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Adsorption behavior of biochar pyrolyzed from barracuda grass for cadmium ions
This work investigated the removal of cadmium ions (Cd(2+)) by using biochar derived from Barracuda Grass. The biochars derived from the pyrolysis of roots (BGR), stems (BGS) and leaves (BGL) were characterized and their performance for cadmium adsorption was studied at varying parameters of tempera...
Autores principales: | , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Frontiers Media S.A.
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9429091/ https://www.ncbi.nlm.nih.gov/pubmed/36059874 http://dx.doi.org/10.3389/fchem.2022.971540 |
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author | Shao, Yan Chen, Zhiliang Zhang, Zhonglei Pang, Jun Li, Yinyin Zhu, Jia Zhang, Gen Wang, Xiaoshu Chang, Ming Wang, Lei |
author_facet | Shao, Yan Chen, Zhiliang Zhang, Zhonglei Pang, Jun Li, Yinyin Zhu, Jia Zhang, Gen Wang, Xiaoshu Chang, Ming Wang, Lei |
author_sort | Shao, Yan |
collection | PubMed |
description | This work investigated the removal of cadmium ions (Cd(2+)) by using biochar derived from Barracuda Grass. The biochars derived from the pyrolysis of roots (BGR), stems (BGS) and leaves (BGL) were characterized and their performance for cadmium adsorption was studied at varying parameters of temperature, time, and alkali (earth) metal concentrations. The maximum adsorption amount at equilibrium of BGR, BGS and BGL was determined experimentally as 8.38 mg/g, 42.12 mg/g, and 30.39 mg/g. Adsorption fitting results revealed that Cd2+ adsorbed on BGR and BGS preferred to be multilayer-covered, and BGL was more likely to have monolayer-covered functions. The kinetic data fitted well to the pseudo-second-order model (R (2) > 0.99), revealing the adsorption process was a spontaneous monolayer chemisorption process. The results of alkaline (earth) metals leaching of biochar revealed that the inherent alkaline (earth) metals in biochar made inhibitory functions on the Cd(2+) adsorption behavior by occupying the active sites. And in the process of wastewater treatment, the leaching of alkaline earth metals might enhance the complexation reaction between surface groups and Cd(2+). This study provides a feasible strategy for the resource utilization of abundant hydrophytic plants in waste management. |
format | Online Article Text |
id | pubmed-9429091 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
spelling | pubmed-94290912022-09-01 Adsorption behavior of biochar pyrolyzed from barracuda grass for cadmium ions Shao, Yan Chen, Zhiliang Zhang, Zhonglei Pang, Jun Li, Yinyin Zhu, Jia Zhang, Gen Wang, Xiaoshu Chang, Ming Wang, Lei Front Chem Chemistry This work investigated the removal of cadmium ions (Cd(2+)) by using biochar derived from Barracuda Grass. The biochars derived from the pyrolysis of roots (BGR), stems (BGS) and leaves (BGL) were characterized and their performance for cadmium adsorption was studied at varying parameters of temperature, time, and alkali (earth) metal concentrations. The maximum adsorption amount at equilibrium of BGR, BGS and BGL was determined experimentally as 8.38 mg/g, 42.12 mg/g, and 30.39 mg/g. Adsorption fitting results revealed that Cd2+ adsorbed on BGR and BGS preferred to be multilayer-covered, and BGL was more likely to have monolayer-covered functions. The kinetic data fitted well to the pseudo-second-order model (R (2) > 0.99), revealing the adsorption process was a spontaneous monolayer chemisorption process. The results of alkaline (earth) metals leaching of biochar revealed that the inherent alkaline (earth) metals in biochar made inhibitory functions on the Cd(2+) adsorption behavior by occupying the active sites. And in the process of wastewater treatment, the leaching of alkaline earth metals might enhance the complexation reaction between surface groups and Cd(2+). This study provides a feasible strategy for the resource utilization of abundant hydrophytic plants in waste management. Frontiers Media S.A. 2022-08-17 /pmc/articles/PMC9429091/ /pubmed/36059874 http://dx.doi.org/10.3389/fchem.2022.971540 Text en Copyright © 2022 Shao, Chen, Zhang, Pang, Li, Zhu, Zhang, Wang, Chang and Wang. https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
spellingShingle | Chemistry Shao, Yan Chen, Zhiliang Zhang, Zhonglei Pang, Jun Li, Yinyin Zhu, Jia Zhang, Gen Wang, Xiaoshu Chang, Ming Wang, Lei Adsorption behavior of biochar pyrolyzed from barracuda grass for cadmium ions |
title | Adsorption behavior of biochar pyrolyzed from barracuda grass for cadmium ions |
title_full | Adsorption behavior of biochar pyrolyzed from barracuda grass for cadmium ions |
title_fullStr | Adsorption behavior of biochar pyrolyzed from barracuda grass for cadmium ions |
title_full_unstemmed | Adsorption behavior of biochar pyrolyzed from barracuda grass for cadmium ions |
title_short | Adsorption behavior of biochar pyrolyzed from barracuda grass for cadmium ions |
title_sort | adsorption behavior of biochar pyrolyzed from barracuda grass for cadmium ions |
topic | Chemistry |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9429091/ https://www.ncbi.nlm.nih.gov/pubmed/36059874 http://dx.doi.org/10.3389/fchem.2022.971540 |
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