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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2021
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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) |
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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 |
_version_ |
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