O(4) nanocomposite for the removal of Pb(ii) and Cd(ii)
title Functionalized biochar-supported magnetic MnFe(2)O(4) nanocomposite for the removal of Pb(ii) and Cd(ii)
title_full Functionalized biochar-supported magnetic MnFe(2)O(4) nanocomposite for the removal of Pb(ii) and Cd(ii)
title_fullStr Functionalized biochar-supported magnetic MnFe(2)O(4) nanocomposite for the removal of Pb(ii) and Cd(ii)
title_full_unstemmed Functionalized biochar-supported magnetic MnFe(2)O(4) nanocomposite for the removal of Pb(ii) and Cd(ii)
title_short Functionalized biochar-supported magnetic MnFe(2)O(4) nanocomposite for the removal of Pb(ii) and Cd(ii)
title_sort functionalized biochar-supported magnetic mnfe(2)o(4) nanocomposite for the removal of pb(ii) and cd(ii)
topic Chemistry
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9059321/
https://www.ncbi.nlm.nih.gov/pubmed/35521601
http://dx.doi.org/10.1039/c8ra09061k
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