Ball milled Mg/Al hydroxides modified nitrogen-rich biochar for arsenic removal: performance and governing mechanism
Abstract Layered double hydroxides (LDHs) are widely used as effective adsorbents for wastewater treatment due to their simple synthesis, controllable structure, strong stability, large surface area, and large interfacial spacing. In this study, modified-biochar (BMBC) and Mg/Al modified-biochar com...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Springer
2023-08-01
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| Series: | Carbon Research |
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| Online Access: | https://doi.org/10.1007/s44246-023-00063-3 |
| _version_ | 1797556100589944832 |
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| author | Ming Wang Jinlong Yan Yusen Diao Xiangqian Zhou Ting Luo Hui Wang Guixiang Quan Xinyu Sun Jun Wang |
| author_facet | Ming Wang Jinlong Yan Yusen Diao Xiangqian Zhou Ting Luo Hui Wang Guixiang Quan Xinyu Sun Jun Wang |
| author_sort | Ming Wang |
| collection | DOAJ |
| description | Abstract Layered double hydroxides (LDHs) are widely used as effective adsorbents for wastewater treatment due to their simple synthesis, controllable structure, strong stability, large surface area, and large interfacial spacing. In this study, modified-biochar (BMBC) and Mg/Al modified-biochar composite (Mg/Al-BC) were directly prepared using ball milling technology to effectively adsorb As(V), and nitrogen-rich biochar was obtained through pyrolysis using shrimp shells as precursors. Compared to pristine biochar, the oxygen-containing functional groups of Mg/Al-BC increased by 71.9%, and the particle average diameter decreased from 14.26 nm to 12.56 nm. The kinetics and isothermal models of arsenic adsorption were examined in batch experiments to investigate the impacts of pH, temperature, and co-existing anions. The adsorption capacities for As(V) followed the order: Mg/Al-BC > BMBC > BC, with their respective maximum adsorption capacities measured at 22.65, 6.73, and 0.48 mg/g. The arsenic adsorbed onto Mg/Al-BC was dependent on pH and coexisting anions. Precipitation, ion exchange, surface complexation, and electrostatic interaction were the possible governing adsorption mechanisms. Protonation of pyridinic-N/quinone groups in biochar contributed to the electrostatic attraction between arsenic anion and quaternary ammonium cation. Stable reusability indicates that the ball milled Mg/Al-BC composite could be a promising adsorbent for arsenate removal from polluted water. Graphical Abstract |
| first_indexed | 2024-03-10T16:56:57Z |
| format | Article |
| id | doaj.art-7b7b8339f84447248de6f75f6418837e |
| institution | Directory Open Access Journal |
| issn | 2731-6696 |
| language | English |
| last_indexed | 2024-03-10T16:56:57Z |
| publishDate | 2023-08-01 |
| publisher | Springer |
| record_format | Article |
| series | Carbon Research |
| spelling | doaj.art-7b7b8339f84447248de6f75f6418837e2023-11-20T11:05:36ZengSpringerCarbon Research2731-66962023-08-012111410.1007/s44246-023-00063-3Ball milled Mg/Al hydroxides modified nitrogen-rich biochar for arsenic removal: performance and governing mechanismMing Wang0Jinlong Yan1Yusen Diao2Xiangqian Zhou3Ting Luo4Hui Wang5Guixiang Quan6Xinyu Sun7Jun Wang8School of Environmental Science and Engineering, Yancheng Institute of TechnologySchool of Environmental Science and Engineering, Yancheng Institute of TechnologySchool of Environmental Science and Engineering, Yancheng Institute of TechnologySchool of Environmental Science and Engineering, Yancheng Institute of TechnologySchool of Environmental Science and Engineering, Yancheng Institute of TechnologySchool of Environmental Science and Engineering, Yancheng Institute of TechnologySchool of Environmental Science and Engineering, Yancheng Institute of TechnologySchool of Environmental Science and Engineering, Yancheng Institute of TechnologySchool of Environmental Science and Engineering, Yancheng Institute of TechnologyAbstract Layered double hydroxides (LDHs) are widely used as effective adsorbents for wastewater treatment due to their simple synthesis, controllable structure, strong stability, large surface area, and large interfacial spacing. In this study, modified-biochar (BMBC) and Mg/Al modified-biochar composite (Mg/Al-BC) were directly prepared using ball milling technology to effectively adsorb As(V), and nitrogen-rich biochar was obtained through pyrolysis using shrimp shells as precursors. Compared to pristine biochar, the oxygen-containing functional groups of Mg/Al-BC increased by 71.9%, and the particle average diameter decreased from 14.26 nm to 12.56 nm. The kinetics and isothermal models of arsenic adsorption were examined in batch experiments to investigate the impacts of pH, temperature, and co-existing anions. The adsorption capacities for As(V) followed the order: Mg/Al-BC > BMBC > BC, with their respective maximum adsorption capacities measured at 22.65, 6.73, and 0.48 mg/g. The arsenic adsorbed onto Mg/Al-BC was dependent on pH and coexisting anions. Precipitation, ion exchange, surface complexation, and electrostatic interaction were the possible governing adsorption mechanisms. Protonation of pyridinic-N/quinone groups in biochar contributed to the electrostatic attraction between arsenic anion and quaternary ammonium cation. Stable reusability indicates that the ball milled Mg/Al-BC composite could be a promising adsorbent for arsenate removal from polluted water. Graphical Abstracthttps://doi.org/10.1007/s44246-023-00063-3Layered double hydroxidesShrimp shells biocharDry ball millingArsenic |
| spellingShingle | Ming Wang Jinlong Yan Yusen Diao Xiangqian Zhou Ting Luo Hui Wang Guixiang Quan Xinyu Sun Jun Wang Ball milled Mg/Al hydroxides modified nitrogen-rich biochar for arsenic removal: performance and governing mechanism Carbon Research Layered double hydroxides Shrimp shells biochar Dry ball milling Arsenic |
| title | Ball milled Mg/Al hydroxides modified nitrogen-rich biochar for arsenic removal: performance and governing mechanism |
| title_full | Ball milled Mg/Al hydroxides modified nitrogen-rich biochar for arsenic removal: performance and governing mechanism |
| title_fullStr | Ball milled Mg/Al hydroxides modified nitrogen-rich biochar for arsenic removal: performance and governing mechanism |
| title_full_unstemmed | Ball milled Mg/Al hydroxides modified nitrogen-rich biochar for arsenic removal: performance and governing mechanism |
| title_short | Ball milled Mg/Al hydroxides modified nitrogen-rich biochar for arsenic removal: performance and governing mechanism |
| title_sort | ball milled mg al hydroxides modified nitrogen rich biochar for arsenic removal performance and governing mechanism |
| topic | Layered double hydroxides Shrimp shells biochar Dry ball milling Arsenic |
| url | https://doi.org/10.1007/s44246-023-00063-3 |
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