Study on the Removal Efficiency and Mechanism of Tetracycline in Water Using Biochar and Magnetic Biochar

In this study, a new type of sludge-derived biochar material with high tetracycline removal efficiency, named magnetic Fe<sub>3</sub>O<sub>4</sub> biochar, was accomplished by KOH activated and loaded with magnetic Fe<sub>3</sub>O<sub>4</sub>. The part...

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Autores principales: Hongwei Sun, Jingjie Yang, Yue Wang, Yucan Liu, Chenjian Cai, Afshin Davarpanah
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spelling oai:doaj.org-article:65b6ed5b51dc4c05b52f8f8ca42bab222021-11-25T17:16:24ZStudy on the Removal Efficiency and Mechanism of Tetracycline in Water Using Biochar and Magnetic Biochar10.3390/coatings111113542079-6412https://doaj.org/article/65b6ed5b51dc4c05b52f8f8ca42bab222021-11-01T00:00:00Zhttps://www.mdpi.com/2079-6412/11/11/1354https://doaj.org/toc/2079-6412In this study, a new type of sludge-derived biochar material with high tetracycline removal efficiency, named magnetic Fe<sub>3</sub>O<sub>4</sub> biochar, was accomplished by KOH activated and loaded with magnetic Fe<sub>3</sub>O<sub>4</sub>. The particles with spherical pellets observed by SEM, as well as the XRD patterns, indicated that magnetic Fe<sub>3</sub>O<sub>4</sub> nanoparticles were successfully loaded onto the biochar. We studied the adsorption effects and mechanisms of the following three different adsorption materials for tetracycline: biochar (BC), magnetic Fe<sub>3</sub>O<sub>4</sub>, and magnetic biochar (MBC), and the loading conditions and reusability of the materials were also considered. The adsorption effects were as follows: Fe<sub>3</sub>O<sub>4</sub> (94.3%) > MBC (88.3%) > BC (65.7%), and the ratio of biochar to ferric salt was 0.2:1; the removal effect reached the best result. Under an acidic condition, the adsorption capacity of all the materials reached the maximum, and the adsorption of tetracycline in water, by three adsorbents, involves chemical adsorption as the leading process and physical adsorption as the auxiliary process. Various characterizations indicated the removal of tetracycline, including pore filling, electrostatic interaction, hydrogen bond action, and cationic-π action. Complex bridging is a unique adsorption mechanism of magnetic Fe<sub>3</sub>O<sub>4</sub> and magnetic biochar. In addition, the magnetic biochar also possesses π–π bond interaction. The magnetic materials can still maintain a certain amount of adsorption capacity on tetracycline after five cycles. This study proved that the magnetic sludge-based biochar are ideal adsorbents for the removal of tetracycline from water, as well as an effective route for the reclamation of waste sludge.Hongwei SunJingjie YangYue WangYucan LiuChenjian CaiAfshin DavarpanahMDPI AGarticleadsorption mechanismmagnetic Fe<sub>3</sub>O<sub>4</sub>sludge-derived biochartetracyclineEngineering (General). Civil engineering (General)TA1-2040ENCoatings, Vol 11, Iss 1354, p 1354 (2021)
institution DOAJ
collection DOAJ
language EN
topic adsorption mechanism
magnetic Fe<sub>3</sub>O<sub>4</sub>
sludge-derived biochar
tetracycline
Engineering (General). Civil engineering (General)
TA1-2040
spellingShingle adsorption mechanism
magnetic Fe<sub>3</sub>O<sub>4</sub>
sludge-derived biochar
tetracycline
Engineering (General). Civil engineering (General)
TA1-2040
Hongwei Sun
Jingjie Yang
Yue Wang
Yucan Liu
Chenjian Cai
Afshin Davarpanah
Study on the Removal Efficiency and Mechanism of Tetracycline in Water Using Biochar and Magnetic Biochar
description In this study, a new type of sludge-derived biochar material with high tetracycline removal efficiency, named magnetic Fe<sub>3</sub>O<sub>4</sub> biochar, was accomplished by KOH activated and loaded with magnetic Fe<sub>3</sub>O<sub>4</sub>. The particles with spherical pellets observed by SEM, as well as the XRD patterns, indicated that magnetic Fe<sub>3</sub>O<sub>4</sub> nanoparticles were successfully loaded onto the biochar. We studied the adsorption effects and mechanisms of the following three different adsorption materials for tetracycline: biochar (BC), magnetic Fe<sub>3</sub>O<sub>4</sub>, and magnetic biochar (MBC), and the loading conditions and reusability of the materials were also considered. The adsorption effects were as follows: Fe<sub>3</sub>O<sub>4</sub> (94.3%) > MBC (88.3%) > BC (65.7%), and the ratio of biochar to ferric salt was 0.2:1; the removal effect reached the best result. Under an acidic condition, the adsorption capacity of all the materials reached the maximum, and the adsorption of tetracycline in water, by three adsorbents, involves chemical adsorption as the leading process and physical adsorption as the auxiliary process. Various characterizations indicated the removal of tetracycline, including pore filling, electrostatic interaction, hydrogen bond action, and cationic-π action. Complex bridging is a unique adsorption mechanism of magnetic Fe<sub>3</sub>O<sub>4</sub> and magnetic biochar. In addition, the magnetic biochar also possesses π–π bond interaction. The magnetic materials can still maintain a certain amount of adsorption capacity on tetracycline after five cycles. This study proved that the magnetic sludge-based biochar are ideal adsorbents for the removal of tetracycline from water, as well as an effective route for the reclamation of waste sludge.
format article
author Hongwei Sun
Jingjie Yang
Yue Wang
Yucan Liu
Chenjian Cai
Afshin Davarpanah
author_facet Hongwei Sun
Jingjie Yang
Yue Wang
Yucan Liu
Chenjian Cai
Afshin Davarpanah
author_sort Hongwei Sun
title Study on the Removal Efficiency and Mechanism of Tetracycline in Water Using Biochar and Magnetic Biochar
title_short Study on the Removal Efficiency and Mechanism of Tetracycline in Water Using Biochar and Magnetic Biochar
title_full Study on the Removal Efficiency and Mechanism of Tetracycline in Water Using Biochar and Magnetic Biochar
title_fullStr Study on the Removal Efficiency and Mechanism of Tetracycline in Water Using Biochar and Magnetic Biochar
title_full_unstemmed Study on the Removal Efficiency and Mechanism of Tetracycline in Water Using Biochar and Magnetic Biochar
title_sort study on the removal efficiency and mechanism of tetracycline in water using biochar and magnetic biochar
publisher MDPI AG
publishDate 2021
url https://doaj.org/article/65b6ed5b51dc4c05b52f8f8ca42bab22
work_keys_str_mv AT hongweisun studyontheremovalefficiencyandmechanismoftetracyclineinwaterusingbiocharandmagneticbiochar
AT jingjieyang studyontheremovalefficiencyandmechanismoftetracyclineinwaterusingbiocharandmagneticbiochar
AT yuewang studyontheremovalefficiencyandmechanismoftetracyclineinwaterusingbiocharandmagneticbiochar
AT yucanliu studyontheremovalefficiencyandmechanismoftetracyclineinwaterusingbiocharandmagneticbiochar
AT chenjiancai studyontheremovalefficiencyandmechanismoftetracyclineinwaterusingbiocharandmagneticbiochar
AT afshindavarpanah studyontheremovalefficiencyandmechanismoftetracyclineinwaterusingbiocharandmagneticbiochar
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